Malicious PDF — malware analysis report

Static analysis result for SHA-256 66ef959b322835af…

MALICIOUS

PDF

97.0 KB
MD5: 70f6468d1075f104557b0a0c00040a0e SHA-1: 537af46912dbf2be2c3dcca5d7b23a621977fbb6 SHA-256: 66ef959b322835af9a0ec1e339369aee9be873116bd2f706132c680ee21ebbc0
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 within an XFA form, a known vector for exploitation. The embedded script is heavily obfuscated but appears to be designed to download and execute a secondary payload. ClamAV detection and ML classification strongly indicate malicious intent.

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_0000026a.bin
07a283985751e28e8b07666adbf29eead46596fd8ceb7651f050e8ef548e084b		 pdf-embedded-script PDF raw stream script payload at offset 0x26A 98653 bytes

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