Malicious PDF — malware analysis report

Static analysis result for SHA-256 ead230a8deac4da1…

MALICIOUS

PDF

11.9 KB
MD5: cf9c0095b5e95984bbbadfd1a2c90a50 SHA-1: a964ebaf33fba5336ad4bebced71360e213a4df5 SHA-256: ead230a8deac4da1e9a5df366ce4c1284377391833369c56cc180bd88c55558a
126 Risk Score

Malware Insights

MITRE ATT&CK
T1204 Malicious Link T1204.002 Malicious Link: Malicious File T1059 Command and Scripting Interpreter

The sample is a PDF file flagged as malicious by multiple heuristics, including an embedded script payload and a high ML classifier score. The presence of an embedded file object suggests it is designed to deliver a secondary payload. The PDF_XFA heuristic indicates the use of XFA forms, which have been historically exploited.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • ClamAV: Pdf.Exploit.Dropped-78 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Exploit.Dropped-78
  • Embedded script payload in PDF stream medium 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 file low PDF_EMBEDDED
    PDF embeds a file attachment — could carry an executable or another weaponised document as a nested payload
  • XFA form low PDF_XFA
    PDF uses XML Forms Architecture — can contain script logic
  • 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_file_obj0008.bin
2b0964466aef37f7852f8d36ee4b2d93d76f175e5da758e20842761c8275ddd0
pdf-embedded-file PDF EmbeddedFile object 8 at offset 0xC8 11478 bytes