Malicious PDF — malware analysis report

Static analysis result for SHA-256 287095be70e16d76…

MALICIOUS

PDF

41.6 KB Created: 2020-11-09 08:23:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-15
MD5: 52c96e987ed585060d90a573045a5f87 SHA-1: c4bb181037b22ffea47bc6710a66f7d09720dd9c SHA-256: 287095be70e16d768d775064d285ddd057f860e4ace2bc221c0ab73c53a0e162
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://traffine.ru/123?keyword=sentinel+guide+city+of+heroes In PDF document text
    • https://danizodeker.weebly.com/uploads/1/3/4/5/134581754/7984373.pdfIn PDF document text
    • https://tivagojeno.weebly.com/uploads/1/3/4/7/134714391/8716886.pdfIn PDF document text
    • https://garegijewavib.weebly.com/uploads/1/3/4/3/134389285/2180944.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373297/normal_5f9a41cf66fc0.pdfIn PDF document text
    • https://kinojapi.weebly.com/uploads/1/3/2/3/132302846/rodupidulanowed_bitevala_pofaxusu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410199/normal_5f9d118ed2550.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369629/normal_5f8ce4e9264b0.pdfIn PDF document text
    • https://momaramurelu.weebly.com/uploads/1/3/4/3/134309976/f373759e5c7e7.pdfIn PDF document text
    • https://repugonajipivup.weebly.com/uploads/1/3/0/8/130814926/1415014.pdfIn PDF document text
    • https://namokokesovu.weebly.com/uploads/1/3/4/4/134480524/jigag-jixezosenaduko-sunisodosara-jibetaze.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://vofalop.files.wordpress.com/2020/11/the_famished_road_theme.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/469d08b4-f105-4cc5-994a-5fee0f6d60ee/powusuzidoje.pdfIn PDF document text
    • https://pozaxatugifu.files.wordpress.com/2020/11/wikatusakuvos.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/739f81d0-19f3-4ce2-b648-0212f168d5a6/mesosatiworiwujef.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/784824b8-ee7b-4d1f-834e-8b65fa30c9db/66444433510.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_off000064e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x64E9 5276 bytes
SHA-256: 48b56051eb5ae4d061f24861ba20c6e9c56d3787ca9fef5eb0f4d6b515c56dec
font_01_sfnt_off000076e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x76E8 10220 bytes
SHA-256: 9170e56f90805ed4d005971ebf8b28c609b477fd9c932bf764b00d4648ef4efd

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