Malicious PDF — malware analysis report

Static analysis result for SHA-256 a7aa61dcb1f8f090…

MALICIOUS

PDF

67.0 KB Created: 2021-03-04 00:12:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 73caae8bcdfa5d5c21f894e0525560bc SHA-1: 4bedcbdf31200fe2e2f6e4c2d26f88f39d7cde7e SHA-256: a7aa61dcb1f8f0908c85c4e2ce47cf682d4077d1b5dd257ae762166897ca0e99
186 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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 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.
  • 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://seumenha.ru/wb?keyword=do%C3%B1a%20barbara%20capitulo%20187%20completo%20telemundo PDF link annotation
    • http://vabufagugelev.22web.org/16008656780.pdfIn PDF document text
    • http://fragcups.com/proyecto_de_generador_eolicoy97or.pdfIn PDF document text
    • http://bekasopeli.22web.org/say_something_lyrics_sheet_music.pdfIn PDF document text
    • https://cdn.sqhk.co/zowonefaso/ihhfvjf/slack_app_download_ubuntu.pdfIn PDF document text
    • http://saluzoz.iblogger.org/discovering_geometry_chapter_4_test_answers.pdfIn PDF document text
    • https://cdn.sqhk.co/jimavidozeze/HJggcic/keluja.pdfIn PDF document text
    • http://x-bionic.shop/which_metro_game_to_play_first_redditfeb8b.pdfIn PDF document text
    • http://eurozone.pro/gevirewiruwotesy4zf.pdfIn PDF document text
    • https://cdn.sqhk.co/naxupowu/sgfiaie/motorcycle_half_helmets_amazon.pdfIn PDF document text
    • https://getarejiviwos.weebly.com/uploads/1/3/4/6/134683174/e6155844e1.pdfIn PDF document text
    • http://universal-kirov.ru/hot_spot_spa_manual_2012jlbk9.pdfIn PDF document text
    • https://cdn.sqhk.co/mekerijiwuv/jjajcRF/police_radio_sounds_mp3.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://segalemu.epizy.com/prevention_of_atrocities_act_2016.pdfIn PDF document text
    • http://mupufekugix.epizy.com/why_is_margin_of_safety_book_so_expensive.pdfIn PDF document text
    • http://losikamadan.epizy.com/reporting_linear_regression_results_from_spss.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_off0000c65a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC65A 5720 bytes
SHA-256: 60fd028d2ff073425e30db2958f74cf5276a5cbab64b6036d1cf3c3fd1791d88
font_01_sfnt_off0000d974.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD974 10776 bytes
SHA-256: 1150716ef074c3cae652b11d4961efea9542527a7b4b90c91482f9599201b4b1