Malicious PDF — malware analysis report

Static analysis result for SHA-256 74da40acd69a83e3…

MALICIOUS

PDF

42.8 KB
MD5: ca4686450f395f120b7b6be6e2bc660a SHA-1: 71d6fec94a99f0dc10471f3d89a9191f9e5c3520 SHA-256: 74da40acd69a83e3bde30a3e6891363b68e6731eab5d968ba8c70e010c86d743
176 Risk Score

Malware Insights

MITRE ATT&CK
T1203 Exploitation for Client Execution T1059.007 JavaScript

The PDF document contains embedded JavaScript, indicated by the PDF_EMBEDDED_SCRIPT_PAYLOAD heuristic and the ML_NYX_PDF_MALICIOUS classification. ClamAV detection (Pdf.Exploit.Agent-36830) confirms the malicious nature, likely exploiting a client execution vulnerability. The embedded script is responsible for executing the malicious payload.

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 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 script payload in PDF stream low 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 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
16f1c92f27c01e0ea57d4dedb8a79a2a1a4826e22a49d3c7eb33167d7453ec6e		 pdf-embedded-file PDF EmbeddedFile object 8 at offset 0xC6 43124 bytes
Detection
ClamAV: Pdf.Exploit.Agent-36830
Obfuscation or payload: unlikely

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