Malicious PDF — malware analysis report

Static analysis result for SHA-256 a3b8c5fac40c1bb9…

MALICIOUS

PDF

100.5 KB
MD5: f8e4715081ed6e680a91483ae39aec75 SHA-1: df417cc4e4aea22a5cf4bf141da0db109818f8cb SHA-256: a3b8c5fac40c1bb9bd04c966b6d15adbe6dae6ce54615ce35b4e2095ffa59bc3
118 Risk Score

Malware Insights

MITRE ATT&CK
T1059.001 PowerShell T1204.002 Malicious File

The PDF was flagged by a machine learning classifier and ClamAV as malicious, specifically identifying it as an XFA exploit. The presence of an embedded script payload within a PDF stream indicates an attempt to execute malicious code. While the exact script functionality is not detailed, the overall pattern suggests the exploitation of XFA forms to deliver a secondary payload.

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
4bf6dd58495efe77e0478ce2109bd4b858977b1d22a43e06c7f06d65a427e48c		 pdf-embedded-script PDF raw stream script payload at offset 0x246 102237 bytes

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