Malicious PDF — malware analysis report

Static analysis result for SHA-256 1dd743c781336291…

MALICIOUS

PDF

42.7 KB
MD5: 77f232996a933207167cab4ce8028619 SHA-1: b60d882a5ad1122c7459ec0c8c97c70bae730d8d SHA-256: 1dd743c781336291ac21c437f9c93827896bf3d3ce52d35bafcb27d5fa9a7cc4
156 Risk Score

Malware Insights

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

The critical ClamAV detection 'Pdf.Exploit.Agent-36830' and the 'PDF_EMBEDDED_SCRIPT_PAYLOAD' heuristic indicate this PDF contains an embedded exploit. The embedded file artifact further supports this. The document body contains obfuscated JavaScript-like code, suggesting it's designed to execute malicious actions upon opening. The exact nature of the payload is unclear due to obfuscation, but the exploit is likely intended to download and execute a second-stage 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
9c9d6ddf9c8b77fa11fa4d312c840a6a021b759331eea3000cd67fa7c4fdac31		 pdf-embedded-file PDF EmbeddedFile object 8 at offset 0xC6 43002 bytes
Detection
ClamAV: Pdf.Exploit.Agent-36830
Obfuscation or payload: unlikely

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