Malicious PDF — malware analysis report

Static analysis result for SHA-256 47eb5a51190dabd1…

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: 977c5efd1a814b43c84052dba40e51bc SHA-1: 983b1026903dafff63801aad4049756506fe940a SHA-256: 47eb5a51190dabd194f0b3f3f9f69f6f8affdbd7f9fed777c4719de7ea8d969b
136 Risk Score

Malware Insights

MITRE ATT&CK
T1059.001 PowerShell

The PDF file was detected as malicious by ClamAV with the signature Win.Trojan.Agent-36166. Static analysis revealed embedded JavaScript, indicating a potential for malicious code execution. The JavaScript stream is likely responsible for downloading and executing a secondary payload, which is a common technique for malware delivery. The confidence is moderate due to the lack of specific details about the JavaScript's functionality beyond its presence and the generic ClamAV detection.

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
1c97869385e5f921fb593cf0032b2ef12f36eb75da4f244957c25cdafab05689		 pdf-javascript-stream PDF /JS object 7 at offset 0x1A5 75155 bytes
Detection
ClamAV: Win.Trojan.Agent-36166
Obfuscation or payload: unlikely

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