Malicious PDF — malware analysis report

Static analysis result for SHA-256 bd9e640e3d20b679…

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: 6b9ba5b6f6484e2934df45d358c8aaec SHA-1: cc23c2262a0363b8f6c8e2552287c34042920b61 SHA-256: bd9e640e3d20b679a5728378882213b75729e57a52bb290a97b4db215c29c979
160 Risk Score

Malware Insights

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

The file is identified as malicious by ClamAV and an ML classifier, with critical heuristics indicating embedded PDF files and remote GoTo actions. The presence of embedded PDFs suggests a dropper functionality, likely intended to deliver a secondary payload. The specific ClamAV detection name 'Pdf.Dropper.Agent-7217234-0' is the primary IOC.

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-7217234-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Dropper.Agent-7217234-0
  • 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 8

Files carved from inside the sample during analysis.

FilenameKindSourceSize
sunflower_mercury_583.pdf
c4f0aa3dd2a3e48187c2778cfa8f5709d5cc715bd2a5f739eb9323099bc6fd41		 pdf-embedded-file PDF EmbeddedFile object 244 at offset 0x1A9FA 262436 bytes
sunflower_mercury_583_1.pdf
b7d48880777f4022a4dfa3d3e7d694a735a7989b901e68a5c1bea3e86673adae		 pdf-embedded-file PDF EmbeddedFile object 244 at offset 0x1A9FA 348917 bytes
sunflower_mercury_583_2.pdf
aa6e3991545ae28972eba34ee77504e4defb40a960a5dce43dbba85f11be5985		 pdf-embedded-file PDF EmbeddedFile object 244 at offset 0x1A9FA 435451 bytes
objstm_0121_00.bin
f8a814399c6b872ed60fc682df3204c7901b5925e804806b1de32d825ee776d6		 pdf-objstm-decoded PDF /ObjStm 121 0 obj (inflated) 1129 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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