Malicious PDF — malware analysis report

Static analysis result for SHA-256 19602c4e7701a63e…

MALICIOUS

PDF

42.5 KB
MD5: a0c59b376c318e48aa2d9f2fb8e60186 SHA-1: 47146861298dd580ac965ee34d331d8fd217bc4e SHA-256: 19602c4e7701a63e386d408cf4c54aa7f7a6b798976a543b7b4c0b8772b86884
176 Risk Score

Malware Insights

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

The PDF was flagged by multiple heuristics, including ML classification and ClamAV, indicating it contains an exploit. The presence of embedded script content and an embedded file suggests the PDF is designed to download and execute a second-stage payload. The specific exploit and payload are not fully discernible from the provided evidence, leading to an unknown family classification.

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
40519f79fa6a83fc36be7b810ff27952acc7af75546a457bc5a07f8c7febfb72		 pdf-embedded-file PDF EmbeddedFile object 8 at offset 0xC6 42781 bytes
Detection
ClamAV: Pdf.Exploit.Agent-36830
Obfuscation or payload: unlikely

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