Malicious PDF — malware analysis report

Static analysis result for SHA-256 e5d0c2aa35599ab4…

MALICIOUS

PDF

42.4 KB
MD5: b8cd6712d2dd4bd71f3959f3e6fdb4bb SHA-1: c7dc6c839f44751c629bec92107d706b0b9aa22f SHA-256: e5d0c2aa35599ab44dd26c0f27dfccf5fabb400bd31cb15ad484e513b8efb1e7
186 Risk Score

Malware Insights

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

The PDF document contains embedded scripts and was flagged by multiple heuristics, including ML classifiers and ClamAV, indicating it is a malicious exploit. The embedded script payload is likely responsible for delivering the malicious content. The presence of XFA forms and embedded files further supports its nature as a malicious PDF.

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
4fce1eae850b60ab832d29759ef4eea2219e9d171ded20a1c000b50e4a644bbe		 pdf-embedded-file PDF EmbeddedFile object 8 at offset 0xC6 42690 bytes
Detection
ClamAV: Pdf.Exploit.Agent-36830
Obfuscation or payload: unlikely

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