Malicious PDF — malware analysis report

Static analysis result for SHA-256 dcc0ac9ad6a5ab48…

MALICIOUS

PDF

591.5 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: d12a00974a370b276005cfdefa7acadb SHA-1: c2430541a3f208210c203f318919f49461e463cb SHA-256: dcc0ac9ad6a5ab48a4021e2ed28b56703b2eb49e8d83f039de915ca13b9150a5
160 Risk Score

Malware Insights

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

The PDF exhibits critical heuristic firings indicating embedded suspicious content and remote actions, strongly suggesting it's a dropper. The ML classifier also flagged it with high confidence. ClamAV detection as 'Pdf.Dropper.Agent-7312768-0' further supports its malicious nature. While no specific script was extracted, the embedded nature and dropper classification point to an attack pattern focused on delivering further malicious content.

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-7312768-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Dropper.Agent-7312768-0
  • 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
cosmos_jupiter_501.pdf
87fc84347410d6058b432f208a7a42bd8f07b47c10792138b523fd62b5832997		 pdf-embedded-file PDF EmbeddedFile object 244 at offset 0x1A9F1 263318 bytes
cosmos_jupiter_501_1.pdf
974ce9c2b9ee522cae731f29d48b300c3221c0312777f8ef645a240fdb6ce5ef		 pdf-embedded-file PDF EmbeddedFile object 244 at offset 0x1A9F1 349793 bytes
cosmos_jupiter_501_2.pdf
433ee8ef3cd3a0625b00ca95ec369902597ee56867941db4587c9db65511c576		 pdf-embedded-file PDF EmbeddedFile object 244 at offset 0x1A9F1 436311 bytes
stream_019_off0001a021.bin
ae178ae9285928d7fd135c929df7f6bd97bae59f63a4797b3d7354f730cb4212		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x1A021 522878 bytes
objstm_0121_00.bin
03dfe03870026fa2b70217d4b4f054e6071b8a4a1a40225d5dc0279e6de60bb4		 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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