Malicious PDF — malware analysis report

Static analysis result for SHA-256 8a629bb77333f5a7…

MALICIOUS

PDF

42.4 KB
MD5: 0ecae29139537c1f5550ca5ac8edab46 SHA-1: 6e3ab3f5a1e50b66cd8f7aa1bdbe385301db8958 SHA-256: 8a629bb77333f5a7e12792ac60d9da692fd2db79868b33b750ec840f870ba5ca
186 Risk Score

Malware Insights

MITRE ATT&CK
T1204 Malicious File T1204.002 Malicious File: User Execution

The PDF file was flagged by multiple high-confidence heuristics, including ML classification and ClamAV detection, indicating it is malicious. The presence of embedded content and scripts suggests it is designed to exploit vulnerabilities or trick the user into executing a payload. The embedded URLs, while not directly malicious, are part of the XFA form structure.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • ClamAV: Pdf.Exploit.Agent-36830 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Exploit.Agent-36830
  • 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.
  • Embedded file low PDF_EMBEDDED
    PDF embeds a file attachment — could carry an executable or another weaponised document as a nested payload
  • 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_file_obj0008.bin
f3d6bd7b322de2b3a33c5337a20c84792417be609942cc375dc7a4e755ec58c2		 pdf-embedded-file PDF EmbeddedFile object 8 at offset 0xC6 42650 bytes
Detection
ClamAV: Pdf.Exploit.Agent-36830
Obfuscation or payload: unlikely

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