Malicious PDF — malware analysis report

Static analysis result for SHA-256 26fa22c8a923b2d0…

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: 28888c05c8e3823e760325a2ba2f5342 SHA-1: 64aea6aefeacf4e45f58180e818fe358b1ed02f8 SHA-256: 26fa22c8a923b2d02d4aafbef9388a60951b3127637f803b6760cc7ca4fecbbc
136 Risk Score

Malware Insights

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

The file is identified as malicious by ClamAV with the signature Win.Trojan.Agent-36166. Static analysis detected embedded JavaScript within the PDF, indicating an attempt to exploit vulnerabilities or execute arbitrary code. The presence of JavaScript actions and streams strongly suggests that the primary function of this PDF is to serve as a dropper or downloader for additional malware. The document body is unreadable, providing no further context on the lure.

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
62e6a0a91f1490cd409af2eaf721e576629102fc82e5a15d7a0326f605f8d883		 pdf-javascript-stream PDF /JS object 7 at offset 0x1A5 74896 bytes
Detection
ClamAV: Win.Trojan.Agent-36166
Obfuscation or payload: unlikely

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