Malicious PDF — malware analysis report

Static analysis result for SHA-256 e666cd170a34eaf6…

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: e0251cb9dba54be0bf733ae6ca398d7e SHA-1: c3b2fc52a1f3e844b8a0f284cfab6d23d9debbdd SHA-256: e666cd170a34eaf6cd7441b148a0c34ae6034f7ce69bf45b43328dabea0c112e
166 Risk Score

Malware Insights

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

The sample is a PDF file flagged by ClamAV as 'Pdf.Dropper.Agent-7317390-0' and also detected as 'Win.Trojan.Agent-36166' when extracted. Heuristics indicate the presence of JavaScript actions and embedded JS streams within the PDF, suggesting the document is designed to exploit vulnerabilities and download further malicious content. The ML classifier strongly supports the malicious nature of the file.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

Heuristics 4

  • ClamAV: Pdf.Dropper.Agent-7317390-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Dropper.Agent-7317390-0
  • 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
7755cc943443be8b43b24764bd5715437e417934ea2f64b058da0457464798a1		 pdf-javascript-stream PDF /JS object 7 at offset 0x1A5 74731 bytes
Detection
ClamAV: Win.Trojan.Agent-36166
Obfuscation or payload: unlikely

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