Is preview-9781292260938_A37749286.pdf safe?
No antivirus engine detected the PDF, but one sandbox associated its execution with credential-access and destructive techniques plus unresolved direct-IP traffic.
All 76 antivirus engines avoided flagging this PDF, including 17 tier-1 engines, and no malicious child or external-intelligence match was found. However, one sandbox associated execution with T1003 and T1485 and recorded five IP contacts whose reputations were not checked, so cautious handling is appropriate.
4598841058b0dbc75e…53ed34d98a1a5bRecommended next actions
Before opening
Do not open it until the source can be verified independently.
If you already opened it
Stop using it, scan the device, and watch for unexpected behavior or security alerts. Get a fresh copy from the original trusted source and verify its exact hash when possible.
Intelligence
The saved assessment, checked against the scan evidence and recorded coverage.
The reasoning behind this verdict
This section explains the evidence supporting the verdict and keeps conflicting or missing signals visible.
All 76 antivirus engines avoided flagging this PDF, including 17 tier-1 engines, and no malicious child or external-intelligence match was found. However, one sandbox associated execution with T1003 and T1485 and recorded five IP contacts whose reputations were not checked, so cautious handling is appropriate.
Static scanning found no detection among 76 engines, and all 17 reporting tier-1 engines were silent. One completed sandbox run nevertheless associated the execution with credential-access technique T1003 and data-destruction technique T1485. It also recorded five direct IP contacts, but no complete host-reputation result is available. The sandbox itself did not issue a malicious verdict, and none of the ten inspected child hashes was identified as malicious, although every child remained unclassified. No external-intelligence rule or known-malware match corroborated the behavioral indicators, leaving materially mixed evidence.
What We Detected
No antivirus engine flagged the PDF: 0 of 76 detections, including no alerts from 17 tier-1 engines. MalwareBazaar, CIRCL, and YARAify also supplied no match or family attribution.
Threat Behavior
One sandbox run associated execution with T1003 credential access and T1485 data destruction. A credential-dumper heuristic referenced access involving lsass.exe, while another heuristic noted direct-IP traffic. Five IP addresses were observed, but no complete host-reputation cross-check was saved, so their status remains unresolved. The sandbox did not issue a malicious verdict, and ten inspected child hashes produced no identified malicious child, although all ten remain unclassified.
What To Do Now
Open the document only if its source and purpose are expected, using an updated PDF reader with endpoint protection enabled. For an unsolicited document, verify it with the sender or isolate it for additional analysis before opening.
Where this verdict could be wrong3 caveats
- The complete 0/76 detection result and 17 tier-1 non-detections weigh against the runtime heuristic findings.
- No sandbox produced a malicious verdict, and neither MalwareBazaar nor YARAify supplied corroboration.
- The file is rare, with prevalence.uniqueSources=1 and prevalence.timesSubmitted=1, so the absence of detections has limited reputation support.
These are the assessment's weak points. If you believe one applies to your file, report the verdict and we'll re-review it.
- 0 of 76 antivirus engines reported a detection.
- All 17 reporting tier-1 engines produced no alert.
- behaviour.hasMaliciousSandboxVerdict=false.
- droppedChildren.hasMaliciousChild=false.
- MalwareBazaar, CIRCL, and YARAify returned no corroborating hit.
- One sandbox associated execution with T1003 credential-access activity.
- T1485 data-destruction behavior was reported.
- Five direct IP contacts lack a completed reputation cross-check.
- The PDF is rare, with only one recorded submitter and submission.
- All ten inspected child hashes remain unclassified.
Verify the PDF's origin before opening it, preferably in an isolated environment with an updated reader. Keep antivirus and endpoint protection enabled.
Coverage & freshness
Complete means the check returned a usable result. It does not mean the file is safe.
Antivirus
Complete0 of 76 engines flagged the file.
Sandbox
Complete1 isolated runtime environment contributed observations.
Network
Partial5 runtime contacts were observed without a completed reputation cross-check.
YARA
Complete2 signature or behavior rules matched.
External intel
Complete3 of 3 independent reference sources completed.
Behavior
Plain-English impact first, then the observed runtime evidence.
Runtime flight recorder
Capture complete- 1isolated sandbox run
- 10MITRE ATT&CK techniques
- 15spawned processes
- 5network contacts
- 36filesystem & mutex artifacts
What this file does
Observed actions and their security significance
High concern: Accessed operating-system credential data, which can expose saved passwords.
Moderate concern: Communicated over a common application protocol; malware can use this for command-and-control.
Note: Collects details about your system.
These are observed capabilities from an isolated analysis. A technique does not prove malicious intent on its own, and the file never ran on your device.
Attack story
Runtime observations grouped by analysis stage. Arrows organize the stages; they do not claim chronology or causality.
Input file
The submitted object
- FileObserved
preview-9781292260938_A37749286.pdf
4598841058b0dbc75ee8fa729ef4a158f1ae519c7b2c0b308153ed34d98a1a5b
01Uploaded file
Processes
Runtime execution
- ProcessObserved
Observed process
"C:\Program Files\Adobe\Acrobat DC\Acrobat\Acrobat.exe" "C:\Users\<USER>\Desktop\preview-9781292260938_A37749286.pdf"
02Isolated runtime analysis - ProcessObserved
Observed process
"C:\Program Files\Adobe\Acrobat DC\Acrobat\Adobe Crash Processor.exe"
03Isolated runtime analysis - +1 more recorded observation in Analyst mode
Files
Created or changed
- Written fileObserved
acroNGLLog.txt
C:\Users\<USER>\AppData\Local\Temp\acroNGLLog.txt
04Isolated runtime analysis - Written fileObserved
Tmp21EA.tmp
C:\Users\<USER>\AppData\Local\Temp\Tmp21EA.tmp
05Isolated runtime analysis - +1 more recorded observation in Analyst mode
Network
Hosts contacted
- Contacted hostObserved
23.32.128.138
Contact observed during runtime.
06Isolated runtime analysis - Contacted hostObserved
23.55.124.138
Contact observed during runtime.
07Isolated runtime analysis - +1 more recorded observation in Analyst mode
7 recorded facts from one runtime window. Every fact remains independently traceable in Analyst mode.
What this file did when executed
This file was detonated in 1 sandbox and its runtime behaviour was observed.
Adversary techniques mapped to the MITRE ATT&CK framework.
- 23.32.128.138
- 23.55.124.138
- 52.6.155.20
- 8.8.8.8
- 52.73.45.44
- C:\Users\<USER>\AppData\Local\Temp\acroNGLLog.txt
- C:\Users\<USER>\AppData\Local\Temp\Tmp21EA.tmp
- C:\Users\<USER>\AppData\Local\Temp\Tmp2518.tmp
- C:\Users\<USER>\AppData\Local\Temp\A925euex_euyt8f_5fs.tmp
- C:\Windows\ServiceProfiles\LocalService\AppData\Local\FontCache\Fonts\Download-1.tmp
- C:\Users\<USER>\AppData\Roaming\Adobe\Acrobat\DC\JSCache\GlobSettings
- C:\Users\<USER>\AppData\Local\Packages\Microsoft.XboxGamingOverlay_8wekyb3d8bbwe\LocalCache\KnownGameList.bin
- C:\Users\<USER>\AppData\Local\Microsoft\GameDVR\KnownGameList.update
- C:\Users\<USER>\AppData\Local\Adobe\Acrobat\DC\SOPHIA\Reader\Files\DC_READER_LAUNCH_CARD
- C:\Users\<USER>\AppData\Local\Adobe\Acrobat\DC\SOPHIA\Reader\Files\ACROBAT_READER_MASTER_SURFACEID
- Global\_MSIExecute
- Global\MSILOG_bb0ab2c61dc077fGOL.d1421ISM_pmeT_lacoL_ataDppA_onurB_sresU_:C
- Global\AdobeCrashProcessorLocalLowLock
- \Sessions\1\BaseNamedObjects\{100184D2-BDC3-477a-B8D3-65548B67914C}_6932
- \Sessions\1\BaseNamedObjects\Local\{100184D2-BDC3-477a-B8D3-65548B67914C}_1740
Files this sample writes at runtime
This file drops 10 children at runtime. None are currently flagged malicious in our cache.
- eacad3e01b8b0a44ac03…df796dNever scannednever seen before
- 513fb5d3b4195ab59af2…64de2eNever scannednever seen before
- 62cb575bc74136103794…e09eddNever scannednever seen before
- a779a261df447a4c298c…b1b86dNever scannednever seen before
- a47cbd88fa3b355cba59…3b603eNever scannednever seen before
- 81ff65efc4487853bdb4…7c8e06Never scannednever seen before
- c05177934b3d9ebd36d4…55c28eNever scannednever seen before
- 8ce4a861885536d8910a…5255e5Never scannednever seen before
- 46f3061e2b30dd93f0f7…14e27aNever scannednever seen before
- e3b0c44298fc1c149afb…52b855Never scannednever seen before
Detection & Forensics
Consensus, attribution, signatures, code structure, prevalence, and identity.
Evidence integrity
Chain of custody for the facts preserved in this report.
- 2rule hits recorded
- 0 / 76engines flagged
- 1sources in submission history
Why these facts are shown
Each statement identifies whether it was directly recorded or derived from saved scan facts.
- 01
0 of 76 antivirus engines flagged the file.
ProvenanceObservedSourceAntivirus analysisObserved at - 02
The hash has been submitted 1 time from 1 source.
ProvenanceDerivedSourceSaved report factsObserved at - 03
Scanned file: preview-9781292260938_A37749286.pdf — 4598841058b0dbc75ee8fa729ef4a158f1ae519c7b2c0b308153ed34d98a1a5b
ProvenanceObservedSourceUploaded fileObserved at - 04
Observed process — "C:\Program Files\Adobe\Acrobat DC\Acrobat\Acrobat.exe" "C:\Users\<USER>\Desktop\preview-9781292260938_A37749286.pdf"
ProvenanceObservedSourceIsolated runtime analysisObserved at - 05
Observed process — "C:\Program Files\Adobe\Acrobat DC\Acrobat\Adobe Crash Processor.exe"
ProvenanceObservedSourceIsolated runtime analysisObserved at - 06
File written: acroNGLLog.txt — C:\Users\<USER>\AppData\Local\Temp\acroNGLLog.txt
ProvenanceObservedSourceIsolated runtime analysisObserved at - 07
File written: Tmp21EA.tmp — C:\Users\<USER>\AppData\Local\Temp\Tmp21EA.tmp
ProvenanceObservedSourceIsolated runtime analysisObserved at - 08
Contacted host: 23.32.128.138 — Contact observed during runtime.
ProvenanceObservedSourceIsolated runtime analysisObserved at - 09
Contacted host: 23.55.124.138 — Contact observed during runtime.
ProvenanceObservedSourceIsolated runtime analysisObserved at
Detection sources at a glance
The available sources did not agree on a named threat category.
MalwareBazaar, YARAify, and CIRCL hashlookup completed and returned no entries for this hash.
Signatures and behavior heuristics
Behavioral heuristics matched patterns associated with malware. Corroborating evidence determines how much weight they carry.
Sandbox observed process activity targeting LSASS (Windows credential store). Legitimate software has no business reading LSASS memory — this is Mimikatz-shape behaviour.
EvidenceC:\Windows\system32\lsass.exeThe sample contacted an external IP address directly and no application domain was recorded. Direct-IP traffic also occurs in legitimate installers and infrastructure, so this is supporting context only and requires corroboration from host reputation and other runtime evidence.
Evidence23.32.128.138 · 23.55.124.138 · 52.6.155.20
0 of 76 engines flagged this file
View all 76 engine results
PE structure
Not applicablePE structure analysis applies to Windows executable formats, not this file type.
How widely this file has been seen
Rarely uploaded, but has been around for a while. Often niche legitimate software or old internal tooling; not a strong malware signal on its own.
Fingerprint and provenance
- File name
- preview-9781292260938_A37749286.pdf
- Format
- Code signing
- Not applicable to this file type
- Size
- 24.5 MB
- Last analyzed
- Sep 21, 2026, 4:38 PM UTC
4598841058b0dbc75ee8fa729ef4a158f1ae519c7b2c0b308153ed34d98a1a5bSafety & FAQ
Complete recovery guidance and answers for the next decision.
What to do now
We couldn't fully clear this file. Treat it with caution.
- Recovery step 01
Don't open it unless you're certain it came from a source you trust.
- Recovery step 02
Check where you got it — an unexpected attachment or a random download link is a red flag.
- Recovery step 03
If its origin cannot be confirmed, delete this file and use a fresh copy from a trusted source. Get a fresh copy from the original trusted source and verify its exact hash when possible.
- Recovery step 04
If you're still unsure, scan it again in a day or two — detections often catch up on newer files.
Safety FAQ
Direct answers grounded in the saved verdict and evidence in this report.
Is preview-9781292260938_A37749286.pdf safe, or is it malware?
What is preview-9781292260938_A37749286.pdf?
How many antivirus engines detected preview-9781292260938_A37749286.pdf?
What should I do if I already opened preview-9781292260938_A37749286.pdf?
How do I remove preview-9781292260938_A37749286.pdf?
What is the SHA-256 hash of preview-9781292260938_A37749286.pdf?
How up to date is this analysis of preview-9781292260938_A37749286.pdf?
Community
Member reviews and reports for this exact file hash.