Malicious PDF — malware analysis report

Static analysis result for SHA-256 5739c45adf9e6e20…

MALICIOUS

PDF

35.7 KB
MD5: b6b48d14ad7365465258b23ecd719427 SHA-1: 517145fa719b5247f350555e5f4b7ce015487f6b SHA-256: 5739c45adf9e6e20ab1db85d39c255e1807134312848a5869396f60cdabba268
66 Risk Score

Malware Insights

MITRE ATT&CK
T1204.002 Malicious File T1566.001 Spearphishing Attachment T1027 Obfuscated Files or Information

The PDF file exhibits multiple indicators of malicious intent, including embedded files and a high-confidence ML classifier score. The presence of embedded script payloads within PDF streams is a common technique for delivering malware. While the document body content is not directly readable, the heuristics strongly suggest the file is a container for malicious content.

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
156e7a95b56135bf28b11051ac835d5d1f0766843ba421b827142efe9ab10df0		 pdf-embedded-file PDF EmbeddedFile object 9 at offset 0x138 672 bytes
embedded_file_obj0010.bin
3af976ba1a58bb39a0f5dea6c817507153caf834526b25374ca737abecdbdb61		 pdf-embedded-file PDF EmbeddedFile object 10 at offset 0x41D 151 bytes
embedded_file_obj0011.bin
919311c4f3a5f8d631c55fffd296ccf550fdb5d7b4350edc85e72b711cfc5686		 pdf-embedded-file PDF EmbeddedFile object 11 at offset 0x4F9 437 bytes
embedded_file_obj0012.bin
072090be5ea6c4a216543a1d4332d27d322264f3038bbd986db2a09048143a1c		 pdf-embedded-file PDF EmbeddedFile object 12 at offset 0x6F3 181 bytes
embedded_file_obj0014.bin
802ad1b7ce8b00c5271aeaf9914c54be2c7ee0e2ee30bcbcaab0c91feb094b5f		 pdf-embedded-file PDF EmbeddedFile object 14 at offset 0x7EE 33847 bytes

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