Malicious PDF — malware analysis report

Static analysis result for SHA-256 0d6f9db089f8188d…

MALICIOUS

PDF

46.5 KB
MD5: df42497158b05a6612756cc18d14c29c SHA-1: 1da383bb5a0c0118c53678ca1c9e7b27c149a57f SHA-256: 0d6f9db089f8188d636f3a405dec97263dfe0ad24f793710fc52fe466223af34
176 Risk Score

Malware Insights

MITRE ATT&CK
T1203 Exploitation for Client Execution T1566.001 Spearphishing Attachment

The file is a PDF document flagged by multiple heuristics and a machine learning classifier as malicious, specifically identified as Pdf.Exploit.Agent-36830 by ClamAV. It contains embedded script content and an embedded file, indicating it's designed to exploit vulnerabilities and execute arbitrary code upon opening. The presence of XFA forms and embedded scripts suggests a complex exploit chain.

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 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 script payload in PDF stream low 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 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
062bd6a1e18ac8be4acf98a3c54953e810aef78951724ac73f38bd08d85f9a5a		 pdf-embedded-file PDF EmbeddedFile object 8 at offset 0xC6 46812 bytes
Detection
ClamAV: Pdf.Exploit.Agent-36830
Obfuscation or payload: unlikely

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