Malicious PDF — malware analysis report

Static analysis result for SHA-256 efdbcb660ec2e650…

MALICIOUS

PDF

14.4 KB Created: 2009-11-15 19:41:70 Authoring application: PDF Library 4.3.9 (via PDF Library 3.9.7)
MD5: 6a0e9b8841d6223b5ea5e061507f0e5d SHA-1: 198a89b9819ead8a111ae5854302fe2e95b1a009 SHA-256: efdbcb660ec2e650f47b316f3b7436ba3eef8b376fc6cdc5fdb1ee5115fef398
136 Risk Score

Malware Insights

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

The file is a PDF containing embedded JavaScript, indicated by multiple heuristic firings. ClamAV detection confirms it as 'Win.Trojan.Agent-36166'. The presence of JavaScript actions and streams strongly suggests an attempt to execute malicious code upon opening the PDF, likely exploiting a vulnerability to achieve this. The exact payload or behavior is not discernible from the provided evidence, but the overall pattern points to a malicious PDF dropper.

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
a0dfcc5b2009a60e7f0772b9630480ced6249b7038b9e702a21d249113b200f5		 pdf-javascript-stream PDF /JS object 7 at offset 0x1A5 74799 bytes
Detection
ClamAV: Win.Trojan.Agent-36166
Obfuscation or payload: unlikely

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