Malicious PDF — malware analysis report

Static analysis result for SHA-256 8774bf1d6c3b9d8a…

MALICIOUS

PDF

93.6 KB
MD5: 8c19d918104a1a38db2f058a9bd6d9c4 SHA-1: c329617b2ec2de2747e5f6689e9bfb2424e5ed79 SHA-256: 8774bf1d6c3b9d8a75dcec7cd7d154d37a51e1b5b493d1664593578c8daf3aa6
148 Risk Score

Malware Insights

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

The PDF file contains an XFA form and an embedded script payload, triggering critical ClamAV detections for Pdf.Exploit.Agent-6136306-0 and Pdf.Exploit.Agent-36769. The embedded script is likely responsible for delivering the malicious payload, although its specific actions are not detailed in the provided evidence. The presence of XFA and embedded scripts in a PDF strongly suggests an exploit attempt.

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
8f0bff7bf6759f9cd87e235dfbb98d3334cc1c4d1421f0e8e8fb64373f9576bf		 pdf-embedded-script PDF raw stream script payload at offset 0x246 95096 bytes
Detection
ClamAV: Pdf.Exploit.Agent-36769
Obfuscation or payload: unlikely

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