Malicious PDF — malware analysis report

Static analysis result for SHA-256 c0efcaf22344bbd6…

MALICIOUS

PDF

37.9 KB Created: 2020-10-16 15:53:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 0b50502bb64a9666dd552e66ed397a7f SHA-1: 40ee0e23d411e3b6647e911e436eee278ebb8f4e SHA-256: c0efcaf22344bbd634af813c9d0ff4bd5f7f9b692cb4d5d69690ae9288d0b131
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/pify?keyword=desactivar+teclado+virtual+android In PDF document text
    • https://keniwuki.weebly.com/uploads/1/3/1/4/131483234/tebavu_mofevuz_punoxibera_gijipomole.pdfIn PDF document text
    • https://mogilifus.weebly.com/uploads/1/3/0/7/130739831/5401885.pdfIn PDF document text
    • https://jufaxexave.weebly.com/uploads/1/3/0/7/130775513/ziwozurugajijodasu.pdfIn PDF document text
    • https://zafozudakajadev.weebly.com/uploads/1/3/0/8/130814863/b628c54eef4e3.pdfIn PDF document text
    • https://pigogokeda.weebly.com/uploads/1/3/1/8/131857695/gapit-galijawijekinik-kedafel.pdfIn PDF document text
    • https://dofazodasi.weebly.com/uploads/1/3/0/8/130873943/wawizewimigaxen-liwikozeviz.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365606/normal_5f87dc521eef1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369304/normal_5f8916f76c4c0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365541/normal_5f87b994ab85a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365612/normal_5f8755fb62ce9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366319/normal_5f8766ea8ee5f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365655/normal_5f87265f4f55a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369491/normal_5f889e0022a4f.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/6073358e-a2bb-4b2c-a78f-f7e98428e9d8/20617146783.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/adc1ffa4-a4b7-4632-8b5e-4cff8258c865/30508796504.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3cf43adf-ad13-4418-b562-c389a2cb1f39/zuvabuku.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f637a44d-afc9-4c08-8fea-d5960a24a3f3/dosiwodidolikoxawovateb.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f3c62a6c-9af0-49ee-8d65-444a89d496c9/92648072635.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_off00005757.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5757 4992 bytes
SHA-256: 27ef3ebdf4d7bc0ded81242a11cf05330db20f2217694e1bc86062271edafdfc
font_01_sfnt_off0000685a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x685A 10036 bytes
SHA-256: 1ff10ca639c77930ff5f802461174d171e9150f11fc768264545b5e31ab492cc

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