Malicious PDF — malware analysis report

Static analysis result for SHA-256 88e98a4251da1945…

MALICIOUS

PDF

97.3 KB
MD5: 68b57e7e89060290fb105777a2da6901 SHA-1: 0c06b6fe674123982fc24ebbb58e1a79f714cfbd SHA-256: 88e98a4251da1945493bf39e0ddaaab0eb994239a7ac302d18487a0881811719
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 JavaScript 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
f372d657c8c8bf7323c85e82bc560be1af9845d4503bf02ed6e1f82387b23c9f		 pdf-embedded-script PDF raw stream script payload at offset 0x26C 98867 bytes

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