Malicious PDF — malware analysis report

Static analysis result for SHA-256 624f2f3bf0acadd2…

MALICIOUS

PDF

79.1 KB Created: 2021-02-26 10:42:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: 8644d0da33e2ef576dbf3eead7895604 SHA-1: e577eed123d2e21c4bcf9b260de65b104be0ca92 SHA-256: 624f2f3bf0acadd2c73ef0972369869a4dbfc31b959f3146e55a761c5fb8835b
186 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://midufefew.ru/123?utm_term=is+ice+breakers+gum+bad+for+you PDF link annotation
    • https://cdn.sqhk.co/kajutizikodu/jJGhamq/14015949746.pdfIn PDF document text
    • http://leadtop.co/bujukozewopufezebugodetownwy9.pdfIn PDF document text
    • https://cdn.sqhk.co/nuduniguwufo/jiicbja/nizodirogosumagufozugez.pdfIn PDF document text
    • http://manovina.mypressonline.com/5376961221.pdfIn PDF document text
    • http://olymp-trade.top/91846462080ewjdu.pdfIn PDF document text
    • http://jadogaxarabu.mygamesonline.org/dungeons_and_dragons_modules_for_beginners.pdfIn PDF document text
    • http://boldly-grow.com/20507373347ch2b3.pdfIn PDF document text
    • http://ig-copyrightnotice.com/tiniboguvumuvewusezu310mv.pdfIn PDF document text
    • https://cdn.sqhk.co/somupojebif/hiegdto/cafe_racer_seat_pan_install.pdfIn PDF document text
    • https://cdn.sqhk.co/xojelumegasi/gdjchcI/download_flight_sim_2018_mod_apk_revdl.pdfIn PDF document text
    • https://poxesaxe.weebly.com/uploads/1/3/0/7/130738711/5893603.pdfIn PDF document text
    • http://zememor.sportsontheweb.net/94344822652.pdfIn PDF document text
    • https://cdn.sqhk.co/divojimo/a4D1Qgg/sojotifuledudifi.pdfIn PDF document text
    • http://penageli.getenjoyment.net/resumen_del_libro_mil_soles_esplendidos_por_capitulos.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://kopolug.myartsonline.com/fikutopelowujiv.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_off0000f9d8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9D8 5552 bytes
SHA-256: 78fcbcd7bc21771373ea1cbea12d11e573c538db64fd9f09cb5efef170689b48
font_01_sfnt_off00010cb1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10CB1 10236 bytes
SHA-256: c2a9d28562cd7e75c0dd31c1fbaeb207d176cc088dcf4f4db9992eff8ab48742