Malicious PDF — malware analysis report

Static analysis result for SHA-256 afbb367608742225…

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: 51c9e53b352c7141009315e7a07e9062 SHA-1: e89fd250f8904b659db66df0e138cad2e9d068e7 SHA-256: afbb367608742225850a3a7787f680c11a267ee3b2fb7fe6e67441fb927c6b7e
136 Risk Score

Malware Insights

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

The PDF contains embedded JavaScript, indicated by the PDF_JAVASCRIPT and PDF_JS heuristics. ClamAV detections identify it as a dropper, specifically 'Pdf.Dropper.Agent-7293468-0' and an extracted artifact 'Win.Trojan.Agent-36166'. This suggests the JavaScript is likely responsible for downloading and executing a secondary malicious payload.

Heuristics 4

  • ClamAV: Pdf.Dropper.Agent-7293468-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Dropper.Agent-7293468-0
  • 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
ad98955ab8ed54c77f408bd9b2301079e1ab40a37020a762c86fb33e2efe545b		 pdf-javascript-stream PDF /JS object 7 at offset 0x1A5 74616 bytes
Detection
ClamAV: Win.Trojan.Agent-36166
Obfuscation or payload: unlikely

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