Malicious PDF — malware analysis report

Static analysis result for SHA-256 6064b8b9d2da6dc0…

MALICIOUS

PDF

76.4 KB Created: 2021-04-01 03:23:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 34460f43ebd48b41ab465eaa528baa7b SHA-1: b9c46cc25f719efda873f3460727b16d47bdf6b6 SHA-256: 6064b8b9d2da6dc06675ffead79132744a90e4086b3800311993864e23515ba0
156 Risk Score

Malware Insights

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

This PDF document was flagged by multiple heuristics as malicious, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. The document contains numerous external links, suggesting a link farm or phishing attempt. The primary malicious URL identified is https://mezovuduw.ru/award?keyword=definition+of+artificial+neural+network+pdf, which is likely used to redirect users to further malicious content or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://mezovuduw.ru/award?keyword=definition+of+artificial+neural+network+pdf
    • http://girepodemaz.getenjoyment.net/complex_numbers_for_iit_jee.pdf
    • https://cdn.sqhk.co/dubagojovo/gidrAyR/jijepagoja.pdf
    • https://cdn.sqhk.co/najafizox/ghm1jf1/gedugevif.pdf
    • http://xuxijosut.sportsontheweb.net/satomivemuj.pdf
    • http://pumorux.medianewsonline.com/wisadorebivonewug.pdf
    • https://cdn.sqhk.co/gujowaxexag/hQKmr9C/rainbow_dash_coloring_sheet.pdf
    • http://jisuvakuwiraza.medianewsonline.com/will_fifty_shades_of_grey_be_on_netflix.pdf
    • http://mapugukabazewu.scienceontheweb.net/689061049.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://54d25d35-1219-4e5f-97c3-905e72ea606f.filesusr.com/ugd/6d59ab_c6d3a0b035724d1a9bae6a71860dcdc5.pdf?index=true
    • https://083189c9-8220-4687-a375-57be19a37228.filesusr.com/ugd/909b15_02209e87d7c441809ef4f279622d996e.pdf?index=true
    • https://s3.amazonaws.com/vidadaviwal/the_eraser_thom_yorke.pdf
    • https://f98f40d2-b649-4e6b-99af-b89bbf2331ff.filesusr.com/ugd/724bd4_1235cf0518ab4901a94df1b0a500c0e6.pdf?index=true
    • https://964beff5-d24f-450a-94e2-fa7e9faef44a.filesusr.com/ugd/61158f_8b86b426d8f94aefb8d9248239527a61.pdf?index=true
    • https://s3.amazonaws.com/fejififimaketo/wireless_network_security_key_windows_10.pdf
    • https://s3.amazonaws.com/boxujetanonikuv/maravilloso_desastre_resumen.pdf
    • https://bc3ee532-4344-4262-9f0b-d8353e2229a5.filesusr.com/ugd/6ca3f6_154d28a970e44a108d6ce0f02cfb6117.pdf?index=true
    • https://12f7643e-9106-4823-89c2-0bdaecd1bc22.filesusr.com/ugd/1f6d71_91a30fa0ddbd4457808df219607f4940.pdf?index=true
    • https://s3.amazonaws.com/fadobirak/72481251709.pdf
    • https://s3.amazonaws.com/kujapomib/teaching_transparency_worksheet_cathode_ray_experiments.pdf
    • https://s3.amazonaws.com/jokotaziweluge/77608971513.pdf
    • https://s3.amazonaws.com/zemigiduwagafu/haldi_ceremony_invitation_template.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000edcc.bin
d3443cb372bebe50922e708dcb568d96a2e9f5b4fd9081d42280e519d6832624		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEDCC 5124 bytes
font_01_sfnt_off0000ff69.bin
c70b6aaa62098b1abebe74307661f8609cc27e993375d98ce879907baed833eb		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFF69 10812 bytes

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