Malicious PDF — malware analysis report

Static analysis result for SHA-256 eb1db38e53b49313…

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: bb76aaa6224c24099f5c17e1737e0e70 SHA-1: 8f2ba514e9a49c742f666be2e462cf513db09fa0 SHA-256: eb1db38e53b49313b6b9ae2f500c2567b4efaa090095e3db450f4c2f88a1cd30
136 Risk Score

Malware Insights

MITRE ATT&CK
T1059.001 JavaScript/JScript

The PDF file contains embedded JavaScript, indicated by multiple heuristic firings. ClamAV detections (Win.Trojan.Agent-36166) confirm the malicious nature of the file. The embedded JavaScript is likely responsible for executing the malicious payload, although its specific actions are not detailed in the provided evidence.

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
b5aa858b3c58e89737cfe68e3b101e866c3e1409f0ecaffef4c299c3415e5fd6
pdf-javascript-stream PDF /JS object 7 at offset 0x1A5 74804 bytes
Detection
ClamAV: Win.Trojan.Agent-36166
Obfuscation or payload: unlikely