Malicious PDF — malware analysis report

Static analysis result for SHA-256 c01fd25f05053982…

MALICIOUS

PDF

42.5 KB
MD5: 9d43d1bc5e18981a28ce75569d2e72aa SHA-1: 2ae2a1357127404fc4955f62d71387512a1f97b1 SHA-256: c01fd25f05053982331945b54116056edc340552cd43ec3f8d653143d9d65b01
186 Risk Score

Malware Insights

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

The PDF was flagged by multiple heuristics, including ML classification and ClamAV, indicating it contains an exploit. The presence of an embedded script payload and an embedded file further supports this. The ML classifier output of 0.999995 suggests a high likelihood of malicious intent, likely to download and execute a second-stage 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
6db7082f869401c3699766a3d2e5321ffbb75bc0ed87416b35e9cc6334d3b3b7		 pdf-embedded-file PDF EmbeddedFile object 8 at offset 0xC6 42725 bytes
Detection
ClamAV: Pdf.Exploit.Agent-36830
Obfuscation or payload: unlikely

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