Malicious PDF — malware analysis report

Static analysis result for SHA-256 98353d1a9552bd71…

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: 9dc245206edaa82de4c3d0642aa2374e SHA-1: 4b20b93ade47a17a84eea032cacd815a18c3594a SHA-256: 98353d1a9552bd71b1d6824d07617fbe3f9916a8a9839b181c9b2e451a11ceb2
136 Risk Score

Malware Insights

MITRE ATT&CK
T1059.001 PowerShell

The PDF file was flagged by ClamAV as Win.Trojan.Agent-36166. Static analysis revealed embedded JavaScript, indicating a likely attempt to download and execute a secondary payload. The heuristics for PDF_JAVASCRIPT and PDF_JS further support the presence of malicious JavaScript within the document.

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
d76a13c289f172c53a0d274de82e043e943b97eb1a6986848ec75d57ca15fefe		 pdf-javascript-stream PDF /JS object 7 at offset 0x1A5 75199 bytes
Detection
ClamAV: Win.Trojan.Agent-36166
Obfuscation or payload: unlikely

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