Malicious PDF — malware analysis report

Static analysis result for SHA-256 645aa449c93e46e5…

MALICIOUS

PDF

32.2 KB
MD5: 5c15cbb30a4eb63660cce29df6fab422 SHA-1: 7f03137694e06d9017aa60e6fcf1577a9cd1e138 SHA-256: 645aa449c93e46e56774893689edf2fef2bd6eaabde1666d8ab5e5621c9b63d8
276 Risk Score

Malware Insights

MITRE ATT&CK
T1203 Exploitation for Client Execution T1059.007 JavaScript

The PDF document contains an embedded Adobe Flash RichMedia object that exploits CVE-2010-1297. This exploit is designed to execute shellcode, which is present within the decompressed stream. The embedded JavaScript further supports the malicious intent by likely facilitating the exploit execution or payload delivery. ClamAV detection confirms the malicious nature of the file and an extracted artifact.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

Heuristics 8

  • Adobe Flash authplay SWF exploit in PDF — CVE-2010-1297 critical CVE likely CVE_2010_1297_FLASH_RICHMEDIA
    PDF combines RichMedia Flash activation, a crafted SWF with ActionScript prototype/AVM-era markers or the AES-PHP/authplay variant markers, and PDF-side shellcode heap-spray staging. This is the static delivery shape associated with CVE-2010-1297 in Adobe Reader's bundled authplay.dll.
  • ClamAV: Pdf.Exploit.Agent-35955 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Exploit.Agent-35955
  • ClamAV detection on extracted artifact critical EXTRACTED_FILE_CLAMAV
    ClamAV flagged at least one file extracted from inside this sample. Even when the wrapping document carries no AV detection of its own, a hit on the carved artifact is a strong indicator the sample is a delivery vehicle.
  • RichMedia (Flash) high PDF_RICHMEDIA
    PDF contains /RichMedia (Adobe Flash) which is a historic exploit vector
  • JavaScript action low PDF_JAVASCRIPT
    PDF contains a /JavaScript action. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • Embedded file low PDF_EMBEDDED
    PDF embeds a file attachment — could carry an executable or another weaponised document as a nested payload
  • Suspicious extracted artifact info EXTRACTED_FILE_STATIC_TRIAGE
    One or more files extracted from inside this sample matched static suspicious-content checks such as script obfuscation, encoded payload blobs, packed data, or execution/download terms.

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
zTCOVNcEHj.swf
c2b666a3ef4c191b77b78c037656e50477b8ba3d35fd61ae843a3a1f4d41c5c1		 pdf-embedded-file PDF EmbeddedFile object 16 at offset 0x1694 26774 bytes
Detection
ClamAV: Pdf.Exploit.Agent-35955
Obfuscation or payload: likely
Carved artifact entropy is 7.99, consistent with packed or encrypted content.
javascript_obj0006_000.js
69fb64ee971977e3a8452348d45e6448f62f2afce30d4d8027cae532f3825d8b		 pdf-javascript-stream PDF /JS object 6 at offset 0x146 3866 bytes

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