Malicious PDF — malware analysis report

Static analysis result for SHA-256 68858153369a27af…

MALICIOUS

PDF

42.5 KB
MD5: 82ba2b39a9681e31ddd6c438cd563b7c SHA-1: 12fd9827a04f7726978aa5639fb0ede60616557c SHA-256: 68858153369a27aff8112155e48f3e718dfc2ef9b372db9d9248b9db1edd4b0f
176 Risk Score

Malware Insights

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

The PDF sample was flagged by multiple critical heuristics, including ClamAV detection for 'Pdf.Exploit.Agent-36830', indicating a known exploit. The presence of an embedded script payload and XFA form further supports the exploitation of PDF vulnerabilities for client execution. While no specific family was identified, the pattern suggests a downloader or dropper intended for initial compromise.

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
7c9e2134406b2417cc49ef640054fc4f9ae8582707b526865177feaccc051524		 pdf-embedded-file PDF EmbeddedFile object 8 at offset 0xC6 42760 bytes
Detection
ClamAV: Pdf.Exploit.Agent-36830
Obfuscation or payload: unlikely

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