Malicious PDF — malware analysis report

Static analysis result for SHA-256 a703d48a7ac3dc72…

MALICIOUS

PDF

71.0 KB Created: 2021-02-06 12:05:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 0435d934003f230dbfecc8c1bb9e7d7d SHA-1: 1e6b4083f32f48ec1af70c4ed3faf9c6f36fb40f SHA-256: a703d48a7ac3dc72d27707bae8e94012094328b7c744d2bca4c8d836005440be
184 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • 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://crophysi.ru/wb?keyword=five%20senses%20worksheets%20free%20printable In PDF document text
    • https://cdn.sqhk.co/fubafonu/giiKYih/smash_toys_touhy.pdfIn PDF document text
    • http://fb-ig-copyright.com/53304522852jgmub.pdfIn PDF document text
    • https://cdn.sqhk.co/foroboreb/iar7OfB/rockville_underseat_subwoofer_review.pdfIn PDF document text
    • http://prizinsta.info/wikuwulimaronusazukajedinqbjm3.pdfIn PDF document text
    • http://rawenspant.online/absolute_standards_in_performance_management_systems3vlsa.pdfIn PDF document text
    • http://safagiko.iblogger.org/anari_all_song_bestwap.pdfIn PDF document text
    • http://zinobinipote.22web.org/21265371681.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4409098/normal_5fcdb35c20e66.pdfIn PDF document text
    • https://cdn.sqhk.co/padasagam/cifZggx/hearts_card_game_free_download_for_windows_7.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4417137/normal_5ff5f07dc9c70.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4411503/normal_600823bd72bb2.pdfIn PDF document text
    • http://bigonetudukori.iblogger.org/domuxodu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4377933/normal_5fff73fd0ec83.pdfIn PDF document text
    • https://cdn.sqhk.co/gadewekunel/ifShdKL/73576219975.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zunonaselopa.rf.gd/karuppusamy_kuthagaitharar_cut_songs_free.pdfIn PDF document text
    • http://legofovivaxom.epizy.com/first_rank_raju_2019_full_movie.pdfIn PDF document text
    • http://wevikokuzufos.epizy.com/agar._io_mod_apk_2._3._1.pdfIn PDF document text
    • http://jovurafop.epizy.com/zerojusukiju.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_off0000d784.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD784 5300 bytes
SHA-256: d47b68d57142e926fac877a400886f8c8887ef8f6b43b3609ec222237d7ad7cb
font_01_sfnt_off0000e99d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE99D 11208 bytes
SHA-256: 89ded827cfcb09dd9eb73b1188da7a9394e1c7ce4f4d612399cfea401d71a207

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