Malicious PDF — malware analysis report

Static analysis result for SHA-256 6c56b7101067d949…

MALICIOUS

PDF

553.2 KB Created: 2010-03-31 12:55:11 -04:00 Authoring application: Adobe InDesign CS4 (6.0.4) (via Adobe PDF Library 9.0)
MD5: b3098367ed6423745234b6f550eb23c3 SHA-1: 14db762eda92051bc679c4df10c1478b95ebf61e SHA-256: 6c56b7101067d94928a9e8cb6b8f143c3be533cf08c68268083a5e6e84768ead
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains multiple embedded PDF files and a remote GoTo action, indicating a likely attempt to chain exploits or deliver additional malicious content. The ML classifier also flagged this PDF as malicious with a high score. While no specific script was directly extracted and analyzed, the presence of embedded files and remote actions strongly suggests a multi-stage attack, potentially initiated via spearphishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8662

Heuristics 4

  • Embedded PDF child has suspicious static findings critical PDF_EMBEDDED_CHILD_STATIC_TRIAGE
    PDF contains an embedded PDF stream whose extracted child matches suspicious or malicious PDF heuristics. Wrapper PDFs are commonly used to hide the actual exploit or lure payload from scanners that do not recursively inspect attachments.
  • Embedded file low PDF_EMBEDDED
    PDF embeds a file attachment — could carry an executable or another weaponised document as a nested payload
  • Remote GoTo action info PDF_GOTO_REMOTE
    PDF has GoToR/GoToE actions that reference sibling document files — typical of multi-part document bundles
  • 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://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/g/img/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/sType/ResourceEvent#
    • http://ns.adobe.com/xap/1.0/sType/ResourceRef#
    • http://ns.adobe.com/xap/1.0/sType/ManifestItem#
    • http://ns.adobe.com/xmp/InDesign/private
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/t/pg/
    • http://ns.adobe.com/xap/1.0/sType/Dimensions#
    • http://ns.adobe.com/xap/1.0/g/

Extracted artifacts 9

Files carved from inside the sample during analysis.

FilenameKindSourceSize
tadpole_venus_566.pdf
763104e3bb30dc785b7865b2f29c6fe254aebf16ce14e98e8b14789da474407c		 pdf-embedded-file PDF EmbeddedFile object 244 at offset 0x1A9EE 224079 bytes
tadpole_venus_566_1.pdf
ae4ce337bd6037845aea938853e0f64fbb7aaec02af3818a902cabfa18f62d71		 pdf-embedded-file PDF EmbeddedFile object 244 at offset 0x1A9EE 310588 bytes
tadpole_venus_566_2.pdf
7e28d975dae31358ce21b569b30e16e92af18ee4167df81901c7c89fdbed7224		 pdf-embedded-file PDF EmbeddedFile object 244 at offset 0x1A9EE 397036 bytes
stream_019_off0001a020.bin
3bc41025434dfae07c873d7d0b1d7944e532268ace3b7bb5752c52af12d4fd6d		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x1A020 483566 bytes
objstm_0121_00.bin
881cc1e44a5a98ff76ea51011b4d4c301a3d286bcd597138ebd8972e1c4ff146		 pdf-objstm-decoded PDF /ObjStm 121 0 obj (inflated) 1117 bytes
font_00_cff_off0000b46d.bin
38d7d0627d6ef08fdb595be75f8f12752f3381fa7a1441ca8f76a5e76dc6e7b9		 pdf-font-stream PDF embedded font (cff) at offset 0xB46D 609 bytes
font_01_cff_off0000ba3f.bin
5f3f348279f5218a0f3607c4a8e7c1b2190742072e04b58112191aa6b4235f52		 pdf-font-stream PDF embedded font (cff) at offset 0xBA3F 886 bytes
font_02_cff_off0000c1e7.bin
7e5cb310f6cb7822b8a316192e8347738bb3f1d76fe954bdbf17623d2e87f2fb		 pdf-font-stream PDF embedded font (cff) at offset 0xC1E7 3808 bytes
font_03_cff_off0000d457.bin
99bc093cddfa13f76f619bedeaf723ce24882a341f9686e35da3cad8dbab0a72		 pdf-font-stream PDF embedded font (cff) at offset 0xD457 3669 bytes

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