Is Remembering the Kanji vol. I (James W. Heisig) (z-library.sk, 1lib.sk, z-lib.sk).pdf safe?
Safe file assessment
0 of 76 antivirus engines flagged the file.
4f1a1f3c8251caa03c…0843c42b92afa6Recommended 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.
No saved analyst narrative
This report keeps the verified scan facts available below without inventing an analysis that was not saved with the scan.
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
Partial1 of 4 contacted hosts were cross-checked; coverage is incomplete.
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
- 11MITRE ATT&CK techniques
- 6spawned processes
- 4network 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
Remembering the Kanji vol. I (James W. Heisig) (z-library.sk, 1lib.sk, z-lib.sk).pdf
4f1a1f3c8251caa03c6756f9931ae0f515ca8e666ed010557b0843c42b92afa6
01Uploaded file
Processes
Runtime execution
- ProcessObserved
Observed process
"C:\Program Files\Adobe\Acrobat DC\Acrobat\Acrobat.exe" "C:\Users\<USER>\Desktop\document.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
199.232.210.172
Contact observed during runtime.
06Isolated runtime analysis - Contacted hostObserved
2.20.156.175
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.
- 199.232.210.172
- 2.20.156.175
- 52.202.204.11
- http://download.windowsupdate.com/d/msdownload/update/others/2015/05/17930914_a3b333eff1f0428f5a2c87724c542504821cdbd8.cab
- 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\NGL\NGLClient_AcrobatReader123.8.20533.6 2024-07-15 23-09-52-615.log
- C:\Users\<USER>\AppData\Local\Temp\Tmp7881.tmp
- C:\Users\<USER>\AppData\Local\Temp\Tmp7E6E.tmp
- C:\Users\<USER>\AppData\Roaming\Adobe\Acrobat\9.0\SharedDataEvents-journal
- C:\Users\user\AppData\LocalLow\Adobe\AcroCef\DC\Acrobat\Cache\Code Cache\js\05349744be1ad4ad_0
- C:\Users\user\AppData\LocalLow\Adobe\AcroCef\DC\Acrobat\Cache\Code Cache\js\0786087c3c360803_0
- C:\Users\user\AppData\LocalLow\Adobe\AcroCef\DC\Acrobat\Cache\Code Cache\js\0998db3a32ab3f41_0
- C:\Users\user\AppData\LocalLow\Adobe\AcroCef\DC\Acrobat\Cache\Code Cache\js\0ace9ee3d914a5c0_0
- Local\Acrobat Instance Mutex
- Global\AdobeCrashProcessorLocalLowLock
- Local\ZonesCacheCounterMutex
- Local\ZonesLockedCacheCounterMutex
- 2AC1A572DB6944B0A65C38C4140AF2F4954751A310C
Files this sample writes at runtime
This file drops 10 children at runtime. None are currently flagged malicious in our cache.
- b9e3c3c717faec02233c…d8e5ebNever scannednever seen before
- bd656371531f669220d9…78eb50Never scannednever seen before
- 641af60cbbfbee8af595…9004c9Never scannednever seen before
- b5bef7ae9cb4d0998f92…f38518Never scannednever seen before
- 8c03ea2f91c57472fa65…6a0ea5Never scannednever seen before
- 27a64454cb31cde79e69…ff24ffNever scannednever seen before
- 6e097c6e5d353b4ccf57…0f31f0Never scannednever seen before
- eacad3e01b8b0a44ac03…df796dNever scannednever seen before
- 44c0236926074e782c17…6e2fadNever scannednever seen before
- 513fb5d3b4195ab59af2…64de2eNever 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
- 92sources 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.
Verdict inputView chapterProvenanceObservedSourceAntivirus analysisObserved at - 02
The hash has been submitted 106 times from 92 sources.
ProvenanceDerivedSourceSaved report factsObserved at - 03
Scanned file: Remembering the Kanji vol. I (James W. Heisig) (z-library.sk, 1lib.sk, z-lib.sk).pdf — 4f1a1f3c8251caa03c6756f9931ae0f515ca8e666ed010557b0843c42b92afa6
ProvenanceObservedSourceUploaded fileObserved at - 04
Observed process — "C:\Program Files\Adobe\Acrobat DC\Acrobat\Acrobat.exe" "C:\Users\<USER>\Desktop\document.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: NGLClient_AcrobatReader123.8.20533.6.log — C:\Users\<USER>\AppData\Local\Temp\NGL\NGLClient_AcrobatReader123.8.20533.6.log
ProvenanceObservedSourceIsolated runtime analysisObserved at - 08
Contacted host: 199.232.210.172 — Contact observed during runtime.
ProvenanceObservedSourceIsolated runtime analysisObserved at - 09
Contacted host: 2.20.156.175 — 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.
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.
Evidence199.232.210.172 · 2.20.156.175 · 52.202.204.11
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
Moderate prevalence — neither rare nor common. No strong prior applies.
Fingerprint and provenance
- File name
- Remembering the Kanji vol. I (James W. Heisig) (z-library.sk, 1lib.sk, z-lib.sk).pdf
- Format
- Code signing
- Not applicable to this file type
- Size
- 5.5 MB
- Last analyzed
- Jun 25, 2026, 1:59 PM UTC
4f1a1f3c8251caa03c6756f9931ae0f515ca8e666ed010557b0843c42b92afa6Safety & 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.
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Community
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