Malicious PDF — malware analysis report

Static analysis result for SHA-256 61465bb1e5e76798…

MALICIOUS

PDF

42.0 KB Created: 2020-10-27 17:53:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-12-26
MD5: d330b4fe9534c0eefa0caf1ebed9a295 SHA-1: 6aecc24bc0b978e5168be69ecf3fdc54f77187b2 SHA-256: 61465bb1e5e76798e3db6c332bceb32e71dda432b6ac2944b5b848d6ff8b279a
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/strik?keyword=google+sheets+margins In PDF document text
    • https://lixaworone.weebly.com/uploads/1/3/1/8/131871871/7738f4d129a92.pdfIn PDF document text
    • https://babikovinemixe.weebly.com/uploads/1/3/1/8/131856339/af04d84b.pdfIn PDF document text
    • https://guwomenod.weebly.com/uploads/1/3/0/8/130873843/lanadez.pdfIn PDF document text
    • https://tenabawik.weebly.com/uploads/1/3/2/7/132710661/2527536.pdfIn PDF document text
    • https://sevenunoxesu.weebly.com/uploads/1/3/4/3/134341304/4af745dac.pdfIn PDF document text
    • https://xekixudag.weebly.com/uploads/1/3/4/3/134336078/newijugapavu.pdfIn PDF document text
    • https://dedeluruxizo.weebly.com/uploads/1/3/4/3/134305162/wukevono-bapegonexejukal-mewutezizepelo.pdfIn PDF document text
    • https://pitamiled.weebly.com/uploads/1/3/4/0/134098016/jisuk_gojefu_xunovomeduzujok_junuzemopo.pdfIn PDF document text
    • http://www.ascendercorp.com/In extracted file (font_00_sfnt_off0000668a.bin)
    • http://www.ascendercorp.com/typedesigners.htmlIn extracted file (font_00_sfnt_off0000668a.bin)
    • https://uploads.strikinglycdn.com/files/40dbb363-d4b7-455b-b858-a844b65dc4f2/ritutexe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/931acf73-d177-4289-a882-1779a2a25cbe/fisujukaji.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b329079f-2e59-4e06-9383-d292cb75bb2a/thermodynamics_klein_solution_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/09432cb3-60f8-40b3-86dc-45fc4aedcc55/jaxemelozovuw.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ca5da67f-fa10-432b-a150-9d6418a0aeb5/82181947162.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/1954/1921/files/zanuludunej.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9087/0423/files/nuance_converter_8_free_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0495/9813/6472/files/jonuweteze.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/7029/9038/files/bimuleju.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0498/1319/2859/files/magnum_achievement_guide_osrs.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0479/6320/9884/files/mopixilafozujizag.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/40742c7a-6f42-4253-b5c7-3857e049c5e0/68269748097.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9864d83e-a772-4962-b0f8-a491f454a319/zivalotofelibigetenudub.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ff0c90cf-9cb5-4458-abf1-4938713b8abf/6056359708.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 extracted file (font_00_sfnt_off0000668a.bin)

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000668a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x668A 5128 bytes
SHA-256: 4fbb562be1d7dfdde4c1f83ea23a6e6847dc12439e17155982bfbabc3424f26c
font_01_sfnt_off000077de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x77DE 10236 bytes
SHA-256: 0082fa62c65c73350e253d41125fe5b8cb5692c33c4d1d797c169afb8336c1cf