Malicious PDF — malware analysis report

Static analysis result for SHA-256 f58cdd1f3425c511…

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: 63f5c1b8857a699c233f3aa1623abd71 SHA-1: ab287fef98292a3d399a596831e16aff0091600a SHA-256: f58cdd1f3425c51171b8789df4a01e02fad481c754017e2fa4cd36464ce1ffc5
136 Risk Score

Malware Insights

MITRE ATT&CK
T1059.001 JavaScript/JScript

The file is identified as malicious by ClamAV with the signature Win.Trojan.Agent-36166. Static analysis detected embedded JavaScript, indicating an attempt to execute code within the PDF. The JavaScript stream is large, suggesting it may download and execute a second-stage payload.

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
8b600bfe6db428dc23625429f75f01b491472eeb4ab06ac2708e411bf1058095		 pdf-javascript-stream PDF /JS object 7 at offset 0x1A5 74292 bytes
Detection
ClamAV: Win.Trojan.Agent-36166
Obfuscation or payload: unlikely

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