Malicious PDF — malware analysis report

Static analysis result for SHA-256 ac219e328103a7f8…

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: 512c776f60824e03778bc4da9186e86a SHA-1: e45d090796b4f44133579665d399686fb5d28b36 SHA-256: ac219e328103a7f886b11915447c45230d9fe27feb57a8c11128d576017764cd
136 Risk Score

Malware Insights

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

The PDF file contains embedded JavaScript, indicated by the PDF_JAVASCRIPT and PDF_JS heuristics. ClamAV detections (Win.Trojan.Agent-36166) confirm its malicious nature. The embedded JavaScript is likely responsible for downloading and executing a second-stage payload, although the exact functionality is obscured. The SHA256 hash is provided as a primary IOC.

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
e481cc09163bb097a0b813fed20e5e58342e78fb267f4efb2b045e2692703d65
pdf-javascript-stream PDF /JS object 7 at offset 0x1A5 74383 bytes
Detection
ClamAV: Win.Trojan.Agent-36166
Obfuscation or payload: unlikely