Malicious PDF — malware analysis report

Static analysis result for SHA-256 ba6b8041efefbd3c…

MALICIOUS

PDF

42.4 KB
MD5: 0b2d8fc652793de27452fcc16dd65029 SHA-1: 58e72befcad1309d3aa20cfe8b1b16d031258bae SHA-256: ba6b8041efefbd3cd6227030558c18e4856150cdb49cb76d8b72a3b8bd7790e2
186 Risk Score

Malware Insights

MITRE ATT&CK
T1204 Malicious File T1204.002 Malicious File: User Execution

The file is a PDF document flagged by multiple high-severity heuristics, including ClamAV detection (Pdf.Exploit.Agent-36830) and an ML classifier indicating maliciousness. It contains an embedded script payload and an embedded file, suggesting it's designed to exploit vulnerabilities and download further malicious content. The specific exploit and payload are not detailed in the provided evidence, but the overall pattern points to a malicious PDF dropper.

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
fff13fd20df309ddde9cf47ab711a7c5ef7570dd01dd441dce3657b2a83259d5		 pdf-embedded-file PDF EmbeddedFile object 8 at offset 0xC6 42669 bytes
Detection
ClamAV: Pdf.Exploit.Agent-36830
Obfuscation or payload: unlikely

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