Malicious PDF — malware analysis report

Static analysis result for SHA-256 d65dc3626aaf2eca…

MALICIOUS

PDF

553.5 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: e186de5441102f6f56a6c6cae62d13f7 SHA-1: ab8d1fafcc1d2d1a5a950dd329067b310c98729a SHA-256: d65dc3626aaf2ecadc1f7dfed555b1c668d6ab73753e3f3b563e93931ac07668
100 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious File T1059.001 PowerShell

The PDF contains multiple embedded files and a suspicious remote GoTo action, indicating an attempt to deliver malicious content. The ML classifier strongly flagged this PDF as malicious. The presence of embedded PDF files suggests a multi-stage attack, likely aiming to download and execute further payloads.

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
whirlpool_saturn_984.pdf
9756d86ad11b4c4f887114c8ec6fdbba665c42c73c4d9415995cdd27c0eda303		 pdf-embedded-file PDF EmbeddedFile object 244 at offset 0x1A9F7 224315 bytes
whirlpool_saturn_984_1.pdf
61230a6cf10f29a06af2052232322d749e1c3071230164ec6dc9755d99d96cbb		 pdf-embedded-file PDF EmbeddedFile object 244 at offset 0x1A9F7 310827 bytes
whirlpool_saturn_984_2.pdf
bd6fbc6c9b4e385202d3e68adf320dff29c3bddc71e1b58836590c45c80e6252		 pdf-embedded-file PDF EmbeddedFile object 244 at offset 0x1A9F7 397296 bytes
stream_019_off0001a023.bin
697ed540c36ef0ecaaca676e7bebe18a205cb250fd48cc38aebf76f56dce0176		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x1A023 483822 bytes
objstm_0121_00.bin
344b2d9c8a1cc436c55de5296f73726793215414c80d9db6b7d9e35c23088103		 pdf-objstm-decoded PDF /ObjStm 121 0 obj (inflated) 1126 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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