Malicious PDF — malware analysis report

Static analysis result for SHA-256 956fdb83350755a2…

MALICIOUS

PDF

100.5 KB
MD5: 2219de61d96e660c87b25ae35c0ab1fd SHA-1: f5a6e80c06585bdaa7ab49be8b641cf4a0cceb5b SHA-256: 956fdb83350755a2f7ee694b28bd3a8fc6de4edc751607608854ebdccb93bf5a
180 Risk Score

Malware Insights

MITRE ATT&CK
T1204.002 Malicious File: User Execution: Malicious PDF T1059.001 Command and Scripting Interpreter: PowerShell

The PDF was flagged by multiple high-confidence heuristics, including ClamAV detection (Pdf.Exploit.Agent-6136306-0) and an ML classifier, indicating it contains malicious content. The presence of an XFA form and an embedded script payload strongly suggests an exploit targeting PDF vulnerabilities. While the embedded script itself was not detailed, the overall pattern points to a malicious PDF designed to execute an exploit and likely download a second-stage payload.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • ClamAV: Pdf.Exploit.Agent-6136306-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Exploit.Agent-6136306-0
  • ClamAV detection on extracted artifact critical EXTRACTED_FILE_CLAMAV
    ClamAV flagged at least one file extracted from inside this sample. Even when the wrapping document carries no AV detection of its own, a hit on the carved artifact is a strong indicator the sample is a delivery vehicle.
  • 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
578b46613949d7ee7b923358ed879874df47009e3356b950debd610253e4a123		 pdf-embedded-script PDF raw stream script payload at offset 0x246 102156 bytes
Detection
ClamAV: Pdf.Exploit.Agent-36769
Obfuscation or payload: unlikely

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