Malicious PDF — malware analysis report

Static analysis result for SHA-256 c03c18f0af4532c4…

MALICIOUS

PDF

42.1 KB Created: 2020-11-08 19:20:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-23
MD5: 97610ef0e08fa434e0b80d7491d9780b SHA-1: 58b7a0584db6b49232ec1a998f28454d687958bf SHA-256: c03c18f0af4532c42549a03d30be372224cb75d450294a58b535dc615bdd8d04
66 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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://trafffe.ru/123?keyword=equation+of+area+of+a+semicircle PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4375071/normal_5fa7af1bbb9ee.pdfIn PDF document text
    • https://xironudobavus.weebly.com/uploads/1/3/4/4/134461104/c05504db.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366000/normal_5f884a8d15628.pdfIn PDF document text
    • https://gewosawoma.weebly.com/uploads/1/3/0/7/130739201/2048316.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465705/normal_5fa3e4b9e6ed5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376372/normal_5f89a90c8210c.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://nazegegufozu415813245.files.wordpress.com/2020/11/sociology_of_education_questions_and_answers.pdfIn PDF document text
    • https://lulagapo.files.wordpress.com/2020/11/68624631580.pdfIn PDF document text
    • https://mivepir.files.wordpress.com/2020/11/the_cask_of_amontillado_questions_an.pdfIn PDF document text
    • https://sovikakeko.files.wordpress.com/2020/11/36412823474.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dca1555e-6e96-40db-bc79-7ef1c391b54c/zurimoxinojubikogod.pdfIn PDF document text
    • https://gefavene.files.wordpress.com/2020/11/kaoru_ishikawa_aportaciones_a_la_calidad.pdfIn PDF document text
    • https://pujewose.files.wordpress.com/2020/11/61428140625.pdfIn PDF document text
    • https://jororox.files.wordpress.com/2020/11/67529088064.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_off00006497.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6497 5112 bytes
SHA-256: 86a665aa98a22625918d53a21ed7c16aaa03ce7cd1fcd5ef5753046cdbd26819
font_01_sfnt_off000075f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x75F2 11244 bytes
SHA-256: f3b06945126141a007b3f092a433acb77d84264f091b6a411574c4731f411441