Malicious PDF — malware analysis report

Static analysis result for SHA-256 0fb9023bafb4819b…

MALICIOUS

PDF

57.5 KB Created: 2020-11-07 10:58:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-11
MD5: da6e7c8f8afeabe88935dca9d96a8084 SHA-1: 206edeadeab3886281543457812507a789a10362 SHA-256: 0fb9023bafb4819bc657245f90173a57bc18f3f340cebca21077839f82543a82
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://trafficel.ru/aws?keyword=dragon+ball+episode+231 PDF link annotation
    • https://varipejat.weebly.com/uploads/1/3/0/7/130739080/kawidivipamafo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377647/normal_5f905cf244404.pdfIn PDF document text
    • https://vodexekuteb.weebly.com/uploads/1/3/0/7/130776001/nikusuz.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369486/normal_5f8922be3badf.pdfIn PDF document text
    • https://dasitonaz.weebly.com/uploads/1/3/4/3/134379343/90e5ae86d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4424007/normal_5f97defe2d0b8.pdfIn PDF document text
    • https://faxufoxexukixel.weebly.com/uploads/1/3/4/4/134455740/433acb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375885/normal_5f89bc1162c5e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367687/normal_5f88dcad70a8d.pdfIn PDF document text
    • https://xerukarikudi.weebly.com/uploads/1/3/4/3/134316935/dfd5e83971.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/f4a8130b-5066-447c-9380-d3831f708974/civ_5_best_mods.pdfIn PDF document text
    • https://vowobazimo.files.wordpress.com/2020/11/callese_y_venda_descargar.pdfIn PDF document text
    • https://s3.amazonaws.com/fatisake/1809898279.pdfIn PDF document text
    • https://suvarofora.files.wordpress.com/2020/11/lodebukiworidu.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_off00007a57.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7A57 11504 bytes
SHA-256: c5912d799fe4aad08cb66123cbdbcdc3f504e24f17fa491ada764d397f576d80
font_01_sfnt_off0000a079.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA079 5612 bytes
SHA-256: dbedb857e79f28260fdfa5d2b9fa926192143fd2f423fa5287f896074b1494b3
font_02_sfnt_off0000b39e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB39E 10540 bytes
SHA-256: b6a906f0206c0a9cc5a7a08f5fb8939e7c10a4b79703062ec3d6b3376491d7e3

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