Malicious PDF — malware analysis report

Static analysis result for SHA-256 dcea56f57be7edf4…

MALICIOUS

PDF

46.5 KB
MD5: 3fb8f52cb914b3401edacd6e1c36fdb6 SHA-1: b91bac21d9c32009becc34185d3fec42ba6b1deb SHA-256: dcea56f57be7edf41388a7c54dc888b9d77285b2d3c9bb6d4827f477a5f4b7b4
156 Risk Score

Malware Insights

MITRE ATT&CK
T1204.002 Malicious File T1553.005 Mark-of-the-Web Bypass

The PDF contains embedded content and a script payload, as indicated by the PDF_EMBEDDED_SCRIPT_PAYLOAD heuristic. ClamAV detection of 'Pdf.Exploit.Agent-36830' on both the main file and an extracted artifact strongly suggests a known exploit. The XFA form and embedded file further support the exploitation vector.

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
fbe7bed4d9c5a43f917d17685910f08b228dac736e4ccef502d0962a23d5de51		 pdf-embedded-file PDF EmbeddedFile object 8 at offset 0xC6 46826 bytes
Detection
ClamAV: Pdf.Exploit.Agent-36830
Obfuscation or payload: unlikely

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