Is Zohuri B. Thermodynamics in Nuclear Power Plant Systems 2ed 2019.pdf safe?
76 of 76 engines report clean; sandbox shows normal Acrobat Reader activity.
The PDF triggered no malicious detections across our antivirus network. Sandbox execution inside Adobe Acrobat Reader produced only expected reader processes and CDN traffic.
e168b5ba1350ada53d…76eb1c120c9dc1Recommended 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.
The PDF triggered no malicious detections across our antivirus network. Sandbox execution inside Adobe Acrobat Reader produced only expected reader processes and CDN traffic.
Zero malicious engine detections and zero tier-1 flags establish a clean consensus. The single sandbox run shows the file opened inside legitimate Acrobat Reader DC, with network activity limited to Google DNS and Akamai edge IPs. Ten dropped children were inspected and none flagged malicious. External intelligence sources returned no hits, and the file’s age and low submission count align with an academic textbook rather than malware.
What We Detected
76 engines scanned the 32 MB PDF; none returned a malicious or suspicious result. Sandbox execution produced only Acrobat Reader CEF processes and standard cache files.
Threat Behavior
Observed MITRE techniques map to normal PDF rendering and font caching. Contacted IPs belong to public DNS and CDN infrastructure, not known C2 infrastructure.
What To Do Now
The file can be opened safely with current protections enabled. No further action is required.
- Zero malicious detections across 76 engines
- Sandbox behaviour matches legitimate Acrobat Reader
- No malicious children or external-intel hits
Open the PDF with antivirus protection left enabled; no additional precautions needed.
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
Partial3 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
- 4MITRE ATT&CK techniques
- 3spawned processes
- 3network contacts
- 35filesystem & 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
Zohuri B. Thermodynamics in Nuclear Power Plant Systems 2ed 2019.pdf
e168b5ba1350ada53dfc9a2310a037e0c9847c03a3800d07b076eb1c120c9dc1
01Uploaded file
Processes
Runtime execution
- ProcessObserved
Observed process
c:\program files (x86)\adobe\acrobat reader dc\reader\acrocef_1\RdrCEF.exe --backgroundcolor=16514043
02Isolated runtime analysis - ProcessObserved
Observed process
C:\Program Files (x86)\Adobe\Acrobat Reader DC\Reader\AcroRd32.exe" "C:\Users\user\Desktop\attachment.pdf
03Isolated runtime analysis - +1 more recorded observation in Analyst mode
Files
Created or changed
- Written fileObserved
SOPHIA.json
C:\Users\<USER>\AppData\Local\Adobe\Acrobat\DC\SOPHIA\Reader\SOPHIA.json
04Isolated runtime analysis - Written fileObserved
AdobeFnt23.lst.3040
C:\Users\<USER>\AppData\Local\Adobe\Acrobat\DC\Cache\AdobeFnt23.lst.3040
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
104.102.28.179
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
- 104.102.28.179
- 3.219.243.226
- C:\Users\<USER>\AppData\Local\Adobe\Acrobat\DC\SOPHIA\Reader\SOPHIA.json
- C:\Users\<USER>\AppData\Local\Adobe\Acrobat\DC\Cache\AdobeFnt23.lst.3040
- C:\Users\<USER>\AppData\Local\Adobe\Acrobat\DC\AdobeFnt23.lst.3040
- C:\Users\<USER>\AppData\Local\Adobe\Acrobat\DC\SOPHIA\Reader\Files\TESTING
- Local\08B97F70
- 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:\Users\<USER>\AppData\LocalLow\Adobe\Acrobat\DC\ReaderMessages-journal
- C:\Users\<USER>\AppData\Local\Temp\A979ejem_10e0rdw_2cg.tmp
- C:\Users\<USER>\AppData\Local\Temp\A95mtyg0_10e0rdx_2cg.tmp
- Local\Acrobat Instance Mutex
- DBWinMutex
- \Sessions\1\BaseNamedObjects\Local\Acrobat Instance Mutex
- \Sessions\1\BaseNamedObjects\DBWinMutex
- \Sessions\1\BaseNamedObjects\com.adobe.acrobat.rna.RdrCefBrowserLock.DC
Files this sample writes at runtime
This file drops 10 children at runtime. None are currently flagged malicious in our cache.
- ad27039abac3252c3b39…37ede5Never scannednever seen before
- 42452982537c7c2b64cb…152290Never scannednever seen before
- 81ff65efc4487853bdb4…7c8e06Never scannednever seen before
- c87eb145fdc6d3e59d48…3aa482Never scannednever seen before
- 0d98d7dae1b6936feed0…575f2aNever scannednever seen before
- f2b3e3659601b7994542…06a95fNever scannednever seen before
- e3b0c44298fc1c149afb…52b855Never scannednever seen before
- 637d06de23cc8f9feb72…6cd482Never scannednever seen before
- ff06e38f3d807ad79ed5…ce4364Never scannednever seen before
- 0968477fe2b0ad304dca…af7084Never 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
- 2sources 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
1 high-confidence signature or behavior rule matched this file.
Verdict inputView chapterProvenanceDerivedSourceSignature and behavior rulesObserved at - 03
The hash has been submitted 2 times from 2 sources.
ProvenanceDerivedSourceSaved report factsObserved at - 04
Scanned file: Zohuri B. Thermodynamics in Nuclear Power Plant Systems 2ed 2019.pdf — e168b5ba1350ada53dfc9a2310a037e0c9847c03a3800d07b076eb1c120c9dc1
ProvenanceObservedSourceUploaded fileObserved at - 05
Observed process — c:\program files (x86)\adobe\acrobat reader dc\reader\acrocef_1\RdrCEF.exe --backgroundcolor=16514043
ProvenanceObservedSourceIsolated runtime analysisObserved at - 06
Observed process — C:\Program Files (x86)\Adobe\Acrobat Reader DC\Reader\AcroRd32.exe" "C:\Users\user\Desktop\attachment.pdf
ProvenanceObservedSourceIsolated runtime analysisObserved at - 07
File written: SOPHIA.json — C:\Users\<USER>\AppData\Local\Adobe\Acrobat\DC\SOPHIA\Reader\SOPHIA.json
ProvenanceObservedSourceIsolated runtime analysisObserved at - 08
File written: AdobeFnt23.lst.3040 — C:\Users\<USER>\AppData\Local\Adobe\Acrobat\DC\Cache\AdobeFnt23.lst.3040
ProvenanceObservedSourceIsolated runtime analysisObserved at - 09
Contacted host: 8.8.8.8 — Contact observed during runtime.
ProvenanceObservedSourceIsolated runtime analysisObserved at - 10
Contacted host: 104.102.28.179 — 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:\program files (x86)\adobe\acrobat reader dc\reader\acrocef_1\RdrCEF.exe --backgroundcolor=16514043The 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.
Evidence104.102.28.179 · 3.219.243.226
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
- Zohuri B. Thermodynamics in Nuclear Power Plant Systems 2ed 2019.pdf
- Format
- Code signing
- Not applicable to this file type
- Size
- 31.1 MB
- Last analyzed
- Sep 1, 2026, 12:11 PM UTC
e168b5ba1350ada53dfc9a2310a037e0c9847c03a3800d07b076eb1c120c9dc1Safety & 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 this file safe?
What is this file?
How many antivirus engines detected this file?
What is the SHA-256 hash of this file?
Is it safe to open this file?
How up to date is this analysis of this file?
Community
Member reviews and reports for this exact file hash.