Malicious PDF — malware analysis report

Static analysis result for SHA-256 97e8f7bafa17196e…

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: a4c085cf556a927092231baeb9e4ef01 SHA-1: e4efbcc3b11c7fb12dcbf3a45e5f606c7023ecb7 SHA-256: 97e8f7bafa17196e8e22c9ef6ad7dfd8c22dbf9dc25e6a432c92212b1fe91657
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 detections confirm its malicious nature, identifying it as 'Win.Trojan.Agent-36166'. The embedded JavaScript is likely responsible for exploiting a vulnerability within the PDF reader to execute malicious code, potentially downloading further payloads or establishing a backdoor. The document body is unreadable, providing no further context on the lure.

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
772e49d6ea422636848bab35f6abd4487d28e8efcf3d75cf7d55d94c0101337e		 pdf-javascript-stream PDF /JS object 7 at offset 0x1A5 74838 bytes
Detection
ClamAV: Win.Trojan.Agent-36166
Obfuscation or payload: unlikely

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