Malicious PDF — malware analysis report

Static analysis result for SHA-256 c774f39023ffc259…

MALICIOUS

PDF

13.4 KB
MD5: 0ccda0d6d273321c5fe892ca620cc32e SHA-1: 25322581a37cd6e5221053b0247bd5229c282796 SHA-256: c774f39023ffc259e895bc6b17aea809bb6090b672f4a29e70d6e99fe7cd17b8
66 Risk Score

Malware Insights

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

The PDF sample was flagged as malicious by an ML classifier with high confidence. It contains an embedded script payload and an embedded file, indicating it is likely designed to exploit a vulnerability and deliver a secondary payload. The specific exploit or payload is not detailed in the provided evidence.

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
08e5d939e766816cd3bbdad0ca457013689bc361b27346cd21c7019278669f74		 pdf-embedded-file PDF EmbeddedFile object 8 at offset 0xC6 13027 bytes

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