Malicious PDF — malware analysis report

Static analysis result for SHA-256 69751b79cc852ba9…

MALICIOUS

PDF

42.5 KB
MD5: 0f7d4a0594ec5d1f34ce7119f12f066b SHA-1: 25b668acae4612153c76c45c1b8c057d55f6b908 SHA-256: 69751b79cc852ba916af5f80d1a58b3b833cb59408ca8baf4864229bdaab23c7
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 classifiers and ClamAV, indicating it contains malicious content. The presence of an embedded script payload and an embedded file suggests the PDF is designed to exploit a vulnerability and execute a secondary payload. The embedded JavaScript, though obfuscated, is likely responsible for initiating the exploit chain.

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
f8d4405c8d77c7850247b19c3e2d4be85b717ba459e5fd698ee8edd7b09199fb		 pdf-embedded-file PDF EmbeddedFile object 8 at offset 0xC6 42767 bytes
Detection
ClamAV: Pdf.Exploit.Agent-36830
Obfuscation or payload: unlikely

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