Malicious PDF — malware analysis report

Static analysis result for SHA-256 546505444ccff931…

MALICIOUS

PDF

12.5 KB
MD5: 3b2de4a0db473846e57367b9fda5174f SHA-1: dc1bb9698f1a9a249f48ad75f4ee74ddbf66e328 SHA-256: 546505444ccff931e1a38cd1d8ac23e843bbfb7b3750219037ed69446e0327a3
136 Risk Score

Malware Insights

MITRE ATT&CK
T1204.002 Malicious File: User Execution: Malicious File

The file is a PDF containing embedded JavaScript, indicated by multiple heuristic firings and the presence of an extracted JS file. ClamAV detections 'Pdf.Exploit.Agent-36365' and 'Pdf.Exploit.Agent-36364' strongly suggest this is a malicious PDF exploiting a vulnerability. The embedded JavaScript is the likely mechanism for delivering a secondary stage, although its specific actions are not detailed in the provided evidence.

Heuristics 4

  • ClamAV: Pdf.Exploit.Agent-36365 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Exploit.Agent-36365
  • 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_obj0076_000.js
ac6aa67c231a3d1e257f9688e092131f5f3838dbc8fe9ffd2f9830a1176f28ca		 pdf-javascript-stream PDF /JS object 76 at offset 0x369 11671 bytes
Detection
ClamAV: Pdf.Exploit.Agent-36364
Obfuscation or payload: unlikely

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