Malicious PDF — malware analysis report

Static analysis result for SHA-256 d8445f1cc0b91311…

MALICIOUS

PDF

42.4 KB
MD5: b3be7abdf423a4990ed5f2841a86a653 SHA-1: 94dad2525cc8e623b1ac7e34344f7651fe38f2c5 SHA-256: d8445f1cc0b9131172465728e0e827f06c64e531c8b096decf73b3afaab9ec14
186 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including ML classification and ClamAV, indicating it contains malicious content. An embedded script payload was detected, suggesting the document is designed to exploit a vulnerability and execute a secondary payload. The embedded artifact 'embedded_file_obj0008.bin' is the primary indicator of this malicious activity.

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
52958f551a44f9f8c3983200b11d7224ea2b189722f0019918e419de4e8409d8		 pdf-embedded-file PDF EmbeddedFile object 8 at offset 0xC6 42691 bytes
Detection
ClamAV: Pdf.Exploit.Agent-36830
Obfuscation or payload: unlikely

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