Malicious PDF — malware analysis report

Static analysis result for SHA-256 18b4a8eaaf316904…

MALICIOUS

PDF

70.7 KB Created: 2021-02-27 05:45:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: 181473a4550f06cd7c1560b3bad04ac9 SHA-1: de79d3a24ff41cf1a7303f9bc9968684a59ce2f7 SHA-256: 18b4a8eaaf316904d0a1388c52d1ba14fc9912a8b1f0493740e1a36236df6a28
184 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://dafemum.ru/wix?keyword=blundstone+fit+guide In PDF document text
    • https://zusajozaza.weebly.com/uploads/1/3/1/3/131381142/ab6828be07d93.pdfIn PDF document text
    • http://pijakonojimuw.iblogger.org/harry_potter_book_review_in_hindi.pdfIn PDF document text
    • https://cdn.sqhk.co/vavewiren/W5Tjgjh/zopusuzizilol.pdfIn PDF document text
    • http://zopetiwan.22web.org/what_kills_athletes_foot_fungus_on_surfaces.pdfIn PDF document text
    • https://fanizoliboligom.weebly.com/uploads/1/3/1/0/131070566/keguw.pdfIn PDF document text
    • http://tameeniraq.com/honeywell_wifi_thermostat_manualjfzve.pdfIn PDF document text
    • http://makedctl.site/jan_broberg_book5sezy.pdfIn PDF document text
    • https://cdn.sqhk.co/wametofenuwo/fhcu4jj/domino_s_menu_discount_codes.pdfIn PDF document text
    • http://generatorsale.ru/shoot_em_up_2007_trailerxpzup.pdfIn PDF document text
    • https://cdn.sqhk.co/puzadowoke/2OQhahb/kunaxaraxefudowituvisisa.pdfIn PDF document text
    • http://optamorem.com/wufasezoselateek8mc.pdfIn PDF document text
    • http://mavpa.fun/material_science_and_engineering_bookyuahw.pdfIn PDF document text
    • https://mugibamarenov.weebly.com/uploads/1/3/4/1/134109107/ab72e09b68d2729.pdfIn PDF document text
    • https://cdn.sqhk.co/sanevujaguda/pifpBhh/26447172751.pdfIn PDF document text
    • https://cdn.sqhk.co/tefazaturar/ggghxjg/fps_gun_shooter_counter_terrorist_shooting_games.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://buzanokekeb.epizy.com/auditorium_chair_cad_block_free.pdfIn PDF document text
    • https://s3.amazonaws.com/norozovijalu/36638304858.pdfIn PDF document text
    • https://s3.amazonaws.com/zeworibuzoza/97962139442.pdfIn PDF document text
    • http://lunigapevero.epizy.com/what_are_two_major_differences_between_a_viral_infection_and_a_bacterial_infection.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_off0000db50.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB50 4816 bytes
SHA-256: 0ead7fd2207f81cbeac9e9573b35f16b3f08b8689cbf46997db94bcd085e5c64
font_01_sfnt_off0000ebd2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBD2 10004 bytes
SHA-256: 64f41192acb1c5e7f00ed0b4e82a7dac1e39ebbcaacff93f5037930f02270da9

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