Malicious PDF — malware analysis report

Static analysis result for SHA-256 a2f37133471271d0…

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: 792e44135016764be2cad6b5861d1fe1 SHA-1: af00cef4d3a25015919407e3027b129365e9939e SHA-256: a2f37133471271d09b27ca4fc635b7e72ed7127ff8c8fde03f17afd889d7d4d8
136 Risk Score

Malware Insights

MITRE ATT&CK
T1059.001 PowerShell T1204.002 Malicious File

The PDF file contains embedded JavaScript, indicated by the PDF_JAVASCRIPT and PDF_JS heuristics. ClamAV detections (Win.Trojan.Agent-36166) confirm the malicious nature of the file. The embedded JavaScript is likely responsible for executing a malicious payload, contributing to the overall attack. The document body was unreadable, so the rationale is based on the technical findings.

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
38e6b1467e94a1f4784cba9406b270b5ead83880217f2814a86e4e4a40f56bc5
pdf-javascript-stream PDF /JS object 7 at offset 0x1A5 75157 bytes
Detection
ClamAV: Win.Trojan.Agent-36166
Obfuscation or payload: unlikely