Malicious PDF — malware analysis report

Static analysis result for SHA-256 24bf0fa135693f66…

MALICIOUS

PDF

35.9 KB
MD5: cdc27b6544a86671f5b6f86067a0f930 SHA-1: bc91900fb5d05a9dcf84836abadcde13c7332457 SHA-256: 24bf0fa135693f667ec3761e83d5e53e711c1f57545dd62932241a2afcfcd1ae
66 Risk Score

Malware Insights

MITRE ATT&CK
T1204.002 Malicious File T1566.001 Spearphishing Attachment

The PDF file contains embedded objects and an embedded script payload, indicating an attempt to deliver a malicious payload. The ML classifier strongly flagged this PDF as malicious. The presence of multiple embedded files suggests a multi-stage attack or the bundling of various malicious components.

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/1.0/
    • http://www.xfa.org/schema/xfa-template/2.5/
    • http://www.xfa.org/schema/xfa-data/1.0/

Extracted artifacts 6

Files carved from inside the sample during analysis.

FilenameKindSourceSize
embedded_file_obj0008.bin
0a2224c4023b216235b61c3fc4dd17bbfac1ab23a545687f51b97604cf654712		 pdf-embedded-file PDF EmbeddedFile object 8 at offset 0xC6 46 bytes
embedded_file_obj0009.bin
a3f3dc7d30ca280c459d428bf9753b9a12726356566e37450b2694eb40b1d3cf		 pdf-embedded-file PDF EmbeddedFile object 9 at offset 0x138 671 bytes
embedded_file_obj0010.bin
ed507d4dc54965a3e50cdd77624f117004003af3d3aafa80e5149a416bc2a485		 pdf-embedded-file PDF EmbeddedFile object 10 at offset 0x41C 150 bytes
embedded_file_obj0011.bin
919311c4f3a5f8d631c55fffd296ccf550fdb5d7b4350edc85e72b711cfc5686		 pdf-embedded-file PDF EmbeddedFile object 11 at offset 0x4F7 437 bytes
embedded_file_obj0012.bin
072090be5ea6c4a216543a1d4332d27d322264f3038bbd986db2a09048143a1c		 pdf-embedded-file PDF EmbeddedFile object 12 at offset 0x6F1 181 bytes
embedded_file_obj0014.bin
8577829dc3006adcb8d7e63e49da0b504ac582cae34406e9c578741dfda3a913		 pdf-embedded-file PDF EmbeddedFile object 14 at offset 0x7EC 34032 bytes

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