Malicious PDF — malware analysis report

Static analysis result for SHA-256 75e4e181ec2be9ae…

MALICIOUS

PDF

79.4 KB
MD5: fa34fecb12e7f7eb3d3817a88e315f6e SHA-1: 437b6dbb49b9f7845d05ed04d9c0c9638d163054 SHA-256: 75e4e181ec2be9ae7bde4dc715cf5026c90c1bf3b91a90a1df237424c03153f3
108 Risk Score

Malware Insights

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

The PDF utilizes XFA (XML Forms Architecture) and contains an embedded JavaScript payload. This script is heavily obfuscated but its structure suggests it is designed to download and execute a secondary payload. The ClamAV detection and ML classifier strongly indicate malicious intent, likely delivered via spearphishing.

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
a9248d2e2f0db6e497be60e3cc16382bdd686354b6d66cefd68c3683e7163056		 pdf-embedded-script PDF raw stream script payload at offset 0x23C 80622 bytes

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