Malicious PDF — malware analysis report

Static analysis result for SHA-256 74c775f4e7fd3b4b…

MALICIOUS

PDF

97.0 KB
MD5: aa62a543e14c90fa347987261e0665a6 SHA-1: a00317c59fcf3b9877d85aadaf9a719585a9e703 SHA-256: 74c775f4e7fd3b4b277aa06521e89f85304d5db76782bc183107a24cfb12f55a
108 Risk Score

Malware Insights

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

The PDF file contains an embedded JavaScript payload within an XFA form, a common technique for exploiting PDF vulnerabilities. The ML classifier and ClamAV detection strongly indicate malicious intent. The embedded script is heavily obfuscated but appears to be designed to download and execute a secondary payload, as suggested by the heuristic firings and the nature of XFA exploits. 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
24ed1646b93cafed96837b35b463c03e4a189afe7417fda196b77b62ebdd18f1		 pdf-embedded-script PDF raw stream script payload at offset 0x26C 98653 bytes

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