Malicious PDF — malware analysis report

Static analysis result for SHA-256 c9f94da948d8eaa4…

MALICIOUS

PDF

13.4 KB
MD5: c69ffbe1e6ac6dbe1030b888ac86d9d8 SHA-1: 73b45e011efd961d474d0f5e299658fb2f950ad8 SHA-256: c9f94da948d8eaa4f9e6674d2776742cd11bb45123083905176e85330a97529a
66 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. The presence of an embedded script payload and an embedded file suggests it is intended to deliver a secondary exploit or malware. The XFA form and embedded file heuristics further support its malicious nature, likely as a delivery mechanism for further compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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
93565439ef321e3cb26ce43b8565004f309903cd27ba5e297694c0be8d992e8f		 pdf-embedded-file PDF EmbeddedFile object 8 at offset 0xC6 13018 bytes

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