Malicious PDF — malware analysis report

Static analysis result for SHA-256 ca4de9d7ae86b955…

MALICIOUS

PDF

28.1 KB
MD5: c5a2b8b934d0379f37e21d47b204ddb2 SHA-1: a337bd6257a458f5ae369c46eb4f76d0b5d33a68 SHA-256: ca4de9d7ae86b955c747422246e2cafe1b5b2cf4d29b45f58d304492b89118ef
86 Risk Score

Malware Insights

MITRE ATT&CK
T1204.002 Malicious File: User Execution: Malicious File T1566.002 Phishing: Spearphishing Attachment

The ML classifier strongly indicates this PDF is malicious. It contains embedded files and scripts, suggesting it's intended to deliver a secondary payload or exploit a vulnerability. The presence of XFA form elements and PRC/3D content are common in malicious PDFs. No specific document body text was available for further analysis of the lure.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • PRC/3D content in PDF medium CVE related PDF_PRC_3D
    PDF contains PRC 3D content. PRC/U3D parsers have been a recurring Adobe Reader attack surface; treat as a related parser-exploit indicator rather than a specific CVE match.
  • 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/xci/1.0/
    • http://www.xfa.org/schema/xfa-template/2.5/

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
embedded_file_obj0002.bin
0a2224c4023b216235b61c3fc4dd17bbfac1ab23a545687f51b97604cf654712		 pdf-embedded-file PDF EmbeddedFile object 2 at offset 0xCA 46 bytes
embedded_file_obj0008.bin
24c130f03a4cf51d470b536e94c1e58af67665739e200e0ce198ad41086243c0		 pdf-embedded-file PDF EmbeddedFile object 8 at offset 0x153 228 bytes
embedded_file_obj0001.bin
6a02b570fd3c806db1e3515d66037a368b9974afbf1636cc806a3e06376a1a0e		 pdf-embedded-file PDF EmbeddedFile object 1 at offset 0x529 26825 bytes

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