File scan report
Verdict Safe
Is this PDF document safe? Yes, no threats found.
A 6-year-old PDF with zero malicious detections across 76 engines and medium prevalence.
Moderate evidence · No engine flags it, but no publisher signature confirms who made it.
The evidence supports treating the file as benign; no additional action is required beyond normal security hygiene.
Good practice2 tips
We found nothing harmful in this file.
Open it only if you trust the person or website it came from.
Keep your security software and system updates switched on.
No scanner can promise a file is 100% safe.
Reads the latest antivirus results for this file's hash. Nothing is uploaded.
Antivirus results
0 of 61 flagged
- Flagged 0
- No detection 61
- No result 15
- Code signing Not applicable
- Test run Completed
- First seen 7y ago
Chapter 02
Why we think so
0 points against it and 3 in its favour, checked against the scan evidence.
The reasoning behind this verdict
All 61 antivirus engines that checked it returned clean results with 18 major antivirus engines explicitly marking it harmless. The file has been submitted 27 times over six years with no malicious files it created or sandbox verdicts.
Zero malicious detections from any engine tier combined with a medium-prevalence history spanning 2815 days indicate a long-standing benign document. Sandbox execution produced only techniques common in legitimate software and no offensive MITRE activity. The single rule-based trigger notes direct-IP traffic but explicitly requires host-reputation correlation that is unavailable here. No external-intel hits or dropped malicious files it created exist.
What We Detected
76 engines scanned the PDF; none flagged malicious content. 18 major antivirus engines explicitly returned clean. Sandbox analysis recorded two MITRE techniques common in legitimate software and direct-IP contacts, but no offensive techniques or malicious verdicts.
Threat Behavior
No persistence mechanisms, registry modifications, or dropped malicious files it created were observed. The rule-based rule that fired acknowledges direct-IP traffic can occur in legitimate software and requires further correlation.
What To Do Now
The file shows no malicious indicators. Continue normal handling while keeping security software enabled.
Where this verdict could be wrong1 caveat
- The missing contacted-host reputation result means the reputation cross-check for IPs 8.8.8.8, 18.213.11.84, 23.40.140.168 was not completed; cannot assert clean network behaviour.
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 malicious detections across 76 engines
- Medium prevalence over six years
- No malicious sandbox verdict or files it created
6 sources checked · 5 complete · 1 partial. See every source
Chapter 03
What it did in our test
It ran in our isolated test environment; no test environment rated what it did as risky.
Test run summary
Capture complete- 2sandbox rule tags
- 3spawned processes
- 2network contacts
- 38filesystem & mutex artifacts
What this file did when executed
This file was run in a sandbox and its runtime behaviour was observed.
Techniques observed in the sandbox
2MITRE ATT&CK techniques the sandbox mapped. Highlighted ones are rare in normal software; the others are common in legitimate programs too.
- T1036
- T1082· System recon
Observed activity
Processes started
3Programs the file ran, with their command lines.
RdrCEF.exec:\program files (x86)\adobe\acrobat reader dc\reader\acrocef_1\RdrCEF.exe --backgroundcolor=16514043ProgramC:\Program Files (x86)\Adobe\Acrobat Reader DC\Reader\AcroRd32.exe" "C:\Users\user\Desktop\PDF documentRdrCEF.exe"C:\Program Files (x86)\Adobe\Acrobat Reader DC\Reader\AcroCEF\RdrCEF.exe" --backgroundcolor=16514043
Network contacts
22 hosts, listed as 2 addresses. Links show the host and path only.
- IP address
18.213.11.84 - IP address
23.40.140.168
Files
30Files the file created, changed or deleted.
- Written
C:\Users\<USER>\AppData\Local\Adobe\Acrobat\DC\SOPHIA\Reader\SOPHIA.json - Written
C:\Users\<USER>\AppData\Local\Adobe\Acrobat\DC\SOPHIA\Reader\Files\TESTING - Written
Local\080F5200 - Written
Local\06231560 - Written
Local\06232028 - Written
Local\080F5CC8
Show all 30 entries for files
- Written
Local\080F3820 - Written
Local\0831CFF0 - Written
Local\0831CDC8 - Written
C:\Users\<USER>\AppData\Local\Adobe\Acrobat\DC\UserCache.bin - Written
C:\Users\<USER>\AppData\LocalLow\Adobe\Acrobat\DC\ConnectorIcons\icon-240324234447Z-692.bmp - Written
Local\0827D210 - Written
Local\0827E128 - Written
Local\0831C528 - Written
Local\04DB1A00 - Deleted
C:\Users\<USER>\AppData\Local\Adobe\Acrobat\DC\SOPHIA\Reader\Files\DC_READER_LAUNCH_CARD - Deleted
C:\Users\<USER>\AppData\Local\Adobe\Acrobat\DC\SOPHIA\Reader\Files\ACROBAT_READER_MASTER_SURFACEID - Deleted
C:\Users\<USER>\AppData\LocalLow\Adobe\Acrobat\DC\ReaderMessages-journal - Deleted
C:\Users\<USER>\AppData\Local\Temp\A9eyajhp_1okxo5y_26w.tmp - Deleted
C:\Users\<USER>\AppData\Local\Temp\A91177bi8_1okxo5z_26w.tmp - Deleted
C:\Users\<USER>\AppData\Local\Temp\A91lftuwf_1okxo60_26w.tmp - Deleted
C:\Users\<USER>\AppData\Local\Temp\A9853p50_1okxo61_26w.tmp - Deleted
C:\Users\<USER>\AppData\Local\Temp\A91yz7xm3_1okxo62_26w.tmp - Deleted
C:\Users\<USER>\AppData\Local\Temp\A9y1q3nh_1okxo63_26w.tmp - Deleted
C:\Users\<USER>\AppData\Local\Temp\A91924omr_1okxo64_26w.tmp - Deleted
C:\Users\<USER>\AppData\Roaming\Adobe\Acrobat\DC\JSCache\GlobSettings - Deleted
C:\Users\user\AppData\LocalLow\Adobe\AcroCef\DC\Acrobat\Cache\Code Cache\js\05349744be1ad4ad_0 - Deleted
C:\Users\user\AppData\LocalLow\Adobe\AcroCef\DC\Acrobat\Cache\Code Cache\js\0786087c3c360803_0 - Deleted
C:\Users\user\AppData\LocalLow\Adobe\AcroCef\DC\Acrobat\Cache\Code Cache\js\0998db3a32ab3f41_0 - Deleted
C:\Users\user\AppData\LocalLow\Adobe\AcroCef\DC\Acrobat\Cache\Code Cache\js\0ace9ee3d914a5c0_0
Registry and auto-start
4Settings the file changed, including ways to start again after a restart.
- Deleted
HKEY_LOCAL_MACHINE\System\Acrobatviewercpp473 - Deleted
HKEY_CURRENT_USER\Software\Adobe\Acrobat Reader\DC\AVGeneral\cRecentFiles - Deleted
HKEY_CURRENT_USER\Software\Adobe\Acrobat Reader\DC\AVGeneral\cRecentFiles\c1 - Deleted
HKEY_LOCAL_MACHINE\SYSTEM\Acrobatbrokerserverdispatchercpp789
Mutexes
8Named locks a program uses so only one copy runs; malware families often reuse them.
Local\Acrobat Instance MutexDBWinMutex\Sessions\1\BaseNamedObjects\{100184D2-BDC3-477a-B8D3-65548B67914C}_6920\Sessions\1\BaseNamedObjects\Local\{100184D2-BDC3-477a-B8D3-65548B67914C}_6996\Sessions\1\BaseNamedObjects\Local\Acrobat Instance Mutex\Sessions\1\BaseNamedObjects\Global\{100184D2-BDC3-477a-B8D3-65548B67914C}_7016
Show all 8 entries for mutexes
\Sessions\1\BaseNamedObjects\com.adobe.acrobat.rna.RdrCefBrowserLock.DC\Sessions\1\BaseNamedObjects\DBWinMutex
Sandbox background — not the file
1The analysis machine's own processes and connections, recorded in every run.
- VM host
8.8.8.8
Files this sample writes at runtime
This file drops 7 children at runtime. None are currently flagged malicious in our cache. 7 have no saved verdict and were not checked; that is missing coverage, not a finding.
- 37c73c1a4e115fbc2ca5…96d852Not checkedno saved verdict
- 102e00a38e471613d085…822948Not checkedno saved verdict
- c315b34e3ab465f9cb5d…cc76e3Not checkedno saved verdict
- e089ddbb841eef930c37…902ae6Not checkedno saved verdict
- 348b85c085a3f320d3cc…f153d3Not checkedno saved verdict
- a67103485f6ff80eae22…303d78Not checkedno saved verdict
- 637d06de23cc8f9feb72…6cd482Not checkedno saved verdict
Chapter 04
Technical details
None of the 61 antivirus engines that checked it flag it.
Sources checked
Every check behind this verdict
6 sources checked · 5 complete · 1 partial. Complete means the check returned a usable result; it does not mean the file is safe.
File fingerprint
- File name
- PDF document
- Format
- Size
- 599.8 kB
- Code signing
- Not applicable to this file type
- Last analyzed
- Aug 26, 2026, 7:49 PM UTC
- SHA-256
c8a2fe5dd9f49501e5a2ae00496caf6289d490c25ee14897d4d21e6b2c852ee4- SHA-1
cb2d0d502ad9bc5cefc1ea4d916031782e4bc46e- MD5
9ab2de103c4ea432077a5b8435f3ca5d
First scanned
Antivirus consensus
0 of 61 engines flagged this file
15 of the 76 engines returned no result for this file (file type not supported, or the scan did not finish), so they did not check it.
- Tier-118 engines0flagged
- Tier-233 engines0flagged
- Low-trust10 engines0flagged
View all 76 engine results
- AcronisClean
- AhnLab-V3Clean
- AlibabaNo result
- alibabacloudNo result
- ALYacClean
- Antiy-AVLClean
- APEXNo result
- ArcabitClean
- AvastClean
- Avast-MobileNo result
- AVGClean
- AviraClean
- BaiduClean
- BitDefenderClean
- BitDefenderFalxNo result
- BitDefenderThetaClean
- BkavClean
- CAT-QuickHealClean
- ClamAVClean
- CMCClean
- CrowdStrikeNo result
- CybereasonNo result
- CylanceNo result
- CynetClean
- DeepInstinctNo result
- DrWebClean
- ElasticNo result
- EmsisoftClean
- ESET-NOD32Clean
- F-SecureClean
- FireEyeClean
- FortinetClean
- GDataClean
- GoogleClean
- GridinsoftClean
- IkarusClean
- JiangminClean
- K7AntiVirusClean
- K7GWClean
- KasperskyClean
- KingsoftClean
- LionicClean
- MalwarebytesClean
- MAXClean
- MaxSecureClean
- McAfeeClean
- MicrosoftClean
- MicroWorld-eScanClean
- NANO-AntivirusClean
- PaloaltoNo result
- PandaClean
- RisingClean
- SangforClean
- SentinelOneClean
- SkyhighClean
- SophosClean
- SUPERAntiSpywareClean
- SymantecClean
- SymantecMobileInsightNo result
- TACHYONClean
- tehtrisNo result
- TencentClean
- TrapmineNo result
- TrendMicroClean
- TrendMicro-HouseCallClean
- TrustlookNo result
- VaristClean
- VBA32Clean
- VIPREClean
- VirITClean
- ViRobotClean
- XcitiumClean
- YandexClean
- ZillyaClean
- ZoneAlarmClean
- ZonerClean
How widely this file has been seen
Moderate prevalence — neither rare nor common. No strong prior applies.
Chapter 05
Questions & answers
Short answers to the 6 questions people ask most about this file.
Is this PDF document safe?
What is this PDF document?
How many antivirus engines detected this PDF document?
What is the SHA-256 hash of this PDF document?
Is it safe to open this PDF document?
How up to date is this analysis of this PDF document?
Community
Member reviews and reports for this exact file hash.