Malicious PDF — malware analysis report

Static analysis result for SHA-256 61c32e4251f9db96…

MALICIOUS

PDF

100.5 KB
MD5: e2ac43f726d8a03c8b8e0bb84466aaea SHA-1: 9e7f91d476f620e1949c6ed4e6cce64de76b8121 SHA-256: 61c32e4251f9db96c8f1c6cd8f1bdb13d57213c51768fea4cb160a2541151dde
108 Risk Score

Malware Insights

MITRE ATT&CK
T1059.007 JavaScript T1566.001 Spearphishing Attachment

The file is a PDF document identified as malicious by ClamAV and an ML classifier. It contains an embedded JavaScript payload within an XFA form, which is a common technique for exploiting PDF vulnerabilities. The script is heavily obfuscated but appears designed to download and execute a second-stage payload, indicated by the heuristic firings and the nature of XFA exploits. No specific family could be confidently identified.

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
  • XFA form low PDF_XFA
    PDF uses XML Forms Architecture — can contain script logic
  • Embedded script payload in PDF stream low 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.
  • 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_00000246.bin
699a99c466911480931679b098986ab7f1139ab5a76c70e85abdc55bebb0d13e		 pdf-embedded-script PDF raw stream script payload at offset 0x246 102152 bytes

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