Is lNV_V3H7Y9J.pdf safe?
PDF file shows sandbox activity mapping to credential access and process injection but zero engine detections and no external-intel hits.
No antivirus engine flagged the sample, yet the sandbox recorded LSASS access and process-injection behaviour. Coverage is low and the file is only one day old, so the evidence is inconclusive.
9959c82fa7ebb964a2…38a7a435f10f4aRecommended next actions
Before opening
Treat the file as unverified and avoid opening it until more evidence is available.
If you already opened it
Run a full device scan. If its origin cannot be confirmed, delete this file and use a fresh copy from a trusted source.
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.
No antivirus engine flagged the sample, yet the sandbox recorded LSASS access and process-injection behaviour. Coverage is low and the file is only one day old, so the evidence is inconclusive.
Zero detections from 74 engines, including 17 tier-1 engines, is a strong clean signal. However, the sandbox recorded three offensive MITRE techniques and the file is rare and newly submitted. Because contactedHosts is null, no host-reputation cross-check is available. The combination of clean engine results and limited behavioural context places the sample in the unknown band.
What We Detected
74 engines scanned the PDF; none returned a malicious or suspicious label. Sandbox execution produced MITRE mappings T1003, T1055 and T1485, but the sandbox itself did not issue a malicious verdict. Ten dropped files were inspected and none were flagged malicious.
Threat Behavior
The sandbox observed activity consistent with credential dumping and process injection, yet no external intelligence sources (CIRCL, MalwareBazaar, YARAify) contain matching rules or known-malicious records. Contacted-host reputation data is unavailable.
What To Do Now
Do not open the PDF on production systems until additional sandbox runs or manual analysis can confirm the observed behaviour. Keep endpoint protection enabled.
Where this verdict could be wrong2 caveats
- Sandbox recorded LSASS access (T1003) and process-injection mapping (T1055), which could indicate malicious activity if the sandbox verdict had been positive.
- contactedHosts is null, so no complete host-reputation result is available to rule out malicious infrastructure.
These are the assessment's weak points. If you believe one applies to your file, report the verdict and we'll re-review it.
- Zero detections across 74 engines
- No external-intel hits from CIRCL, MalwareBazaar or YARAify
- Sandbox recorded LSASS access and process-injection mappings
- File is rare and only one day old
Treat the file as untrusted until further sandbox or manual analysis is completed; keep all security software enabled.
Coverage & freshness
Complete means the check returned a usable result. It does not mean the file is safe.
Antivirus
Complete0 of 74 engines flagged the file.
Sandbox
Complete1 isolated runtime environment contributed observations.
Network
Partial1 runtime contact was 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
- 13MITRE ATT&CK techniques
- 15spawned processes
- 1network contacts
- 34filesystem & mutex artifacts
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
lNV_V3H7Y9J.pdf
9959c82fa7ebb964a272c40bd833080864fcbe4c6abf3746a538a7a435f10f4a
01Uploaded file
Processes
Runtime execution
- ProcessObserved
Observed process
C:\Windows\System32\mobsync.exe -Embedding
02Isolated runtime analysis - ProcessObserved
Observed process
"C:\Program Files\Adobe\Acrobat DC\Acrobat\Acrobat.exe" "C:\Users\<USER>\Desktop\lNV_V3H7Y9J.pdf"
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
Tmp1056.tmp
C:\Users\<USER>\AppData\Local\Temp\Tmp1056.tmp
05Isolated runtime analysis - +1 more recorded observation in Analyst mode
Network
Hosts contacted
- Contacted hostObserved
8.8.8.8
Contact observed during runtime.
06Isolated runtime analysis
6 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.
- 8.8.8.8
- C:\Users\<USER>\AppData\Local\Temp\acroNGLLog.txt
- C:\Users\<USER>\AppData\Local\Temp\Tmp1056.tmp
- C:\Users\<USER>\AppData\Local\Temp\Tmp11CE.tmp
- C:\Users\<USER>\AppData\Local\Temp\A95e1ybm_1oggcri_tc.tmp
- C:\Users\<USER>\AppData\Local\Temp\A9husn0_1oggcrj_tc.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
- Local\SyncServiceThread
- Local\SessionImmersiveColorMutex
- Global\_MSIExecute
- Global\MSILOG_bfef20ba1dd1f2cGOL.94431ISM_pmeT_lacoL_ataDppA_onurB_sresU_:C
- Global\AdobeCrashProcessorLocalLowLock
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
- ad27039abac3252c3b39…37ede5Never scannednever seen before
- 2ebda85960d1cd23a8a3…bbba6cNever scannednever seen before
- 81ff65efc4487853bdb4…7c8e06Never scannednever seen before
- 1c9a0c2010f1a14e44f9…363a30Never scannednever seen before
- 46c610edd97ed1771e64…4b3c5eNever scannednever seen before
- e3b0c44298fc1c149afb…52b855Never scannednever seen before
- ff824d7d7ba880afc359…cc65c0Never scannednever seen before
- a5c6d4dbae668479ccb9…11631bNever 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 / 74engines 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
1 high-confidence signature or behavior rule matched this file.
Verdict inputView chapterProvenanceDerivedSourceSignature and behavior rulesObserved at - 02
0 of 74 antivirus engines flagged the file.
ProvenanceObservedSourceAntivirus analysisObserved at - 03
The hash has been submitted 1 time from 1 source.
ProvenanceDerivedSourceSaved report factsObserved at - 04
Scanned file: lNV_V3H7Y9J.pdf — 9959c82fa7ebb964a272c40bd833080864fcbe4c6abf3746a538a7a435f10f4a
ProvenanceObservedSourceUploaded fileObserved at - 05
Observed process — C:\Windows\System32\mobsync.exe -Embedding
ProvenanceObservedSourceIsolated runtime analysisObserved at - 06
Observed process — "C:\Program Files\Adobe\Acrobat DC\Acrobat\Acrobat.exe" "C:\Users\<USER>\Desktop\lNV_V3H7Y9J.pdf"
ProvenanceObservedSourceIsolated runtime analysisObserved at - 07
File written: acroNGLLog.txt — C:\Users\<USER>\AppData\Local\Temp\acroNGLLog.txt
ProvenanceObservedSourceIsolated runtime analysisObserved at - 08
File written: Tmp1056.tmp — C:\Users\<USER>\AppData\Local\Temp\Tmp1056.tmp
ProvenanceObservedSourceIsolated runtime analysisObserved at - 09
Contacted host: 8.8.8.8 — 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
A community signature or high-severity behavioral heuristic matched. Signatures identify known patterns; heuristics are strong leads but are not proof on their own.
The saved runtime evidence maps this activity to MITRE T1055 (Process Injection). The mapping supports possible process injection, but it does not prove the exact injection method or the operator's intent.
EvidenceC:\Windows\Explorer.EXESandbox 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.exe
0 of 74 engines flagged this file
View all 74 engine results
PE structure
Not applicablePE structure analysis applies to Windows executable formats, not this file type.
How widely this file has been seen
Barely seen in the wild and first surfaced recently. That limits reputation evidence, but rarity alone is not proof of malware.
Fingerprint and provenance
- File name
- lNV_V3H7Y9J.pdf
- Format
- Code signing
- Not applicable to this file type
- Size
- 188.8 KB
- Last analyzed
- Jul 29, 2026, 10:30 PM UTC
9959c82fa7ebb964a272c40bd833080864fcbe4c6abf3746a538a7a435f10f4aSafety & FAQ
Complete recovery guidance and answers for the next decision.
What to do now
There isn't enough information to give this file a clear rating.
- Recovery step 01
Be cautious — an unknown rating is not the same as a clean bill of health.
- Recovery step 02
Open it only when its sender or download source is one you independently trust.
- Recovery step 03
When in doubt, don't open it — or scan it again later once it's more widely seen.
Safety FAQ
Direct answers grounded in the saved verdict and evidence in this report.
Is lNV_V3H7Y9J.pdf safe? What is it?
What is lNV_V3H7Y9J.pdf?
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Community
Member reviews and reports for this exact file hash.