Malicious PDF — malware analysis report

Static analysis result for SHA-256 d5a83576c0e4d89b…

MALICIOUS

PDF

13.3 KB
MD5: 32b54572e448da6a2c724b766fe548a3 SHA-1: a9b5352d72ee53d82fc61a010c348c7da188337e SHA-256: d5a83576c0e4d89b0cf7d7b5df3f9bbf41f7fc83ae848c7a44557e6281edeb6f
66 Risk Score

Malware Insights

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

The sample is a PDF file flagged by a machine learning classifier as malicious. 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
4c281e5c37662e775ab180c9cc78c6b6a082a35bcc72c536cfdae8f7ad475922		 pdf-embedded-file PDF EmbeddedFile object 8 at offset 0xC6 12882 bytes

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