Malicious PDF — malware analysis report

Static analysis result for SHA-256 b16353686e721bc6…

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: 6d07829df6caf8f5a50211f54a2d9d90 SHA-1: 6be6c34f209f7421c5d89b2c0f61bcc6cdf4f8b3 SHA-256: b16353686e721bc6d72daf33c07b97c9fe722acfdcb2ab350c8c6660358e8ed1
136 Risk Score

Malware Insights

MITRE ATT&CK
T1059.001 JavaScript/JScript

The PDF file contains embedded JavaScript, indicated by heuristic firings for PDF_JAVASCRIPT and PDF_JS. ClamAV detections identify it as a dropper, suggesting its primary function is to download and execute additional malware. The extracted artifact also triggered a ClamAV detection for Win.Trojan.Agent-36166, reinforcing its malicious nature as a dropper.

Heuristics 4

  • ClamAV: Pdf.Dropper.Agent-7685816-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Dropper.Agent-7685816-0
  • 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
c2f022a3d2560a2fdee7bbf679fd5a3c4b4c294b9f57ec567dc9392b4bd2c4e0		 pdf-javascript-stream PDF /JS object 7 at offset 0x1A5 74344 bytes
Detection
ClamAV: Win.Trojan.Agent-36166
Obfuscation or payload: unlikely

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