Malicious PDF — malware analysis report

Static analysis result for SHA-256 e6a5ff1a8b8a8dcb…

MALICIOUS

PDF

42.5 KB
MD5: 366b3b6f6db169604950c8b8a741236d SHA-1: c69c8707d1684d185a46be7ad82367a2541ee2ef SHA-256: e6a5ff1a8b8a8dcbe7b953123274ca83e6f0a2a556f3db84973c455a4b70e9eb
186 Risk Score

Malware Insights

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

The PDF file was flagged by multiple high-severity heuristics, including ML classification and ClamAV detection, indicating it is malicious. The presence of an embedded script payload and an embedded file suggests the PDF is designed to exploit vulnerabilities and deliver a secondary malicious artifact. The ML classifier's output of 0.999995 strongly supports the malicious verdict.

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
a142d34526e0335f61660b72b16f8da31502051a7772505d5f056c64d7c7b818		 pdf-embedded-file PDF EmbeddedFile object 8 at offset 0xC6 42771 bytes
Detection
ClamAV: Pdf.Exploit.Agent-36830
Obfuscation or payload: unlikely

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