Malicious PDF — malware analysis report

Static analysis result for SHA-256 f93048a1563e1d07…

MALICIOUS

PDF

100.4 KB
MD5: f957d964cfd2ce4ee20894e9c254b545 SHA-1: 8136adea4abaff401840d36efdfce9614b0549d0 SHA-256: f93048a1563e1d079085f664b47500c83d7286db15f8495ed904fe1f0f945d47
178 Risk Score

Malware Insights

MITRE ATT&CK
T1204 Malicious File T1204.002 Malicious File: Malicious PDF

The PDF file contains an embedded script payload within an XFA form, as indicated by multiple high-severity heuristics and ClamAV detections. The ML classifier also strongly flagged this PDF as malicious. The embedded script is likely responsible for delivering a secondary exploit or payload, though its exact function is not fully discernible from the provided evidence. The primary IOCs are the ClamAV detection names.

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
1d5479741526cb4f54886bc4e18e2d592f1805b41b05202511a467d5532f7bce		 pdf-embedded-script PDF raw stream script payload at offset 0x246 102042 bytes
Detection
ClamAV: Pdf.Exploit.Agent-36769
Obfuscation or payload: unlikely

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