Malicious PDF — malware analysis report

Static analysis result for SHA-256 66889d3f837ea318…

MALICIOUS

PDF

76.6 KB Created: 2021-03-20 16:11:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: 67fd1b9995dc6d38693249b28a38b651 SHA-1: fcb29557760aba74f6a5ddb06b4c09590a5044fa SHA-256: 66889d3f837ea31883211cc712e47d22dc1cb177cc238e1ac030991075999532
126 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. The document contains numerous external links, many hosted on disposable domains, suggesting a link farm or phishing operation. The presence of embedded URLs and the overall structure point towards an attempt to redirect users to malicious sites, likely for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://botokaw.ru/wix?keyword=farm+games+unblocked PDF link annotation
    • http://kidupat.getenjoyment.net/mineral_and_chemical_admixtures.pdfIn PDF document text
    • http://logawedulukudan.mywebcommunity.org/dozabitoxazoxi.pdfIn PDF document text
    • http://pemufosapakem.mypressonline.com/the_hobbit_changes_from_book_to_movie.pdfIn PDF document text
    • http://zoxodur.sportsontheweb.net/the_rocking_horse_winner_symbolism.pdfIn PDF document text
    • http://dreabling.online/inocencia_interrumpida_pelicula_completa_en_espaC3B1olf3zvf.pdfIn PDF document text
    • http://lishop.site/dan_brown_the_lost_symbol_audiobook_youtubedrlj8.pdfIn PDF document text
    • http://bivitajuteje.mypressonline.com/5932684257.pdfIn PDF document text
    • http://tuvosudokalidu.scienceontheweb.net/basics_of_biblical_hebrew_grammar_second_edition.pdfIn PDF document text
    • http://wovuwukotuvoxi.mygamesonline.org/bexusinajivoretuv.pdfIn PDF document text
    • http://velesvoyage.ru/51508887372arg2o.pdfIn PDF document text
    • http://sevagawos.getenjoyment.net/90361197504.pdfIn PDF document text
    • http://tibetterrier.ru/ipod_nano_2nd_generation_2gb_manualp908y.pdfIn PDF document text
    • http://wubowobipevoto.mywebcommunity.org/circulatory_system_of_amphioxus.pdfIn PDF document text
    • http://brumbum3.xyz/55071133753gpcrl.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://supuwevul.atwebpages.com/21747519184.pdfIn PDF document text
    • https://7c8f45b7-e058-4e27-bccd-8ee7dcb26900.filesusr.com/ugd/d5cf39_17077b122f1643a19f320f7b17fccbef.pdf?index=trueIn PDF document text
    • https://5c71d6b4-13b5-43a2-97a4-9a0eba4d0f4d.filesusr.com/ugd/0f1814_8aa37b8d3a454e7f80137337a77b84cc.pdf?index=trueIn PDF document text
    • http://rewuwuja.onlinewebshop.net/basic_algebra_and_geometry_formulas.pdfIn PDF document text
    • http://jafixomedimun.onlinewebshop.net/jesoriv.pdfIn PDF document text
    • http://nejesezape.myartsonline.com/universidad_del_tolima_programas_de_pregrado.pdfIn PDF document text
    • https://55d63786-14d6-44de-84d0-33f1fb383c44.filesusr.com/ugd/45fd81_26ff8e915c744f77975c6e97230b804a.pdf?index=trueIn PDF document text
    • http://gevejonitu.onlinewebshop.net/elgato_hd60_s_capture_card_setup.pdfIn PDF document text
    • http://mojigoka.atwebpages.com/1009186475.pdfIn PDF document text
    • http://tizexazebubo.atwebpages.com/90636592998.pdfIn PDF document text
    • http://fuvuxejuv.myartsonline.com/pelex.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ecc0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECC0 5420 bytes
SHA-256: 12dbe164272a9ad0d5c6992ae738d7888687a983c6d809386b94763db9ec5f72
font_01_sfnt_off0000ff18.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF18 11208 bytes
SHA-256: f29b28f8b00b471a66c731bf6ab6ac3e7cc6d288af8194ef5df3cf4ff7a7d464

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