Malicious PDF — malware analysis report

Static analysis result for SHA-256 ae0d2e384e53561e…

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: 61468a4ec67c6af8a87ad0db3e69c889 SHA-1: 6098c121dd4a1ac68a5ca06352c2540b13af1c0d SHA-256: ae0d2e384e53561e216c794f35927277f5791f5a8efdf7f758a0e63ed86a7e55
136 Risk Score

Malware Insights

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

The critical ClamAV heuristic firings indicate the file is recognized as 'Win.Trojan.Agent-36166'. The PDF structure contains embedded JavaScript, which is a common technique for delivering malicious payloads. The presence of JavaScript actions and streams strongly suggests that the script is designed to download and execute a second-stage payload, contributing to the overall malicious nature of the document. The SHA256 hash is included as a primary indicator.

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
db96e49cd17fdf33997b133a0b07b94598e1f0857311d128efd76ffd19a45110		 pdf-javascript-stream PDF /JS object 7 at offset 0x1A5 74592 bytes
Detection
ClamAV: Win.Trojan.Agent-36166
Obfuscation or payload: unlikely

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