Malicious PDF — malware analysis report

Static analysis result for SHA-256 6a53db209ed8254e…

MALICIOUS

PDF

100.4 KB
MD5: 33174c84eaffaa530aac797668b4f1b5 SHA-1: 855abda058c42616987f946bf2acebc607f966c9 SHA-256: 6a53db209ed8254edea14067beacc1b8090b9ab81761a5423bbd86fb253d465c
108 Risk Score

Malware Insights

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

The sample is identified as malicious by ClamAV and an ML classifier, with heuristics indicating an embedded script payload within an XFA form. The embedded JavaScript, though obfuscated, appears to be designed to download and execute a secondary payload. The specific exploit used is not fully discernible due to truncation, but it leverages client-side execution within the PDF.

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_00000246.bin
439e9571d394b66c607e508641978b0c76b9ee0173fc4e224d443707795405c9		 pdf-embedded-script PDF raw stream script payload at offset 0x246 102040 bytes

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