Malicious PDF — malware analysis report

Static analysis result for SHA-256 f4276ecd204903bc…

MALICIOUS

PDF

12.4 KB
MD5: 59941053af422032915c8e9fafc5f39f SHA-1: 050aaab02b7ea0218dbaba1b740f91009199eee4 SHA-256: f4276ecd204903bcb14d9232049c1ee4b4c4aa378c64bd22f3711750d4976883
136 Risk Score

Malware Insights

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

The PDF file contains embedded JavaScript, indicated by multiple heuristics and the presence of an extracted JavaScript file. ClamAV detections 'Pdf.Exploit.Agent-36722' and 'Pdf.Exploit.Pdfka-9' strongly suggest this is a malicious PDF exploiting a known vulnerability. The embedded JavaScript is the likely mechanism for delivering a secondary stage, though its specific actions are not detailed in the provided evidence.

Heuristics 4

  • ClamAV: Pdf.Exploit.Agent-36722 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Exploit.Agent-36722
  • 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
a6e6dac8910e0ad4196375ef70ed718d7638bb9d915a4d9974837bfe1d11fb7e		 pdf-javascript-stream PDF /JS object 76 at offset 0x369 11554 bytes
Detection
ClamAV: Pdf.Exploit.Pdfka-9
Obfuscation or payload: unlikely

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