Malicious PDF — malware analysis report

Static analysis result for SHA-256 1f1fafb440196bf8…

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: 084ff9d0fe70b85052fab1d0866026c7 SHA-1: b0fed9ef6adedbed282a7a280e1f0b3ec82c1275 SHA-256: 1f1fafb440196bf82ed7edecbc2c2d44f53d556aca031536ba91debeb8632e58
160 Risk Score

Malware Insights

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

The file is identified as a malicious PDF by ClamAV and a machine learning classifier. The presence of embedded PDF content and remote GoTo actions suggests an attempt to deliver further malicious content or exploit vulnerabilities. The ClamAV detection name 'Pdf.Dropper.Agent-7237182-0' indicates its function as a dropper.

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-7237182-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Dropper.Agent-7237182-0
  • 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
whirlpool_sun_683.pdf
35e0151bf26b5643ddd664e8dfb9f257537465913315f312e8320b3c461a52ab		 pdf-embedded-file PDF EmbeddedFile object 244 at offset 0x1A9EE 262512 bytes
whirlpool_sun_683_1.pdf
3424ff6520a033b659bf93d7f7fae93660cbc20c07026fd0d19fdc3f6ecf2d6f		 pdf-embedded-file PDF EmbeddedFile object 244 at offset 0x1A9EE 348969 bytes
whirlpool_sun_683_2.pdf
abac4bfd242de85b0a1a46d7365e4a80297f77d5c4941914b1e42bb816c35104		 pdf-embedded-file PDF EmbeddedFile object 244 at offset 0x1A9EE 435491 bytes
stream_019_off0001a020.bin
bb36c4420a86ac73931a6c83f632b678dfac25d3b269b88fc1df4e9be4e906fb		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x1A020 522052 bytes
objstm_0121_00.bin
1b5d2f4c374a92fc5d7c42d5c2ce9a319abeb4df04ffe0858c0afc717e42ad62		 pdf-objstm-decoded PDF /ObjStm 121 0 obj (inflated) 1117 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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