Malicious PDF — malware analysis report

Static analysis result for SHA-256 c5fe4a54291382c7…

MALICIOUS

PDF

42.0 KB Created: 2020-11-08 04:43:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-03-01
MD5: aed1c187ada663aa8627264ea7c3f0b3 SHA-1: cf9fe942a2467eb9229d78fde4673c95c057f6eb SHA-256: c5fe4a54291382c706b002d0d2569762ccd38f4a49a3cba77378b2abcf0e085f
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://trafffi.ru/123?keyword=apple+tv+code+for+roku PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4401555/normal_5f93221d7df96.pdfIn PDF document text
    • https://falizuzu.weebly.com/uploads/1/3/4/5/134506804/d99fef3a348.pdfIn PDF document text
    • https://sekojeti.weebly.com/uploads/1/3/4/5/134583019/julimepiw_bexobifo_xegud.pdfIn PDF document text
    • https://megeleju.weebly.com/uploads/1/3/4/3/134319984/nisesitugozuzatipaxa.pdfIn PDF document text
    • https://fawefugixizim.weebly.com/uploads/1/3/1/3/131383791/353343.pdfIn PDF document text
    • https://xasigali.weebly.com/uploads/1/3/4/3/134363336/fiwamurixu-rurukowiteto-soxaxerakik-rofaposizuw.pdfIn PDF document text
    • https://topagagi.weebly.com/uploads/1/3/4/3/134337746/5620273.pdfIn PDF document text
    • https://dirigesibujov.weebly.com/uploads/1/3/0/9/130969991/tofevujefi-jidabim.pdfIn PDF document text
    • https://dimaxafazeza.weebly.com/uploads/1/3/1/4/131453031/caa64.pdfIn PDF document text
    • https://jubunukaf.weebly.com/uploads/1/3/1/4/131483214/4e0ec8f6ec.pdfIn PDF document text
    • https://riwitasaroxaga.weebly.com/uploads/1/3/4/6/134656256/2881564.pdfIn PDF document text
    • https://pujuferot.weebly.com/uploads/1/3/4/6/134657525/a3c10.pdfIn PDF document text
    • https://befakudi.weebly.com/uploads/1/3/4/5/134595811/3849969.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370071/normal_5f88149c3411e.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/mubefula/alexander_graham_middle_school_cms.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_off000065af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x65AF 4876 bytes
SHA-256: 4e1af1b67414820d8cb226d895101e2331bcf7396a5f525170dba5dc816f08eb
font_01_sfnt_off00007665.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7665 10716 bytes
SHA-256: b5ed59176be25a05d112a87871a8c4c32d5f3b6aacb3adea23c4e495654c195f