Malicious PDF — malware analysis report

Static analysis result for SHA-256 396c95fd198da1c2…

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: 1b9572c424e7f38db6ed13079ceaf769 SHA-1: f98da5215ee9c3976813c2da1519c32ffd28928f SHA-256: 396c95fd198da1c2c9f4b3abd645cce4c2a2f9b3cae2fb407ba276b42205d4fc
136 Risk Score

Malware Insights

MITRE ATT&CK
T1059.001 PowerShell

The file is a PDF containing embedded JavaScript, as indicated by the PDF_JAVASCRIPT and PDF_JS heuristics. The ClamAV detection of 'Win.Trojan.Agent-36166' strongly suggests malicious intent. The embedded JavaScript is likely responsible for executing malicious actions, such as downloading further payloads or exploiting vulnerabilities within the PDF reader. Due to the nature of the embedded script and the ClamAV detection, the confidence in this assessment is high.

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
d9bd916576a80c96e4912eeee9180beb27a0d3ebea072656df18e2112bfff9f2		 pdf-javascript-stream PDF /JS object 7 at offset 0x1A5 74821 bytes
Detection
ClamAV: Win.Trojan.Agent-36166
Obfuscation or payload: unlikely

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