Malicious PDF — malware analysis report

Static analysis result for SHA-256 421fb91c7382c0b1…

MALICIOUS

PDF

43.3 KB Created: 2020-10-26 16:53:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-12-26
MD5: 2e4db347ce60790aa5e1d884aefdeff6 SHA-1: 8c0b1690b6af9922242dd6181328e8add40b907a SHA-256: 421fb91c7382c0b15034dadb86b80bab012458d98f0ca0b161deca055a29f627
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=double+action+spring+hinge+instructions In PDF document text
    • https://tovozilulu.weebly.com/uploads/1/3/0/8/130873983/zonezagurig.pdfIn PDF document text
    • https://nowigusoludi.weebly.com/uploads/1/3/4/2/134266380/2872660.pdfIn PDF document text
    • https://laguvibokabab.weebly.com/uploads/1/3/4/3/134383318/damepefaxedi_vazisisapuxo.pdfIn PDF document text
    • https://gibitiwatu.weebly.com/uploads/1/3/0/7/130776060/1365943.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380083/normal_5f8ac8f031ab2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380405/normal_5f95bb258282a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379355/normal_5f8df8d800439.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365584/normal_5f88c2247caa5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365636/normal_5f86f897924ec.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366044/normal_5f9392817f392.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384817/normal_5f8d2be8a5c55.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4411245/normal_5f9512107089c.pdfIn PDF document text
    • https://babinekisifuve.weebly.com/uploads/1/3/2/6/132696104/4582187.pdfIn PDF document text
    • https://wefamojugibe.weebly.com/uploads/1/3/1/1/131164519/zabodetajozojux.pdfIn PDF document text
    • http://www.ascendercorp.com/In extracted file (font_00_sfnt_off00006b21.bin)
    • http://www.ascendercorp.com/typedesigners.htmlIn extracted file (font_00_sfnt_off00006b21.bin)
    • https://cdn.shopify.com/s/files/1/0494/1116/2279/files/54576920816.pdfIn PDF document text
    • https://s3.amazonaws.com/gezetega/factores_psicologicos_en_la_obesidad.pdfIn PDF document text
    • https://s3.amazonaws.com/bajapovogam/64199459962.pdfIn PDF document text
    • https://s3.amazonaws.com/jagux/regepezasejavajegovudokid.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_off00006b21.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_off00006b21.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6B21 5332 bytes
SHA-256: 583635ceb2893535e14b25f17329fff28511914ddc461822cef4961d4b30a47a
font_01_sfnt_off00007d37.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7D37 10328 bytes
SHA-256: 6d46aefe57777007d516b57603d634f853dce7bd95607b62c0a0d583a6b47cf9

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