Malicious PDF — malware analysis report

Static analysis result for SHA-256 83ed54e51e170f39…

MALICIOUS

PDF

11.3 KB
MD5: 91666fdf21867fb21aa3b158e46d1084 SHA-1: 46355d6d7dd18687a5b9c83016f7e84608b32656 SHA-256: 83ed54e51e170f398655dd0fddbe7688e188221288088cfad701cfb81e70c937
106 Risk Score

Malware Insights

MITRE ATT&CK
T1059.007 JavaScript T1203 Exploitation for Client Execution T1566.001 Spearphishing Attachment

The PDF file contains embedded JavaScript, flagged by multiple heuristics and a critical ClamAV detection (Pdf.Exploit.Agent-36177). The JavaScript function 'dskp' decodes a string that is then executed, likely downloading and running a secondary payload. This pattern is characteristic of exploit-laden PDFs designed to compromise the user's system.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • ClamAV: Pdf.Exploit.Agent-36177 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Exploit.Agent-36177
  • 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
a7e6203b0e8f812879ed8382ccbb3900ad81b5a92faf27692f51de6e8c96c13a		 pdf-javascript-stream PDF /JS object 7 at offset 0x1A6 569 bytes

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