Malicious PDF — malware analysis report

Static analysis result for SHA-256 6ee29ee8015167fe…

MALICIOUS

PDF

14.2 KB Created: 2009-11-15 19:41:70 Authoring application: PDF Library 4.3.9 (via PDF Library 3.9.7)
MD5: 0f9f8fd0df680fa6f6204db0ccabcc05 SHA-1: 3740107b58f279ce6d181ff02a1d52abd67147ae SHA-256: 6ee29ee8015167fe2cecaaa16eb57a09e7109060ce728c36bdfe4f8e3ebe6c99
166 Risk Score

Malware Insights

MITRE ATT&CK
T1059.007 JavaScript T1566.001 Spearphishing Attachment

The PDF file contains embedded JavaScript, identified by multiple heuristics and ClamAV detection as Win.Trojan.Agent-36166. The JavaScript is heavily obfuscated but appears to be designed to download and execute a second-stage payload, a common technique for malware distribution. The presence of JavaScript actions and embedded JS streams strongly suggests malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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
71f400f08e82133b875e02dd35bdd22290326cf69a93f6e9c36d259e969cb36d		 pdf-javascript-stream PDF /JS object 7 at offset 0x1A5 74281 bytes
Detection
ClamAV: Win.Trojan.Agent-36166
Obfuscation or payload: unlikely

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