Malicious PDF — malware analysis report

Static analysis result for SHA-256 b0c91d9624a711b2…

MALICIOUS

PDF

134.9 KB Created: 2021-03-18 07:50:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 08b9b4cbc5163abd8b269920bed32a48 SHA-1: 7493148e3df1e50e473387597406ef528ad12311 SHA-256: b0c91d9624a711b2875d2164a18cf5ea996c36acf5a655aa4545b35053f8ac58
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file was flagged as malicious by a ClamAV detection (Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0) and an ML classifier. It contains an embedded external URI pointing to 'https://kuzutuzo.ru/wix?keyword=2001+camry+manual', which is likely the primary malicious component. No scripts were extracted, but the presence of an external URI in a malicious PDF strongly suggests a phishing or malware delivery attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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 https://kuzutuzo.ru/wix?keyword=2001+camry+manual
    • https://static.s123-cdn-static.com/uploads/4368489/normal_5fef89c5b1058.pdf
    • https://cdn-cms.f-static.net/uploads/4475727/normal_6041d2b6cf2a7.pdf
    • https://static.s123-cdn-static.com/uploads/4370309/normal_5ffda0f497d71.pdf
    • https://static.s123-cdn-static.com/uploads/4416504/normal_5feb0dbd0f653.pdf
    • https://static.s123-cdn-static.com/uploads/4494451/normal_5fe293a107129.pdf
    • http://lakuvekavepoka.iblogger.org/najajifaxisiraxuwowa.pdf
    • http://dazefoxezizu.iblogger.org/36056677805.pdf
    • https://cdn-cms.f-static.net/uploads/4417226/normal_5fdaa8d7a7251.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/60454bfb-5320-4f2b-b37c-b38d06857dcd/vajobodebu.pdf
    • https://uploads.strikinglycdn.com/files/ca9b3567-847d-4dbd-ac1d-a90e2e486e0b/bollinger_on_bollinger_bands_book.pdf
    • https://uploads.strikinglycdn.com/files/60b4a8c9-2e2d-4ac0-a536-7a02d379f8f1/88618141805.pdf
    • https://uploads.strikinglycdn.com/files/95b90cf2-fe8e-46c7-9fc4-f3329914b8f0/britax_frontier_clicktight_installation.pdf
    • https://uploads.strikinglycdn.com/files/6652a578-3d57-4564-a8c2-b5373710d5a1/36110551681.pdf
    • https://uploads.strikinglycdn.com/files/ec2521d6-cd55-40b5-9403-64587fe1f45c/buwasizudigoguderavenufuv.pdf
    • http://gekazez.epizy.com/best_2019_movies_sites.pdf
    • https://uploads.strikinglycdn.com/files/2d2a51d3-6ce6-46cc-b9ac-ce08d2357c78/what_is_cognitive_development_in_babies.pdf
    • https://uploads.strikinglycdn.com/files/f093e2a8-ef9b-4b74-bd82-f14f7ea0028b/58131178812.pdf
    • https://uploads.strikinglycdn.com/files/d04e3c24-5948-44eb-95e8-f4c361702bd6/nuputuzimade.pdf
    • https://uploads.strikinglycdn.com/files/138b8741-7c00-4469-80f5-1b1b4c120e97/polder_kitchen_scale_user_manual.pdf
    • https://uploads.strikinglycdn.com/files/776f8b28-fa06-4369-b8ad-b2e0bed5d9d7/sevumep.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001c188.bin
607220e54df98de02d7af66c24aeaac06acd915dcae14e6f2cf930120b022ae3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1C188 5100 bytes
font_01_sfnt_off0001d2d1.bin
9850207f22afb8a35ce65947261f3d3480841127e06aa15a49ac0ae419fba666		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1D2D1 11080 bytes
font_02_sfnt_off0001f8c6.bin
e9f71365a2a9ea4b152c2f6701d7ccf33f67bf216d443f7f7b47b7c3311bc682		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1F8C6 16112 bytes

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