Malicious PDF — malware analysis report

Static analysis result for SHA-256 cbf1ad8e4abc7ae2…

MALICIOUS

PDF

93.5 KB
MD5: 4bb9db4064628f3aad4fc556641df18d SHA-1: 33da9aff11cf79ecd181f2de081824675df33614 SHA-256: cbf1ad8e4abc7ae2e0d698c3862a038022af1a49f8c23c694425a02471385f97
148 Risk Score

Malware Insights

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

The PDF utilizes XFA forms and contains an embedded script payload, as indicated by multiple critical heuristic firings including ClamAV detections. The embedded script is likely responsible for delivering the malicious payload. While the exact nature of the payload is not detailed, the presence of XFA exploitation and embedded scripts points to a common PDF-based attack vector.

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
ad92347c238aa7a2b4d271a626cae2498331afc196a2833fab47f5ed60749ea1		 pdf-embedded-script PDF raw stream script payload at offset 0x246 94992 bytes
Detection
ClamAV: Pdf.Exploit.Agent-36769
Obfuscation or payload: unlikely

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