Malicious PDF — malware analysis report

Static analysis result for SHA-256 367ac9376dfea0c9…

MALICIOUS

PDF

36.8 KB Created: 2020-10-16 03:48:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 7fb83c441edcb798eec8f43e3a5c9e0f SHA-1: 308970949fdee043ef97634969bb926ec47e5a63 SHA-256: 367ac9376dfea0c9b40d34ceb83f67aeb05a0aeb41418be47490ba6b0f75cf24
184 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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 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.
  • 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://cctraff.ru/123?keyword=flora+flipfont+apk+2020 In PDF document text
    • https://site-1044105.mozfiles.com/files/1044105/50058586502.pdfIn PDF document text
    • https://site-1039132.mozfiles.com/files/1039132/ruromeno.pdfIn PDF document text
    • https://site-1043764.mozfiles.com/files/1043764/82289810387.pdfIn PDF document text
    • https://site-1039948.mozfiles.com/files/1039948/jixexamuxeginitaj.pdfIn PDF document text
    • https://site-1038890.mozfiles.com/files/1038890/1816134147.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368221/normal_5f87646f835e2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365659/normal_5f88ecb4d328f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365598/normal_5f87ff749831b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367952/normal_5f88d94ea007f.pdfIn PDF document text
    • https://site-1037907.mozfiles.com/files/1037907/70006628048.pdfIn PDF document text
    • https://site-1043289.mozfiles.com/files/1043289/como_hacer_publicidad_en_facebook.pdfIn PDF document text
    • https://site-1043153.mozfiles.com/files/1043153/remunifuwamufuraza.pdfIn PDF document text
    • https://site-1042969.mozfiles.com/files/1042969/6352404716.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/46d02c1d-5428-4486-a7ae-9ab1e8b1b032/74266203127.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cc5e5950-b05d-475c-a9d6-70521456fc29/roguwowarenewotemo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/56a33df9-c0fe-4aec-b1f5-33c97e408522/pagemitasodaw.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2fe17e5e-c172-4b19-ad79-9942065be10f/jelevekevirarum.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/466b2626-851f-4317-909f-e64c60f93fdc/26356835898.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/db4f56fe-c806-48d4-923f-239b5c07995c/18219142030.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6776/8981/files/tasalovurupunon.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/6316/0231/files/26220083456.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/0990/0184/files/composite_risk_management_worksheet_fillable.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_off0000510f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x510F 5012 bytes
SHA-256: d7dc042d300542aa9dad50aac4924a3fc983e4c11916b654e0299c80644e8693
font_01_sfnt_off0000622a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x622A 10036 bytes
SHA-256: 6e77ff8bfbb59b8e2029c08447a289c4890d909326c72d47dd2b8bde49d2d841

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