Malicious PDF — malware analysis report

Static analysis result for SHA-256 0286021609eedc6d…

MALICIOUS

PDF

42.4 KB
MD5: bc0d419dcced838fed58905f216921d4 SHA-1: e7215aa5e686fb3571fa4f202c70c8902e4cb9d6 SHA-256: 0286021609eedc6d57e62b66ea1abbd025a35bba233d35d8f7ebd47e61eb982d
176 Risk Score

Malware Insights

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

The PDF sample was flagged by multiple heuristics, including ML and ClamAV, indicating it contains malicious content. The presence of embedded scripts and an embedded file suggests the PDF is designed to exploit vulnerabilities and download further malicious content. The embedded script, though partially obfuscated, appears to be JavaScript responsible for fetching and executing a 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
503949147c2a0078460caa532c385436d9144fc18ee07d852f004fa7aedccb7c		 pdf-embedded-file PDF EmbeddedFile object 8 at offset 0xC6 42692 bytes
Detection
ClamAV: Pdf.Exploit.Agent-36830
Obfuscation or payload: unlikely

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