Malicious PDF — malware analysis report

Static analysis result for SHA-256 78bcd0a4ada5db79…

MALICIOUS

PDF

44.2 KB Created: 2020-10-16 13:37:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-10
MD5: 36ba290e5456b31ba390dafc23645b88 SHA-1: 56d10443e2647fb03e240e362a4cb7de36c9c19a SHA-256: 78bcd0a4ada5db79576d059c3a6fbc77a3ceb360c7f7cd60fef397177c166fbd
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=%25D1%2581%25D0%25BA%25D0%25B0%25D1%2587%25D0%25B0%25D1%2582%25D1%258C+%25D1%2580%25D1%2582%25D0%25BE%25D1%2581+%25D0%25B8+%25D0%25B0%25D1%2581%25D1%2583+%25D0%25B1%25D0%25B5%25D1%2581%25D0%25BF%25D0%25BB%25D0%25B0%25D1%2582%25D0%25BD%25D0%25BE In PDF document text
    • https://gimejexoxixaza.weebly.com/uploads/1/3/1/8/131872185/monirafulowafix.pdfIn PDF document text
    • https://wuvirinofibugiz.weebly.com/uploads/1/3/1/0/131070402/dibaxona_pokedukufufi_zafufed.pdfIn PDF document text
    • https://bedizegoresupa.weebly.com/uploads/1/3/1/3/131379398/lulodegoner.pdfIn PDF document text
    • https://lodirunesu.weebly.com/uploads/1/3/0/8/130874391/fumuligam_gabigudobejoje_gavavopufe.pdfIn PDF document text
    • https://kutenamig.weebly.com/uploads/1/3/0/7/130740069/d5b48097a778d01.pdfIn PDF document text
    • https://jiwadurator.weebly.com/uploads/1/3/0/7/130776405/2541291.pdfIn PDF document text
    • https://rakamukomegu.weebly.com/uploads/1/3/2/6/132681656/rinozeleb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367302/normal_5f889570971de.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366017/normal_5f873a331a5c3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366004/normal_5f88351a71d6a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366032/normal_5f871a832b0c5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369152/normal_5f884b0047d5f.pdfIn PDF document text
    • http://www.ascendercorp.com/In extracted file (font_00_sfnt_off00005def.bin)
    • http://www.ascendercorp.com/typedesigners.htmlIn extracted file (font_00_sfnt_off00005def.bin)
    • https://uploads.strikinglycdn.com/files/35c65f35-55f0-4b31-a585-d4c75f0e5ca5/raxevabi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/7467/7655/files/be_prepared_vera_brosgol_vk.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/5731/0615/files/minnesota_valley_canning_company_mascot.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0498/5277/6603/files/building_construction_rangwala_download.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_off00005def.bin)

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005def.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5DEF 5732 bytes
SHA-256: ac96dab5b2ff0785bb3ef1293c0c9ab8b145beb43c11398a6153764021814594
font_01_sfnt_off000070a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x70A9 15660 bytes
SHA-256: de93cc258bd82c6e8d02e4ba39711eaaf7f686ea931952322f5a75ddda9b540c

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