Malicious PDF — malware analysis report

Static analysis result for SHA-256 b4783ec93864f95d…

MALICIOUS

PDF

41.4 KB Created: 2020-10-10 14:14:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 4e016f73b2d87dd076f02a6cd9090176 SHA-1: 2d3c3927840d9c7433aae0d44bc944b8168cf616 SHA-256: b4783ec93864f95debf6424d207259a5f303b96318066e9f05f22476ce8f328b
124 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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://gettraff.ru/strik?keyword=catalasa+en+el+higado In PDF document text
    • http://files.lionhearttalent.com/uploads/1/3/1/1/131164236/1662856.pdfIn PDF document text
    • http://files.muskogeecreativesoul.com/uploads/1/3/1/0/131070525/wakukumusewifir_pesokekifun_pazodarozilux.pdfIn PDF document text
    • http://files.bunkybambino.com/uploads/1/3/0/7/130738799/8064413.pdfIn PDF document text
    • https://site-1043292.mozfiles.com/files/1043292/rukivavuxokekekoladano.pdfIn PDF document text
    • https://site-1038669.mozfiles.com/files/1038669/xoxamapijadawitebeke.pdfIn PDF document text
    • https://site-1037253.mozfiles.com/files/1037253/temewevatamuwetipinarifid.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/2908/6887/files/7315885622.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/1241/3847/files/mermaid_clip_art_black_and_white.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0480/1793/2437/files/32434572183.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0485/6584/6176/files/quickbooks_pro_2016_write_off_bad_debt.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0501/2609/4496/files/62334431519.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/479bb130-025b-406b-bc9e-413c7cc4a132/57947300557.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e3f427a8-9bba-4b23-b658-814747a5adfe/80637097789.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cb57dd32-6d2e-4fcb-a424-ef8eced69833/85225671472.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/55488413-1c9e-41bd-b2bb-b383aaebf31c/73354610821.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_off00006346.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6346 4896 bytes
SHA-256: 115e55b00de7399d4f31aaf92496440c5549eda6cc19d71eb738f4676adc0028
font_01_sfnt_off000073e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x73E0 11076 bytes
SHA-256: 3d88e670c4dcebaad72e96672a1e1a1b5ffc09476b89b187de900890408bcff0

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