Malicious PDF — malware analysis report

Static analysis result for SHA-256 d7e66d4227c46e05…

MALICIOUS

PDF

42.9 KB
MD5: 2da2dedf67b664ee7351001199b7a0d1 SHA-1: 54169f60ed20b841117f2602aa850357640cd043 SHA-256: d7e66d4227c46e05b5f705f3871abf6065b92edaff1a31508700422a43814e2a
186 Risk Score

Malware Insights

MITRE ATT&CK
T1204 Malicious File T1204.002 Malicious File: User Execution: Malicious Attachment T1059 Command and Scripting Interpreter T1059.001 Command and Scripting Interpreter: PowerShell

The PDF file was flagged by multiple heuristics, including ML classification and ClamAV, indicating it contains malicious content. The 'PDF_EMBEDDED_SCRIPT_PAYLOAD' and 'EXTRACTED_FILE_CLAMAV' heuristics suggest that an embedded script or file is responsible for the malicious behavior. The ClamAV detection name 'Pdf.Exploit.Agent-36830' further supports this, pointing to a known exploit targeting PDF documents. The embedded file itself is likely the 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
a99bac23b1e76dc222e39a48fc75f543766ca7014c163ff8f42b9bc78645879a		 pdf-embedded-file PDF EmbeddedFile object 8 at offset 0xC6 43199 bytes
Detection
ClamAV: Pdf.Exploit.Agent-36830
Obfuscation or payload: unlikely

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