Malicious PDF — malware analysis report

Static analysis result for SHA-256 70d9c4d504fa9618…

MALICIOUS

PDF

52.4 KB
MD5: 9517057e9788dbcf957c66af4a333f7d SHA-1: c48b501132de15c0991f5485118591f79ab72b7c SHA-256: 70d9c4d504fa96180f1102e80ce5bbc77e5fff7983c9ea8af86a0aeaec19ebec
108 Risk Score

Malware Insights

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

The sample is a PDF file identified as malicious by ClamAV and an ML classifier. It contains an embedded JavaScript payload within an XFA form, indicating an attempt to exploit a PDF vulnerability. The script is heavily obfuscated but appears to be designed to download and execute a second-stage payload, a common technique for malware delivery. The benign URLs present are likely decoys or standard XFA schema references.

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_00000240.bin
31b304bc347333d41f8c7b34d303663aac9640ca65b9e68cf78a7b3fedc26855		 pdf-embedded-script PDF raw stream script payload at offset 0x240 52928 bytes

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