Malicious PDF — malware analysis report

Static analysis result for SHA-256 19356f329a97c167…

MALICIOUS

PDF

111.2 KB
MD5: 20ea7b00e9c0991df5b5387b8be27311 SHA-1: 83362db16724b400b7814ac0fb379b954af702a9 SHA-256: 19356f329a97c167b104d5ec62ea51e15639fe376f54a6b9e16b522afd75d757
108 Risk Score

Malware Insights

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

The PDF file contains XFA (XML Forms Architecture) elements and an embedded JavaScript payload. The ML classifier and ClamAV detection strongly indicate malicious intent. The embedded script, although obfuscated, likely attempts to download and execute a secondary payload, a common technique for initial access via spearphishing attachments.

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
9bff2c94afa3749a7d0bd8bb08399d76c3fd2c1eac573c3a50f7249b28e8c69f
pdf-embedded-script PDF raw stream script payload at offset 0x26A 113193 bytes