Malicious PDF — malware analysis report

Static analysis result for SHA-256 52ed5251fb4c3a7c…

MALICIOUS

PDF

78.6 KB Created: 2021-04-01 22:54:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 643fb06bca593872a468d22e5b4c96a9 SHA-1: 7167f98bf36080681b128d9ac662a79b091db978 SHA-256: 52ed5251fb4c3a7cb02db2b69d397dbc44b7726def79624f5eb098e23616f4af
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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
  • 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://mezovuduw.ru/123?utm_term=offline+civilization+game+android PDF link annotation
    • https://bufopajej.weebly.com/uploads/1/3/5/9/135956722/daduwu.pdfIn PDF document text
    • http://tepugorotewole.medianewsonline.com/is_disney_plus_available_for_samsung_tv.pdfIn PDF document text
    • https://marezupudi.weebly.com/uploads/1/3/0/8/130874377/jonamasamef_pizev_wuxafolu_vazuguzitoxiv.pdfIn PDF document text
    • http://sowakibevima.22web.org/nunitajukitamefitom.pdfIn PDF document text
    • http://dazolovegom.mygamesonline.org/analisis_psicologico_de_la_pelicula_el_maquinista.pdfIn PDF document text
    • http://cmbespaceclient.xyz/lovecraft_s_untold_stories_collector_s_edition_ps4vlbtk.pdfIn PDF document text
    • http://cenderaoriginator.com/2nd_grade_math_games_for_the_classroom934dy.pdfIn PDF document text
    • http://totalcreditcheck.info/32571432859p7ro0.pdfIn PDF document text
    • http://ita-bio.space/pioneer_mosfet_50wx4_instruction_manualzo3ms.pdfIn PDF document text
    • https://gabanifuvumot.weebly.com/uploads/1/3/4/5/134588994/7110575.pdfIn PDF document text
    • http://fesotisifofil.mygamesonline.org/sobotta_atlas_of_human_anatomy_16th_edition.pdfIn PDF document text
    • http://opit.space/acpc_flower_cross_pollination_guidej37ec.pdfIn PDF document text
    • http://vaxisezawoged.scienceontheweb.net/dante_purgatorio_canto_xi.pdfIn PDF document text
    • http://bovosidifusu.iblogger.org/how_to_reset_typewriter.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/vifusupegiza/asp.net_mvc_5_custom_404_page.pdfIn PDF document text
    • http://wovodijulenape.onlinewebshop.net/cria_de_ganado_bovino.pdfIn PDF document text
    • http://teposekif.epizy.com/referat_anemia_defisiensi_besi_pada_anak.pdfIn PDF document text
    • http://rowezezivifa.epizy.com/aashiqui_2_movie_dialogue_ringtone.pdfIn PDF document text
    • https://s3.amazonaws.com/tozaduliwubega/bissell_rewind_cleanview_pet_upright_bagless_vacuum_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/lulelepese/employee_registration_form_template_word.pdfIn PDF document text
    • http://tegiledo.epizy.com/tirepi.pdfIn PDF document text
    • https://s3.amazonaws.com/vuxalirudidel/syntactic_analysis_the_basics.pdfIn PDF document text
    • https://s3.amazonaws.com/neporezofov/android_tv_browser_keyboard.pdfIn PDF document text
    • http://miripiwamaza.epizy.com/insuficiencia_placentaria.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_off0000f5c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5C7 5300 bytes
SHA-256: c75fee5c75383fa15d765a474b485cfcf8c8ef14f11c293cbbfbf5d9259f4886
font_01_sfnt_off000107ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107CA 10404 bytes
SHA-256: cad6e52b203459fc59f92b1526c01c3dd93386f6f85d3c8a72b90cf801f49400

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