Malicious PDF — malware analysis report

Static analysis result for SHA-256 8a74caa34e4c4828…

MALICIOUS

PDF

14.5 KB Created: 2009-11-15 19:41:70 Authoring application: PDF Library 4.3.9 (via PDF Library 3.9.7)
MD5: 32e83a8cd3a9bfc12f0e54918ef89572 SHA-1: e2f574d5137e02cfc636448fa502ee2a7092b669 SHA-256: 8a74caa34e4c48285e5663efba6d4118c7a28ab77a997a81957867d03a9afd0c
136 Risk Score

Malware Insights

MITRE ATT&CK
T1059.001 PowerShell

The PDF file was flagged by ClamAV as Win.Trojan.Agent-36166, indicating a known malicious signature. Heuristics indicate the presence of embedded JavaScript, which is often used to download and execute further malicious content. The JavaScript stream is a significant indicator of malicious intent, likely serving as a dropper for additional malware.

Heuristics 4

  • ClamAV: Win.Trojan.Agent-36166 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Win.Trojan.Agent-36166
  • 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.
  • 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.

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
javascript_obj0007_000.js
2f54fbc99e25575a4c915d90409228254fba5fe5ead0cdc173fb78938ed38dd6
pdf-javascript-stream PDF /JS object 7 at offset 0x1A5 74983 bytes
Detection
ClamAV: Win.Trojan.Agent-36166
Obfuscation or payload: unlikely