Malicious PDF — malware analysis report

Static analysis result for SHA-256 c75d9d1c5c2a4aa2…

MALICIOUS

PDF

42.4 KB
MD5: 026b3dfb7161ad88b13885bd7d934f8f SHA-1: d6bfac5c26eb7af0a69df57df2c9c983362deb0d SHA-256: c75d9d1c5c2a4aa2d7b43b2ce15bb22fe6c94b8f0c894f64338b04144ebbe238
186 Risk Score

Malware Insights

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

The file is identified as malicious by multiple high-confidence heuristics, including ML classification and ClamAV detection (Pdf.Exploit.Agent-36830). The presence of an embedded script payload and an embedded file strongly suggests that this PDF is designed to exploit a vulnerability and download or execute a secondary malicious payload. The specific exploit targeted is not detailed in the provided evidence, but the overall pattern is consistent with 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
7065e429e7a926f83bf847f6e22f36876087d2150bc9cb4ba01ae95fcbefaa3a		 pdf-embedded-file PDF EmbeddedFile object 8 at offset 0xC6 42710 bytes
Detection
ClamAV: Pdf.Exploit.Agent-36830
Obfuscation or payload: unlikely

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