Malicious PDF — malware analysis report

Static analysis result for SHA-256 119c86857011f7cb…

MALICIOUS

PDF

79.4 KB
MD5: c867c3309da5293ebb2517bccd0a3815 SHA-1: 069aedff23cbe4a301bbcb91c546987a8a77291f SHA-256: 119c86857011f7cbdccdef26ae22cb44e09e3e6518528dfd3f5a16ebcb40a049
108 Risk Score

Malware Insights

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

The PDF file contains an XFA form with embedded JavaScript, flagged by multiple heuristics including ClamAV and an ML classifier. The embedded script is heavily obfuscated but appears to be designed to execute code, likely downloading a second-stage payload. The presence of XFA and embedded scripts points to exploitation for client execution, with spearphishing attachment being the likely initial access vector.

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_0000023c.bin
de59986e3ea33fe1cd6c7b04f642e7a9f31103e5008f55d5ce6035c384dcc4b5		 pdf-embedded-script PDF raw stream script payload at offset 0x23C 80622 bytes

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