Malicious PDF — malware analysis report

Static analysis result for SHA-256 7186ce73fb274f0a…

MALICIOUS

PDF

42.4 KB
MD5: df724be2034d27a0abe1c0f38699e035 SHA-1: 1a650058d6b04f16a25c1e8bbd7f35acbcbb52b0 SHA-256: 7186ce73fb274f0a883e29efb8ad4a177c9ea81cb5485d5273f3b7b9536b038f
176 Risk Score

Malware Insights

MITRE ATT&CK
T1203 Exploitation for Client Execution

The sample is a PDF file flagged by multiple heuristics and ClamAV as malicious, specifically indicating an exploit. The ML classifier also strongly suggests maliciousness. The PDF contains embedded script content and an embedded file, which are common techniques for delivering exploits. No specific family could be identified.

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
9ca5f03301039f0cf5b8d94bdfd24d44487242da9603e0be0158077cfc674d84		 pdf-embedded-file PDF EmbeddedFile object 8 at offset 0xC6 42698 bytes
Detection
ClamAV: Pdf.Exploit.Agent-36830
Obfuscation or payload: unlikely

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