Malicious PDF — malware analysis report

Static analysis result for SHA-256 8766e95c795a6d8d…

MALICIOUS

PDF

79.3 KB
MD5: 5adfef4e2f897ce714a685bc53544ee3 SHA-1: b0ced65d1b25d69f6a8e806fc683a057cb751a09 SHA-256: 8766e95c795a6d8d5b74e071d9c5f8fc72c16041029feba9da024875efff10ae
148 Risk Score

Malware Insights

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

The PDF file utilizes XFA forms, a known vector for exploitation. ClamAV detections indicate the presence of a malicious exploit agent. An embedded script payload was also identified, likely responsible for executing the malicious activity. The exact nature of the script's payload is unclear due to its embedded nature, but it is highly probable that it downloads and executes a second-stage payload.

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_0000023e.bin
1242973985d8865a48cc2cfd7f9d914ce47c49db8c33c83e815777e6aa8227a0		 pdf-embedded-script PDF raw stream script payload at offset 0x23E 80469 bytes
Detection
ClamAV: Pdf.Exploit.Agent-36769
Obfuscation or payload: unlikely

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