Malicious PDF — malware analysis report

Static analysis result for SHA-256 5c5ec5f11d5b91b0…

MALICIOUS

PDF

42.9 KB
MD5: 61c783888653a5ad3888a64f9c700be6 SHA-1: f80b3bc1a08021b0501d970525267d845ed162ff SHA-256: 5c5ec5f11d5b91b0d3774c1594049626736a87f4eda34d34739ff98b08fabb0d
176 Risk Score

Malware Insights

MITRE ATT&CK
T1203 Exploitation for Client Execution

The file is a PDF identified as malicious by ClamAV and an ML classifier, indicating it contains an exploit. The PDF is flagged for embedded scripts and an embedded file, suggesting it's designed to deliver a secondary payload. The embedded artifact's ClamAV detection name further supports its malicious nature.

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 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 script payload in PDF stream low 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 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
1dc013fa8ef5b98e147f840693a5a304896185b07bc67a97f06613d86c82067e		 pdf-embedded-file PDF EmbeddedFile object 8 at offset 0xC6 43195 bytes
Detection
ClamAV: Pdf.Exploit.Agent-36830
Obfuscation or payload: unlikely

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