Malicious PDF — malware analysis report

Static analysis result for SHA-256 e26be13b65854736…

MALICIOUS

PDF

14.4 KB Created: 2009-11-15 19:41:70 Authoring application: PDF Library 4.3.9 (via PDF Library 3.9.7)
MD5: 67160f8a619ed79faaf0908e0c9ee683 SHA-1: a25e83e70af50e85d621bcca92d096865d09a8d8 SHA-256: e26be13b65854736270190cb464348f9b1dd37c971f9f9537859f6c6f9e38c47
136 Risk Score

Malware Insights

MITRE ATT&CK
T1059.001 JavaScript/JScript

The PDF 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 the payload, leading to the malware detection.

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
f0297acc5e9473a4232294ef25d5ffe411c9d95d1473a41b44c35d4c4baca353
pdf-javascript-stream PDF /JS object 7 at offset 0x1A5 74599 bytes
Detection
ClamAV: Win.Trojan.Agent-36166
Obfuscation or payload: unlikely