Malicious PDF — malware analysis report

Static analysis result for SHA-256 c16521c3fa370717…

MALICIOUS

PDF

72.8 KB Created: 2021-02-18 07:41:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 4f7fee54808afcc6ca0c89e1d1b400b7 SHA-1: 6a2a3b5a02eefb4da28603bcbaba784157ae723c SHA-256: c16521c3fa370717571379fad180ad1a9b35ea201d6a81cbcd594a3b9628c675
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://baarspo.ru/strik?utm_term=schlage+keyless+lock PDF link annotation
    • https://rofoxanubojinud.weebly.com/uploads/1/3/2/7/132740779/xebixomomo-xubur-zopobopim-dazakovawena.pdfIn PDF document text
    • http://anbieterbewertung-autoscoutch.com/free_cinquain_poem_templatebqhl9.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368962/normal_5fdd1cf7e4e4e.pdfIn PDF document text
    • https://cdn.sqhk.co/xumefotebe/e1RgjCq/dodemadasej.pdfIn PDF document text
    • https://cdn.sqhk.co/tosilura/4Eib4ps/among_us_online_no_download_or_install.pdfIn PDF document text
    • http://teplotronic.ru/fractura_5to_metatarsianoidyg0.pdfIn PDF document text
    • https://cdn.sqhk.co/jogepirar/hdhfqOk/3805885209.pdfIn PDF document text
    • http://batmbatm.ru/c._r._o_full_formu7go5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4493198/normal_600fdf3f31227.pdfIn PDF document text
    • http://dektesheff.xyz/mcsa_windows_server_2016_study_guide_exam_70-740_free_download5xac9.pdfIn PDF document text
    • https://zeteleginogegop.weebly.com/uploads/1/3/4/5/134526156/sisafudixeb.pdfIn PDF document text
    • https://cdn.sqhk.co/tipefima/gsibGuU/drumsy_peach_face.pdfIn PDF document text
    • https://cdn.sqhk.co/daxutoxod/e2icict/free_music_player_app_youtube.pdfIn PDF document text
    • https://cdn.sqhk.co/lunemitibojo/d5gegeY/rurimipu.pdfIn PDF document text
    • https://cdn.sqhk.co/kejofuvata/hedqie9/throne_of_blood_castle.pdfIn PDF document text
    • https://cdn.sqhk.co/dodazija/e0hjibQ/super_gaiden_pc_engine_rom2.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/gosete/tumbleform_platform_swing.pdfIn PDF document text
    • https://s3.amazonaws.com/pajukovuxetu/how_to_make_bold_letters_in_android.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_off0000e0b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0B9 5236 bytes
SHA-256: e64b66deafdc877fb8dd039fadcf5a081ba94a21cf6f19e292a8ebcd13681a34
font_01_sfnt_off0000f293.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF293 10472 bytes
SHA-256: ab89d66d17512ff69db9128ac1b1c024adfa05d0b2e0bc644afd7ecb55238b6f

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