Is vdoc.pub_introduction-to-industrial-automation.pdf safe?
PDF file with zero engine detections, clean sandbox verdict, and no malicious child or host signals.
All 77 engines returned clean results and the single sandbox run produced no malicious verdict. The three triggered heuristics explicitly note that the observed mappings do not prove malicious intent.
549e2e532213b05837…543a58b5d4c56cRecommended next actions
Before opening
Open it only when its sender or download source is one you independently trust.
If you already opened it
Keep normal device protection enabled and stop if the file behaves unexpectedly.
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 77 engines returned clean results and the single sandbox run produced no malicious verdict. The three triggered heuristics explicitly note that the observed mappings do not prove malicious intent.
Zero malicious detections across tier-1 and tier-2 engines combined with a clean sandbox verdict and no malicious dropped children or no complete contacted-host reputation result was available. The synthesis heuristics that fired are designed to surface possible MITRE mappings rather than confirm malice, and each rule text cautions against treating the mapping as proof. Medium prevalence over nearly nine years with no external-intel hits further supports a safe determination.
What We Detected
77 engines scanned the PDF; none flagged it malicious or suspicious. One sandbox execution recorded MITRE techniques T1003, T1055 and T1485, but the sandbox itself returned no malicious verdict.
Threat Behavior
The triggered heuristics map observed activity to process injection and credential dumping, yet each rule explicitly states the mapping does not prove malicious intent. Contacted IPs include Google DNS and known CDN ranges; no complete contacted-host reputation result was available were identified in our cache.
What To Do Now
The file can be opened with standard PDF readers. Keep endpoint protection enabled; no additional action is required.
Where this verdict could be wrong1 caveat
- triggeredHeuristics surfaced high-severity ProcessInjection mapping, but the rule itself states it does not prove malicious intent or exact method.
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 77 engines
- Clean sandbox verdict
- No malicious dropped children
- no complete contacted-host reputation result was available
Open the PDF normally; no further security action is needed.
Coverage & freshness
Complete means the check returned a usable result. It does not mean the file is safe.
Antivirus
Complete0 of 77 engines flagged the file.
Sandbox
Complete1 isolated runtime environment contributed observations.
Network
Partial2 of 21 contacted hosts were cross-checked; coverage is incomplete.
YARA
Complete3 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
- 14MITRE ATT&CK techniques
- 11spawned processes
- 21network contacts
- 40filesystem & 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
vdoc.pub_introduction-to-industrial-automation.pdf
549e2e532213b0583710c538d889d2026a3fe06ca9b24181e5543a58b5d4c56c
01Uploaded file
Processes
Runtime execution
- ProcessObserved
Observed process
"C:\Program Files\Adobe\Acrobat DC\Acrobat\Acrobat.exe" "C:\Users\<USER>\Desktop\attachment.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
NGLClient_AcrobatReader123.8.20533.6.log
C:\Users\<USER>\AppData\Local\Temp\NGL\NGLClient_AcrobatReader123.8.20533.6.log
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 - Contacted hostObserved
104.18.10.207
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.
- 8.8.8.8
- 104.18.10.207
- 18.165.227.82
- 3.215.172.219
- 13.224.245.89
- 104.16.129.114
- 143.204.68.37
- 47.246.99.254
- 3.92.120.28
- 141.193.213.20
- https://ardownload3.adobe.com/pub/adobe/reader/win/AcrobatDC/2200320263/AcroRdrDCUpd2200320263.msi
- http://taylorandfrancis.com/
- C:\Users\<USER>\AppData\Local\Temp\acroNGLLog.txt
- C:\Users\<USER>\AppData\Local\Temp\NGL\NGLClient_AcrobatReader123.8.20533.6.log
- C:\Users\<USER>\AppData\Local\Temp\Tmp9437.tmp
- C:\Users\<USER>\AppData\Local\Temp\A9f612dt_1sj5p8e_ls.tmp
- C:\Users\<USER>\AppData\Local\Temp\A9iwznat_1sj5p8i_ls.tmp
- C:\Users\<USER>\AppData\Roaming\Adobe\Acrobat\DC\JSCache\GlobSettings
- 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
- C:\Windows\Temp\13913.txt
- C:\Users\<USER>\AppData\LocalLow\Adobe\Acrobat\DC\ReaderMessages-journal
- Local\Acrobat Instance Mutex
- Global\_MSIExecute
- Global\MSILOG_c2e901ed1db231bGOL.801a2ISM_pmeT_lacoL_ataDppA_onurB_sresU_:C
- Global\AdobeCrashProcessorLocalLowLock
- Local\ZonesCacheCounterMutex
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
- 4f6d33bcbe47aa69e38c…39a390Never scannednever seen before
- ea04550db3423335bb52…2708afNever scannednever seen before
- ecf329f42674b1db0d2b…6f64a2Never scannednever seen before
- a779a261df447a4c298c…b1b86dNever scannednever seen before
- a6ce2291a38cc10f8e64…b90d1eNever scannednever seen before
- 178445d94de1694a5936…33c1ceNever scannednever seen before
- 81ff65efc4487853bdb4…7c8e06Never scannednever seen before
- 7a5cf34252a1fa36d9fb…738e8fNever scannednever seen before
- 8233d8ef22fa949d4b6b…07c301Never 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.
- 3rule hits recorded
- 0 / 77engines flagged
- 9sources 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 77 antivirus engines flagged the file.
Verdict inputView chapterProvenanceObservedSourceAntivirus analysisObserved at - 02
1 high-confidence signature or behavior rule matched this file.
Verdict inputView chapterProvenanceDerivedSourceSignature and behavior rulesObserved at - 03
The hash has been submitted 10 times from 9 sources.
ProvenanceDerivedSourceSaved report factsObserved at - 04
Scanned file: vdoc.pub_introduction-to-industrial-automation.pdf — 549e2e532213b0583710c538d889d2026a3fe06ca9b24181e5543a58b5d4c56c
ProvenanceObservedSourceUploaded fileObserved at - 05
Observed process — "C:\Program Files\Adobe\Acrobat DC\Acrobat\Acrobat.exe" "C:\Users\<USER>\Desktop\attachment.pdf"
ProvenanceObservedSourceIsolated runtime analysisObserved at - 06
Observed process — "C:\Program Files\Adobe\Acrobat DC\Acrobat\Adobe Crash Processor.exe"
ProvenanceObservedSourceIsolated runtime analysisObserved at - 07
File written: acroNGLLog.txt — C:\Users\<USER>\AppData\Local\Temp\acroNGLLog.txt
ProvenanceObservedSourceIsolated runtime analysisObserved at - 08
File written: NGLClient_AcrobatReader123.8.20533.6.log — C:\Users\<USER>\AppData\Local\Temp\NGL\NGLClient_AcrobatReader123.8.20533.6.log
ProvenanceObservedSourceIsolated runtime analysisObserved at - 09
Contacted host: 8.8.8.8 — Contact observed during runtime.
ProvenanceObservedSourceIsolated runtime analysisObserved at - 10
Contacted host: 104.18.10.207 — 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.
Evidence"C:\Program Files\Adobe\Acrobat DC\Acrobat\Acrobat.exe" "C:\Users\<USER>\Desktop\attachment.pdf"MITRE T1003 (OS Credential Dumping) mapped by at least one sandbox run.
The 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.
Evidence104.18.10.207 · 18.165.227.82 · 3.215.172.219
0 of 77 engines flagged this file
View all 77 engine results
PE structure
Not applicablePE structure analysis applies to Windows executable formats, not this file type.
How widely this file has been seen
Moderate prevalence — neither rare nor common. No strong prior applies.
Fingerprint and provenance
- File name
- vdoc.pub_introduction-to-industrial-automation.pdf
- Format
- Code signing
- Not applicable to this file type
- Size
- 43.9 MB
- Last analyzed
- Aug 25, 2026, 7:22 AM UTC
549e2e532213b0583710c538d889d2026a3fe06ca9b24181e5543a58b5d4c56cSafety & FAQ
Complete recovery guidance and answers for the next decision.
What to do now
This file appears low risk based on the evidence available now.
- Recovery step 01
Open it only when its sender or download source is one you independently trust.
- Recovery step 02
A clean result reduces known risk, but it cannot guarantee that every new or targeted threat has been detected.
- Recovery step 03
Keep your antivirus and Windows updates switched on so you stay protected.
Safety FAQ
Direct answers grounded in the saved verdict and evidence in this report.
Is vdoc.pub_introduction-to-industrial-automation.pdf safe?
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Community
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