Malicious PDF — malware analysis report

Static analysis result for SHA-256 db92463a40da3180…

MALICIOUS

PDF

14.5 KB Created: 2009-11-15 19:41:70 Authoring application: PDF Library 4.3.9 (via PDF Library 3.9.7)
MD5: 6ebd585a1c6460f277190c6d0d4bc039 SHA-1: 7870e20bce7a774c1eaaa6d59388f4a8c3875b3e SHA-256: db92463a40da3180c19e7ad00f58abc22fb30dd4fa3ce9eeaaa74ff63db996a8
136 Risk Score

Malware Insights

MITRE ATT&CK
T1059.001 PowerShell

The PDF file was detected as malicious by ClamAV with the signature Win.Trojan.Agent-36166. Static analysis revealed embedded JavaScript, indicating a potential for malicious code execution. The JavaScript is likely responsible for downloading and executing a secondary payload, which is a common technique for malware delivery. Due to the lack of specific indicators in the document body and the obfuscated nature of the embedded script, the exact family could not be determined.

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
3f839af9ca18b34d7ae1b032ab9d32de11ec3763a13f05f1453e989b186a6f90		 pdf-javascript-stream PDF /JS object 7 at offset 0x1A5 74810 bytes
Detection
ClamAV: Win.Trojan.Agent-36166
Obfuscation or payload: unlikely

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