Malicious PDF — malware analysis report

Static analysis result for SHA-256 ece6c5ec355b74d0…

MALICIOUS

PDF

14.6 KB Created: 2009-11-15 19:41:70 Authoring application: PDF Library 4.3.9 (via PDF Library 3.9.7)
MD5: 77da970453951f508113f77056a9d412 SHA-1: 667723a229c564ef0a887941bdd0bf1f855fbb5c SHA-256: ece6c5ec355b74d0f2d0a2c92e5b710d267b37034929c87cf23c9d001aa1c80a
136 Risk Score

Malware Insights

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

The PDF file contains embedded JavaScript, indicated by the PDF_JAVASCRIPT and PDF_JS heuristics. ClamAV detections (Pdf.Dropper.Agent-7320749-0 and Win.Trojan.Agent-36166) confirm its malicious nature. The embedded JavaScript is likely responsible for downloading and executing a secondary payload, a common technique for dropper malware. The file's SHA256 hash is ece6c5ec355b74d0f2d0a2c92e5b710d267b37034929c87cf23c9d001aa1c80a.

Heuristics 4

  • ClamAV: Pdf.Dropper.Agent-7320749-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Dropper.Agent-7320749-0
  • 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
745d879474fef3a611949713f72a101ce4254fa784e29e449fa1be5d6a44592f		 pdf-javascript-stream PDF /JS object 7 at offset 0x1A5 75472 bytes
Detection
ClamAV: Win.Trojan.Agent-36166
Obfuscation or payload: unlikely

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