Malicious PDF — malware analysis report

Static analysis result for SHA-256 0345016524436c65…

MALICIOUS

PDF

97.0 KB
MD5: 69f6aac63110e8bf6e1adae99f3bc61d SHA-1: 394a7c2e75af6e5b9f20a65fc0e4118e2281c5a4 SHA-256: 0345016524436c65398894a205ef206920e8f7db020469536f5ddaec6d4cabd1
108 Risk Score

Malware Insights

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

The file is a PDF with an embedded XFA form and JavaScript payload, flagged by multiple heuristics and ClamAV as malicious. The embedded script is heavily obfuscated but appears to be designed to download and execute a second-stage payload. 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_0000026c.bin
87e8070c448c86f330fbf90253b8498cd31c5241de5a6d129e135791ba8c0689		 pdf-embedded-script PDF raw stream script payload at offset 0x26C 98653 bytes

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