Malicious PDF — malware analysis report

Static analysis result for SHA-256 f572850450451418…

MALICIOUS

PDF

70.0 KB Created: 2021-01-28 05:21:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-01
MD5: ade7e2e7669e3d7b98171de6e14ffbbe SHA-1: bf94fb3d79c8467fea8496d2ae116ad6da07f75b SHA-256: f5728504504514187f1d5a770d328c8a64b8137b5bc0edfaeb8550f95a3b019b
244 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
  • 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 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.
  • 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://yafferge.ru/shook?utm_term=strikers+1945+world+war+guide In PDF document text
    • https://static.s123-cdn-static.com/uploads/4459774/normal_5fcb08657f0b3.pdfIn PDF document text
    • https://cdn.sqhk.co/sarafogu/jgjigjR/92166035326.pdfIn PDF document text
    • https://kupujusurigov.weebly.com/uploads/1/3/4/4/134471221/48c629.pdfIn PDF document text
    • https://rekepepijo.weebly.com/uploads/1/3/4/0/134018016/nomoropojowad.pdfIn PDF document text
    • https://cdn.sqhk.co/zupitefa/ZMahbjh/chessboard_offline_2-_player_free_chess_apps.pdfIn PDF document text
    • https://cdn.sqhk.co/zamokaxu/hfhchas/toketarotuvagupekari.pdfIn PDF document text
    • https://cdn.sqhk.co/pafevola/gchesje/22346725081.pdfIn PDF document text
    • https://cdn.sqhk.co/jakovenuz/KjgFgiO/38278404523.pdfIn PDF document text
    • https://cdn.sqhk.co/lenufetimop/geFz5ec/perfect_icing_for_cake_decorating.pdfIn PDF document text
    • https://cdn.sqhk.co/kinibemazoz/qhcwjdE/hd_wallpapers_for_macbook_pro_13_inch.pdfIn PDF document text
    • http://wurijudopala.22web.org/24353620052.pdfIn PDF document text
    • https://gotenalonas.weebly.com/uploads/1/3/4/3/134372716/2ae82b3146fd1.pdfIn PDF document text
    • https://cdn.sqhk.co/gafisasiwu/1jaEjjB/kimezatajaziwudonetivi.pdfIn PDF document text
    • https://cdn.sqhk.co/webepinovet/ig0gelt/16312921671.pdfIn PDF document text
    • https://cdn.sqhk.co/bixatavafut/Lgd2Njh/free_stuff_on_craigslist_in_merced.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://bujazux.rf.gd/jquery_ajax_form_data_type.pdfIn PDF document text
    • http://nufagogofuj.epizy.com/31147329458.pdfIn PDF document text
    • http://wivoruremuwun.rf.gd/44582356416.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_off0000d506.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD506 5672 bytes
SHA-256: 4a4cebd8d93b59f76d11174d2043e31e667f980d8815e8506991210af2085cdc
font_01_sfnt_off0000e883.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE883 10344 bytes
SHA-256: 1d644fb404e98d96ae9e19c28e59cfff930da598c1ccc9f9cc93a0116e5a1cb4

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