Malicious PDF — malware analysis report

Static analysis result for SHA-256 c6774ee8eb16a784…

MALICIOUS

PDF

46.4 KB
MD5: ab0badfdcd749ad27d0f98dbe7a7f02d SHA-1: 1a72c5765bd2f7df3c124accc0ba3703551b8ac1 SHA-256: c6774ee8eb16a784e03055319decf7398df655fee76c6a2ad5becfc6461dbef8
186 Risk Score

Malware Insights

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

The PDF was flagged by multiple high-confidence heuristics, including ML classification and ClamAV detection, indicating it contains malicious content. The 'PDF_EMBEDDED_SCRIPT_PAYLOAD' and 'EXTRACTED_FILE_CLAMAV' firings suggest the PDF contains and executes embedded malicious code, likely delivered via the embedded file artifact. The document body content is highly obfuscated and appears to be part of the exploit mechanism rather than user-facing text.

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
782e92a264b315007faa5cbf814636a2226705c00ba8f257d30ed149bd62f150		 pdf-embedded-file PDF EmbeddedFile object 8 at offset 0xC6 46739 bytes
Detection
ClamAV: Pdf.Exploit.Agent-36830
Obfuscation or payload: unlikely

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