Malicious PDF — malware analysis report

Static analysis result for SHA-256 fb84b4906171af5b…

MALICIOUS

PDF

42.7 KB
MD5: 27404b4d1a706e80a5bdad763395ff9c SHA-1: f396a5f1c02415c59e643848e8d18aecd8ca790e SHA-256: fb84b4906171af5b8347c8e400f7c83d7d95d2f22a44a29bef40bb613a922e44
188 Risk Score

Malware Insights

MITRE ATT&CK
T1204 Malicious Link T1204.002 Malicious Link: Malicious File

The PDF file contains embedded script content and is flagged by multiple heuristics, including ClamAV detection as 'Pdf.Exploit.Agent-36830'. The ML classifier also strongly indicates maliciousness. The embedded file suggests the PDF is a dropper for a 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 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
92a4dc2e0513203e9a8bd595bc1e4a836936d72952cab32263b0f4d5b858b25a		 pdf-embedded-file PDF EmbeddedFile object 8 at offset 0xC6 43004 bytes
Detection
ClamAV: Pdf.Exploit.Agent-36830
Obfuscation or payload: unlikely

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