Malicious PDF — malware analysis report

Static analysis result for SHA-256 bee9be4a3b7875bc…

MALICIOUS

PDF

13.0 KB
MD5: f481e5e8aff2bbb012b7f173ea13c436 SHA-1: 07afd0e2c144c5e76b352b4d622135cf48cc25b0 SHA-256: bee9be4a3b7875bc2ed17459ead73d4915b44668fc12f9bb7ad60f3bb82358e1
66 Risk Score

Malware Insights

MITRE ATT&CK
T1204 Malicious File T1204.002 Malicious File: User Execution: Malicious Attachment T1059 Command and Scripting Interpreter

The ML classifier strongly indicates maliciousness, supported by heuristics for embedded script payloads and embedded files within the PDF. The presence of an embedded file object, 'embedded_file_obj0008.bin', suggests the document is designed to deliver a secondary payload. The document body contains obfuscated JavaScript, likely intended to download and execute this payload, although the exact script functionality is difficult to ascertain due to obfuscation.

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/xci/
    • 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
49133d2f0fe7011c230e41f875d8404b98e62123b800806f31cae86cf18b5472		 pdf-embedded-file PDF EmbeddedFile object 8 at offset 0xD5 12586 bytes

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