Malicious PDF — malware analysis report

Static analysis result for SHA-256 8f1d784d651b26c0…

MALICIOUS

PDF

42.5 KB
MD5: 40ac01a880fff8a57128aab5054fa276 SHA-1: df809c973c757819854a73ae592782d04239c9e6 SHA-256: 8f1d784d651b26c06f548fc81b51529648398470240ba2bd0c78bc9d2d5a9a4b
156 Risk Score

Malware Insights

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

The critical ClamAV heuristic firings indicate this PDF file is malicious and contains an embedded script payload. The embedded file artifact further supports the delivery of a secondary malicious component. The file is likely designed to exploit a PDF vulnerability to execute this payload.

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
3b1b41e545483682e5e98a5cf2be21322bb5f6dd256446b7e6ce83c07b02ddd8		 pdf-embedded-file PDF EmbeddedFile object 8 at offset 0xC6 42778 bytes
Detection
ClamAV: Pdf.Exploit.Agent-36830
Obfuscation or payload: unlikely

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