Malicious PDF — malware analysis report

Static analysis result for SHA-256 39371f816d53acb0…

MALICIOUS

PDF

100.5 KB
MD5: 043ec2723e176aa9534c2f8354d725d7 SHA-1: fe448a93c1432ec438e684e546a405306a27b543 SHA-256: 39371f816d53acb0a49dfe95834cc78fe83161ce34f8795a1f4490747a4104d9
118 Risk Score

Malware Insights

MITRE ATT&CK
T1204.002 Malicious File T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF file contains an embedded script payload and utilizes XFA forms, which are known vectors for exploitation. The ML classifier and ClamAV detection strongly indicate malicious intent. The embedded script is likely responsible for downloading and executing a second-stage payload, although its exact functionality is obscured by the PDF stream.

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
2a8f55a174b56c2e8e84a7f0077529a59b7c0f386c61f0e5006ea6a8db0c3356		 pdf-embedded-script PDF raw stream script payload at offset 0x246 102150 bytes

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