Win.Trojan.Agent-36166 — PDF malware analysis

Static analysis result for SHA-256 233a76bd9e8a5714…

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: 2eee71c21038557f5d0a0b6bdbda3a15 SHA-1: 4ee5cac12fda3ced0ae6de20048acd6cbd685a35 SHA-256: 233a76bd9e8a571482ac041a8e38da928257365b7c8d9627e36512999b939ec0
136 Risk Score

Malware Insights

Win.Trojan.Agent-36166 · confidence 95%

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

The PDF file was detected by ClamAV as Win.Trojan.Agent-36166, indicating it is a known Windows Trojan. The presence of embedded JavaScript, identified by PDF_JAVASCRIPT and PDF_JS heuristics, suggests the script is responsible for the malicious payload delivery or execution. The extracted artifact name 'javascript_obj0007_000.js' further supports the use of JavaScript for malicious purposes.

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
418aea154200334a1373e7a43d8f51ec6e0366ab77cd7cc56e2d76d57896906a		 pdf-javascript-stream PDF /JS object 7 at offset 0x1A5 74413 bytes
Detection
ClamAV: Win.Trojan.Agent-36166
Obfuscation or payload: unlikely

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