Malicious PDF — malware analysis report

Static analysis result for SHA-256 cbb0719ab5968d51…

MALICIOUS

PDF

591.0 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: 52766318cad5c1d53004fcd5b82e4d47 SHA-1: c0b10f7f562640677e03b13a64790ceefd63e04b SHA-256: cbb0719ab5968d51149d19c05d0f6dcf853fef41b8deba9b2e13d9004b190d60
100 Risk Score

Malware Insights

MITRE ATT&CK
T1204.002 Malicious File T1059.001 PowerShell

The PDF contains embedded files and a remote GoTo action, indicating an attempt to redirect the user or load external content. The ML classifier strongly suggests maliciousness, and the embedded child PDF has suspicious static findings. While no specific script was extracted, the overall structure and heuristics point to a downloader or exploit delivery mechanism.

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
mayall_mars_174.pdf
ed43c241e7af077494cdb32043e510f64927238179c4029ea7c7078f0f0a27df		 pdf-embedded-file PDF EmbeddedFile object 244 at offset 0x1A9E8 262704 bytes
mayall_mars_174_1.pdf
98d82f9acda7180d8a14fc7786ea839b4c634d2c1cd5359ae718c6bb411150fe		 pdf-embedded-file PDF EmbeddedFile object 244 at offset 0x1A9E8 349176 bytes
mayall_mars_174_2.pdf
afa3d2fe9ccce2cb718056efda75cfe5f96c40bc2956220fb66eac189ff0003a		 pdf-embedded-file PDF EmbeddedFile object 244 at offset 0x1A9E8 435698 bytes
stream_019_off0001a01e.bin
567fc34e5ed3e1683d7c1b7a211c2d9c811534fecce57c6e130fa1deaa9e4265		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x1A01E 522267 bytes
objstm_0121_00.bin
7ad66845cee58a11704b1a1038a8bea9b7ddea861882a87bc94f184a950751ec		 pdf-objstm-decoded PDF /ObjStm 121 0 obj (inflated) 1111 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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