Malicious PDF — malware analysis report

Static analysis result for SHA-256 084c06c8d423626d…

MALICIOUS

PDF

42.4 KB
MD5: 83e5728c62f4eba8d7daf8ccd28a39f2 SHA-1: 51860b2d368f555461ae08a5dccb3d99519dfbf0 SHA-256: 084c06c8d423626db1db106a40fb374c168555c62b7ede6054035c57a9f658e1
176 Risk Score

Malware Insights

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

The PDF contains embedded content and a script payload, flagged by multiple heuristics including ClamAV detection as Pdf.Exploit.Agent-36830. The ML classifier also strongly indicates maliciousness. The embedded script likely attempts to exploit a vulnerability to execute a second-stage payload, consistent with a spearphishing attachment attack.

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
742272603513c7ed79d94fb191759b5034926a8a4478f35f9173f4e4c59f9cf3		 pdf-embedded-file PDF EmbeddedFile object 8 at offset 0xC6 42645 bytes
Detection
ClamAV: Pdf.Exploit.Agent-36830
Obfuscation or payload: unlikely

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