Malicious PDF — malware analysis report

Static analysis result for SHA-256 925516c833584d2b…

MALICIOUS

PDF

52.5 KB Created: 2020-11-06 17:11:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-23
MD5: 3ff70625e77f5ad9fbb2369779b1f21b SHA-1: 5f84ed0c5a6ab0e619480dc72a69c76d7aa90535 SHA-256: 925516c833584d2b062b4311f40133eeb37518adecb3e00f79c3c70468b1b1fa
126 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://traffset.ru/123?keyword=explain+localization+of+function+in+the+brain PDF link annotation
    • https://fawurefo.weebly.com/uploads/1/3/4/4/134441885/3187328.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367937/normal_5f889f4dec1e0.pdfIn PDF document text
    • https://saxibodusazo.weebly.com/uploads/1/3/0/7/130740440/xupanada-jakitivabukejim-vedogozunaluna.pdfIn PDF document text
    • https://xaniwunedevivat.weebly.com/uploads/1/3/4/4/134470123/3169837.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4401505/normal_5fa02b9ab9e3e.pdfIn PDF document text
    • https://wipaluxeko.weebly.com/uploads/1/3/4/3/134346688/xozojezijepeje_wogavabul.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366011/normal_5f8778fb6a8a7.pdfIn PDF document text
    • https://defagetomorig.weebly.com/uploads/1/3/4/5/134576552/82b43.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421051/normal_5f9be5c816952.pdfIn PDF document text
    • https://sizukejagu.weebly.com/uploads/1/3/2/6/132681884/8176664.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/0847f62e-4b9d-4743-a423-064c63241761/zakegojobivugibupotosime.pdfIn PDF document text
    • https://s3.amazonaws.com/sugaguxagu/modelo_biomedico_vs_modelo_biopsicosocial.pdfIn PDF document text
    • https://s3.amazonaws.com/kavitokolezub/bodybuilding_workout_chart.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a8aabaad-4c31-483d-929d-628c98e6796e/6187002300.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000822a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x822A 5020 bytes
SHA-256: 3cb15023fdade1529731b9739ab6569a1ea07472a9884988b2f4570337d1dd5e
font_01_sfnt_off00009339.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9339 10224 bytes
SHA-256: 8a650cec3d414519ed3040371916b08057a95a42b63b17ef7e18577ecc36160b
font_02_sfnt_off0000b640.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB640 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

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