Malicious PDF — malware analysis report

Static analysis result for SHA-256 49aab0f67285fe5b…

MALICIOUS

PDF

100.5 KB
MD5: 29a744f57d92bcdfb08e51c61c2a613a SHA-1: 59c3a4911816b2170e11d693b7fe7a1497aa06fc SHA-256: 49aab0f67285fe5bec12fb0fa03d58df19f8a972c8d070292a8bed9221765ed5
120 Risk Score

Malware Insights

MITRE ATT&CK
T1204 Malicious File T1204.002 Malicious File: User Execution: Malicious Attachment

The PDF file utilizes XFA forms, a known vector for embedding malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent. The embedded script payload, though not directly readable due to its nature, is the likely mechanism for exploitation, potentially leading to the download and execution of a second-stage payload. The embedded URLs are likely related to the XFA form functionality.

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_00000246.bin
ac4fc69c219fa8e72ee0a8a1798e2c0e384bc82ef4cdfcb9580dc2109b57d47f		 pdf-embedded-script PDF raw stream script payload at offset 0x246 102150 bytes

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