Malicious PDF — malware analysis report

Static analysis result for SHA-256 608b806750124044…

MALICIOUS

PDF

42.4 KB
MD5: 5ff2011907d84395236cb895611a78f0 SHA-1: 0c42e9cd8cd98e7bf62c9c5ea0470dafdcbb462a SHA-256: 608b8067501240441fde493031124b2d174de400e45a554ac9843c84a9a8ee63
176 Risk Score

Malware Insights

MITRE ATT&CK
T1203 Exploitation for Client Execution T1059.007 JavaScript

The file is a PDF identified as malicious by ClamAV and an ML classifier, indicating it contains an exploit. Heuristics confirm the presence of an embedded script payload and XFA form, commonly used for PDF exploits. The embedded artifact 'embedded_file_obj0008.bin' likely contains the secondary payload.

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
1b0ac181cb71bedbdb3e37513a2ad26bfa1c102aacb6916e6a5a82be31cabaa7		 pdf-embedded-file PDF EmbeddedFile object 8 at offset 0xC6 42677 bytes
Detection
ClamAV: Pdf.Exploit.Agent-36830
Obfuscation or payload: unlikely

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