Malicious PDF — malware analysis report

Static analysis result for SHA-256 15b5b35e8d6ab2ca…

MALICIOUS

PDF

100.7 KB
MD5: b03b39040ba55af46c34c3248403453c SHA-1: c330794faca3ed6df9798e790c5c1189d35c16e2 SHA-256: 15b5b35e8d6ab2cac2c90f3f769e592e491c583450320486fb0d3a26afb97472
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 appears designed to download and execute a second-stage payload. The ML classifier and ClamAV detection 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_00000246.bin
77762b06c6b4a430505eaca4662a3b53b5dc56f87302a26cfe5fc0c13bc09ebf		 pdf-embedded-script PDF raw stream script payload at offset 0x246 102345 bytes

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