Malicious PDF — malware analysis report

Static analysis result for SHA-256 2db92dab94d06b21…

MALICIOUS

PDF

82.0 KB Created: 2021-03-28 22:12:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e666f28a8e15e379a02abb7b01a9320d SHA-1: d3c5d86d0a6a4038dbdc053ca64249f74bafddd3 SHA-256: 2db92dab94d06b21fe5effc380c0556f7ccbfb744cc5b86ce6473d360673ac74
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF document contains numerous embedded URLs, many of which are hosted on disposable domains and appear to be part of a link farm designed to redirect users. The document body, though truncated, suggests a lure related to a common search query, likely intended to trick users into clicking malicious links. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution.

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://ponafet.ru/strik?utm_term=what+word+is+opposite+of+loneliness
    • https://luzatewuxajexi.weebly.com/uploads/1/3/4/2/134265782/bekikuwogijujak_davutefoxas_figakoje_gaparefofebipif.pdf
    • http://daating19.site/shootout_at_wadala_full_movie_watch_onlinezvuqt.pdf
    • http://wutugidejavazu.scienceontheweb.net/gelujowogumisuwebirapon.pdf
    • http://fawikenaxalu.scienceontheweb.net/46110417752.pdf
    • http://tiwilofojifig.sportsontheweb.net/solid_waste_management_meaning_in_marathi.pdf
    • https://tobalewaluwe.weebly.com/uploads/1/3/4/4/134437424/zaful.pdf
    • http://daimontimur.org/un_tranvia_llamado_deseo_online_castellanoc3wxh.pdf
    • http://hookup153.site/pewefuxojvm3rq.pdf
    • http://nutristrike-shop.ru/jiwepudusuwibdsc8h.pdf
    • http://thesimplycompleteseries.com/mainstays_desk_assembly74nea.pdf
    • https://kupelaranix.weebly.com/uploads/1/3/4/7/134729830/futuzotuw_filatokan_wepefeme.pdf
    • http://idealicacolumbia.site/bagufarupircci3.pdf
    • http://copyright-services-us.com/joxelenazetumoxajitaruwxpkc.pdf
    • http://rasprodavaika.ru/songs_played_in_after_we_collided_moviee4tke.pdf
    • http://muzoc.xyz/rekorirakovotanekibomujaj6ect3.pdf
    • http://carinsusa.info/spectrum_math_workbook_grade_8_free92cvz.pdf
    • http://salearea.pro/lizotevulogps78.pdf
    • http://cashbackmoney.info/19223241016d2rol.pdf
    • http://powajaxib.medianewsonline.com/casio_g-shock_atomic_solar_gps_watches.pdf
    • http://pek-24.cc/toyota_camry_2019_hybrid_specsd942t.pdf
    • http://idealica-uficiale.website/earn_2_die_unblockedamjh5.pdf
    • http://wejuzofibab.medianewsonline.com/93559289932.pdf
    • http://detonic-ro.website/18410982107tm0ri.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/buponuwebi/96681293855.pdf
    • https://s3.amazonaws.com/vososasoxumete/bemigusarukojexediguli.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001026d.bin
9598912038d72291093be001a9f938be4ac7a8d75e7e979f4b590be357863ef5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1026D 5232 bytes
font_01_sfnt_off0001144e.bin
542c52804bbc5c838f4818663077bda49d2ca7c2969c6e0b9901ee7c3f5c3f2f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1144E 10764 bytes

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