Malicious PDF — malware analysis report

Static analysis result for SHA-256 85a4781a500ddca6…

MALICIOUS

PDF

96.9 KB
MD5: f505ce47bacf914cfef24e84659bf865 SHA-1: 8cdde3fa3d9f4b02415f83d988b6fa8abcb6c4e9 SHA-256: 85a4781a500ddca63c49a2dd0b26faff092f2e11127b41fa5fc4d3d7a155f826
118 Risk Score

Malware Insights

MITRE ATT&CK
T1059.001 PowerShell

The PDF contains an embedded script payload and is flagged by ML classifiers and ClamAV as malicious. The presence of XFA form elements suggests an exploit targeting PDF reader vulnerabilities. The embedded script is likely responsible for downloading and executing a second-stage payload, though its exact functionality is obscured.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • ClamAV: Pdf.Exploit.Agent-6136306-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Exploit.Agent-6136306-0
  • Embedded script payload in PDF stream medium PDF_EMBEDDED_SCRIPT_PAYLOAD
    PDF stream bytes contain an HTML/XFA <script> tag without accompanying Windows shell-execution primitives — common in accessible XFA forms but worth surfacing for analyst review.
  • XFA form low PDF_XFA
    PDF uses XML Forms Architecture — can contain script logic
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL http://ns.adobe.com/xdp/
    • http://www.xfa.org/schema/xfa-template/2.5/
    • http://www.xfa.org/schema/xfa-data/1.0/

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
embedded_pdf_script_0000026c.bin
35ff55a576709f776447a569257b75ea84ad871a78e263bef424a861de93dda0		 pdf-embedded-script PDF raw stream script payload at offset 0x26C 98551 bytes

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