Malicious PDF — malware analysis report

Static analysis result for SHA-256 20f135975a064d52…

MALICIOUS

PDF

71.8 KB Created: 2021-02-14 15:36:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 6a57f3204807b84314702dbf0b5aeebc SHA-1: 01f4b6d8b44f7de91e12680589e753cacd080b0f SHA-256: 20f135975a064d52bd3674c7ef1837eef481b797ae5192d90157ba1ad1d037f0
184 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • 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 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://crophysi.ru/123?utm_term=view+index+shtml+near+me In PDF document text
    • http://srakan.space/matemticas_avanzadas_para_ingeniera_solucionariortdd6.pdfIn PDF document text
    • http://micrometerdigital.xyz/473269075637h3y2.pdfIn PDF document text
    • http://ovca.space/parker_condensate_pot_installation_guide1118v.pdfIn PDF document text
    • http://famojefefe.iblogger.org/vintage_70_s_platform_boots.pdfIn PDF document text
    • http://monoga.space/pill_reminder_app_android_source_codemwrh6.pdfIn PDF document text
    • http://letxxnx.org/minesweeper_solver_8x80c5l7.pdfIn PDF document text
    • http://instahelpforbusiness.com/78870423218upes6.pdfIn PDF document text
    • http://malespw.xyz/arriba_spanish_textbooku8o8a.pdfIn PDF document text
    • http://sell-toclick.online/cbx750p_service_manual5e81h.pdfIn PDF document text
    • http://com-signto6.xyz/59637998363boj5v.pdfIn PDF document text
    • http://swast-group.website/461938812959nzdm.pdfIn PDF document text
    • http://fishland.store/62965922719tr0ok.pdfIn PDF document text
    • http://dkmz2.club/shopify_pricing_guidefhklf.pdfIn PDF document text
    • http://moresukko.ru/sweet_sins_superstars_mod_apklwoxi.pdfIn PDF document text
    • http://cpskras.website/how_does_information_asymmetry_cause_market_failuretnt58.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000db26.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB26 5188 bytes
SHA-256: 3c1cbea835baecdd8be6c9d8b23c29c6add9ca65e0a4924c72e1140ab741eec5
font_01_sfnt_off0000ecb2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECB2 11420 bytes
SHA-256: d2289b81bfe39f3ab5d649c980adc0e01f6416b598c0d5c3986e1c590d6070fb