Malicious PDF — malware analysis report

Static analysis result for SHA-256 7ffce4d77c549609…

MALICIOUS

PDF

113.0 KB
MD5: ce78e42213affb2795f49930e645467f SHA-1: 107f88bf36953b94a2e48aed292c7a9e3576fffc SHA-256: 7ffce4d77c549609b09205e9a4f160df32de286b1c125801fd39c02f0c5940a0
108 Risk Score

Malware Insights

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

The PDF file contains embedded JavaScript, indicated by the PDF_EMBEDDED_SCRIPT_PAYLOAD heuristic and the presence of script content within the XFA template. The ML classifier and ClamAV detection strongly suggest malicious intent, likely involving exploitation of a client vulnerability to execute code. The embedded script appears to be obfuscated and attempts to reconstruct a string, but its exact function is unclear due to truncation. The benign URLs present do not detract from the malicious indicators.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • ClamAV: Pdf.Exploit.Agent-6136306-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Exploit.Agent-6136306-0
  • 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_0000025e.bin
981d99babb51b8fdb9dfda0c27bed53c17c16c3ab576676f616885fab48ac632		 pdf-embedded-script PDF raw stream script payload at offset 0x25E 115021 bytes

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