Malicious PDF — malware analysis report

Static analysis result for SHA-256 1d8b08295579da63…

MALICIOUS

PDF

13.4 KB
MD5: 23998dc7b5b1d2e6f641c186e0f0cacc SHA-1: 61d03bdb1f9fa4d0a7aea82d7dd6b461a11c193f SHA-256: 1d8b08295579da63e8b2953b785593dde3152e5e7650974b9ad5b20c1c466d25
68 Risk Score

Malware Insights

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

The ML classifier strongly indicates this PDF is malicious. The presence of an embedded script payload and an embedded file suggests it is designed to deliver a secondary payload or exploit a vulnerability. The XFA form structure is also noted, which can sometimes be leveraged for malicious purposes. No specific family could be identified.

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
c45a33a88d5340ec082196411c98c845f075e73d520e70f54452b8b300eb60f8		 pdf-embedded-file PDF EmbeddedFile object 8 at offset 0xC6 12977 bytes

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