Malicious PDF — malware analysis report

Static analysis result for SHA-256 4b33597b40ad5f4d…

MALICIOUS

PDF

42.0 KB
MD5: 8c780fd2a6a9f5439d30be5e21492bc1 SHA-1: 342193e78e1fe5119abfb464a83403a6afe9ec49 SHA-256: 4b33597b40ad5f4d9d0c46e2f7da4ec19475f6e2bb5ff70d6a4d67f8b04d0a23
156 Risk Score

Malware Insights

MITRE ATT&CK
T1204.002 Malicious File T1566.002 Spearphishing Attachment

The PDF file was detected by ClamAV as Pdf.Exploit.Agent-36830, indicating it contains a known exploit. Heuristics confirm the presence of an embedded script payload and an embedded file, which are common delivery mechanisms for malicious content. The embedded content is likely responsible for the exploit execution.

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
05dd24f1a586dc40ad90b585089557fbfd592fb37e440aa0ad4c93bf19bf5442		 pdf-embedded-file PDF EmbeddedFile object 8 at offset 0xC6 42301 bytes
Detection
ClamAV: Pdf.Exploit.Agent-36830
Obfuscation or payload: unlikely

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