Malicious PDF — malware analysis report

Static analysis result for SHA-256 91b611080cfc608f…

MALICIOUS

PDF

111.2 KB
MD5: eccc91702777885b9a590eed09c16801 SHA-1: 82be6f8ea046c675cd6f96a75e0af84a04dbe8c3 SHA-256: 91b611080cfc608f4ad22aea94cc0de7a88c38405e9674897a265d7d5388dc0d
120 Risk Score

Malware Insights

MITRE ATT&CK
T1059.001 PowerShell

The PDF was flagged by multiple high-confidence heuristics, including a critical ClamAV detection for 'Pdf.Exploit.Agent-6136306-0' and an ML classifier indicating maliciousness with a score of 0.999991. The presence of an XFA form and an embedded script payload suggests an exploit is being delivered. The embedded script is likely responsible for executing the malicious payload, although its specific actions are not detailed in the provided evidence.

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_0000026a.bin
ec44f23faf533574d212c1d27dab2fc5c609272af59c49925fb1415e44e27cde		 pdf-embedded-script PDF raw stream script payload at offset 0x26A 113195 bytes

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