Malicious PDF — malware analysis report

Static analysis result for SHA-256 776d992dc1747f67…

MALICIOUS

PDF

79.1 KB
MD5: 5539fee6eaae51aa4f4912fd3dcfb9b6 SHA-1: d966524f331260aaf17e76b3b90c0b91cebb5c6d SHA-256: 776d992dc1747f675539109498765472bb2941f44d2349b0e1660b02ddc3fe61
168 Risk Score

Malware Insights

MITRE ATT&CK
T1059.007 JavaScript T1203 Exploitation for Client Execution T1566.001 Spearphishing Attachment

The PDF utilizes XFA (XML Forms Architecture) and contains an embedded JavaScript payload. Heuristics indicate this script is designed to execute, and ClamAV detections suggest it's an exploit agent. The script's obfuscated nature and truncated content prevent a definitive analysis of its exact actions, but it is highly probable that it attempts to download and execute a secondary payload. The benign URLs present are part of the XFA schema and do not indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • ClamAV: Pdf.Exploit.Agent-6136306-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Exploit.Agent-6136306-0
  • 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.
  • 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_pdf_script_0000023c.bin
84c23a276a61f1e38f60d6fe29d0037bb629e4689921d554971443c30e7194c7		 pdf-embedded-script PDF raw stream script payload at offset 0x23C 80285 bytes
Detection
ClamAV: Js.Exploit.HTML-29
Obfuscation or payload: unlikely

Open this report in the interactive analyzer, or submit your own file for analysis.