Win.Trojan.Agent-36166 — PDF malware analysis

Static analysis result for SHA-256 f5dab9dd212cc1f0…

MALICIOUS

PDF

14.3 KB Created: 2009-11-15 19:41:70 Authoring application: PDF Library 4.3.9 (via PDF Library 3.9.7)
MD5: df52c390433ed61062222d3843b0b169 SHA-1: 707d3684049b54876cd4cf5de5329915a408d7cc SHA-256: f5dab9dd212cc1f037cd9da935c717675089226a5acca06bb30dc5e8ffcf2cd4
166 Risk Score

Malware Insights

Win.Trojan.Agent-36166 · confidence 98%

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

The PDF was flagged by multiple heuristics, including a critical ClamAV detection identifying it as 'Win.Trojan.Agent-36166'. Embedded JavaScript was also detected, indicating the likely execution of malicious code. The ML classifier strongly supports the malicious verdict. The primary IOC is the ClamAV detection name.

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
d6bed323d807ad3d7eb21c5b4f6db958d8fe5ceea09a18ee0dc248ffffa2754c		 pdf-javascript-stream PDF /JS object 7 at offset 0x1A5 74676 bytes
Detection
ClamAV: Win.Trojan.Agent-36166
Obfuscation or payload: unlikely

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