Malicious PDF — malware analysis report

Static analysis result for SHA-256 fbaf6b4950c70235…

MALICIOUS

PDF

12.0 KB
MD5: b37826d93b75f6b1ea47ff4c5128fbd3 SHA-1: 536c57a6a3568bd80cc68ce92040268ac6ffb57a SHA-256: fbaf6b4950c70235be2d7727ccf764938540676ad69360e42eb5fd9fef490979
66 Risk Score

Malware Insights

MITRE ATT&CK
T1204.002 Malicious File T1566.002 Spearphishing Attachment

The PDF file contains embedded content and an embedded script payload, strongly indicating malicious intent. The ML classifier output of 0.999992 further supports this. While the document body is obfuscated and the specific exploit is not immediately clear, the presence of embedded scripts and files points to a delivery mechanism for a secondary payload. The embedded URLs are not directly actionable for the initial exploit but are part of the document's structure.

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
af5ff386573175ce409ed5c73c111bb2355b315fdbb917aa0312b2d8fb675d07
pdf-embedded-file PDF EmbeddedFile object 8 at offset 0xC6 11611 bytes