Malicious PDF — malware analysis report

Static analysis result for SHA-256 e6a6db708631fabd…

MALICIOUS

PDF

13.4 KB
MD5: 245334478746b9acd17b0abf93d01212 SHA-1: fff69d0ef2b86fb3b351f9e41633e3078692ef14 SHA-256: e6a6db708631fabd13a066f3c5964b2921ff56cc6e3e5bb92548577bdedbf33b
68 Risk Score

Malware Insights

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

The PDF sample was flagged by an ML classifier with high confidence as malicious. Heuristics indicate the presence of an embedded script payload and an embedded file, suggesting it's designed to exploit a PDF vulnerability. The embedded file is the primary indicator of a potential second-stage payload.

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
2aa1a4b68f186f1d7bc67963bc1319412eb2d31711fedea966b2c0590cc8fca3		 pdf-embedded-file PDF EmbeddedFile object 8 at offset 0xD1 12966 bytes

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