Malicious PDF — malware analysis report

Static analysis result for SHA-256 80c6ae94cb4729bd…

MALICIOUS

PDF

590.7 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: 59259a0c093b36706dfd0ff4bbe44f82 SHA-1: 34dcb64e579265481f7dea64293350ed243a6545 SHA-256: 80c6ae94cb4729bd9a6d3c689f3dee0f017b03b7697f38a3dd0376d9b104b52d
162 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is identified as a malicious PDF dropper by ClamAV and a machine learning classifier. It contains embedded PDF files and suspicious remote GoTo actions, indicating it is designed to deliver further malicious content. The embedded nature and the specific ClamAV detection name suggest a dropper functionality.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8662

Heuristics 5

  • 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.
  • ClamAV: Pdf.Dropper.Agent-7277293-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Dropper.Agent-7277293-0
  • 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
pinwheel_uranus_64.pdf
24b534b7c1136488a363e4ff15bab3d050e6ea35dcb10563fcc01ccd5a96250d		 pdf-embedded-file PDF EmbeddedFile object 244 at offset 0x1A9F1 262465 bytes
pinwheel_uranus_64_1.pdf
67a99c7c123d86dc49c194444cdac185b8cbfd321dc9f3bf54c7d845e5fb7507		 pdf-embedded-file PDF EmbeddedFile object 244 at offset 0x1A9F1 348941 bytes
pinwheel_uranus_64_2.pdf
9d6434e3bbf8c6f9146958f4782e31be12c4fc1f80b2d5fe43ccb32f5163825a		 pdf-embedded-file PDF EmbeddedFile object 244 at offset 0x1A9F1 435466 bytes
stream_019_off0001a021.bin
24fef95b672443ca393fdac56b68460235d132535db2e1c5f237cd2bf583636e		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x1A021 522031 bytes
objstm_0121_00.bin
14ca2a69cf19ef65eef4fd91ddc73785128301117714a108267af04f67ca3a92		 pdf-objstm-decoded PDF /ObjStm 121 0 obj (inflated) 1120 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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