Malicious PDF — malware analysis report

Static analysis result for SHA-256 b537f927e1e4f841…

MALICIOUS

PDF

73.5 KB Created: 2021-02-28 13:30:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: d43e246429fa33d9b99f62e30cbd76a5 SHA-1: dfb04c8f097ce10627d965b6a37cd7780378c0bf SHA-256: b537f927e1e4f8412f98d39e0ada94cc35e416c1d57c5721aecf461658776b98
184 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://dafemum.ru/award?keyword=what+are+the+5+themes+of+geography+and+examples In PDF document text
    • https://cdn.sqhk.co/parabeset/ahjheET/happy_birthday_cake_image_gift.pdfIn PDF document text
    • http://woxijakuzadajew.getenjoyment.net/nagav.pdfIn PDF document text
    • http://rafupofamurawaf.mygamesonline.org/36846346201.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4382638/normal_600654f335752.pdfIn PDF document text
    • http://bestita.space/9525990568f6cun.pdfIn PDF document text
    • https://cdn.sqhk.co/wunokebewoz/gjhgdib/40623351295.pdfIn PDF document text
    • http://sijubuwejipamun.mywebcommunity.org/burger_king_spicy_chicken_sandwich_jr_calories.pdfIn PDF document text
    • http://dehydratedoriginalgoodness.com/27666833241pyt8.pdfIn PDF document text
    • http://pop-marketplace.ru/2018_toyota_highlander_hybrid_maintenance_schedulekvl3n.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4411512/normal_6011c5eeebe82.pdfIn PDF document text
    • http://hairhome.moscow/zitebajebugasetokadana4b7td.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4449417/normal_5fcf4a57ee1a7.pdfIn PDF document text
    • http://punavuvipufov.sportsontheweb.net/tipos_de_funciones_ejercicios_resueltos.pdfIn PDF document text
    • http://fenellalucynelle.info/die_bremer_stadtmusikanten_mrchen_textdtdgg.pdfIn PDF document text
    • https://cdn.sqhk.co/sinewuvemomi/6gjjhZh/jasagij.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_off0000e1ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1EA 5760 bytes
SHA-256: ca266ced455a49b5f41537c8f68e96a58b55e9634eaa2330d3d5c7c7b2d4dcc9
font_01_sfnt_off0000f576.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF576 10496 bytes
SHA-256: 3e237ad91ab789b1b2117cb062b4b5966f2e1fbd08cd3f6919c702bbd9c8ce61