Malicious PDF — malware analysis report

Static analysis result for SHA-256 a8bc5b249e31e2b5…

MALICIOUS

PDF

41.0 KB Created: 2020-11-09 00:47:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-04-06
MD5: 71db6051a300478842640a72cb88799a SHA-1: 7f754334b7c162e02e9fa0661762a556f4e47f0e SHA-256: a8bc5b249e31e2b5413e017913fb7cbec7c99038c347591d52d5072596dc2ba6
136 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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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/wb?keyword=dodge%20durango%20hellcat%202018 PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4365591/normal_5f871790333c5.pdfIn PDF document text
    • https://s3.amazonaws.com/gebaxovudofe/writing_checks_worksheets_printable.pdfIn PDF document text
    • https://wojeribexojuxu.weebly.com/uploads/1/3/1/8/131856158/f69c54b05a74943.pdfIn PDF document text
    • https://kokexofagisukop.weebly.com/uploads/1/3/2/7/132710589/nigoxelero-renasurivoxej-laxerixawe-zejepalew.pdfIn PDF document text
    • https://s3.amazonaws.com/genedesowul/8054361016.pdfIn PDF document text
    • https://xonuveviriniw.weebly.com/uploads/1/3/0/7/130738603/jilikukuje.pdfIn PDF document text
    • https://s3.amazonaws.com/napejaxosinages/antimanual_de_filosofa_de_michel_onfray.pdfIn PDF document text
    • https://jorimedazaget.weebly.com/uploads/1/3/0/7/130738946/6697967.pdfIn PDF document text
    • http://www.ascendercorp.com/In extracted file (font_00_sfnt_off00005df9.bin)
    • http://www.ascendercorp.com/typedesigners.htmlIn extracted file (font_00_sfnt_off00005df9.bin)
    • https://uploads.strikinglycdn.com/files/6b6f3e66-dfa1-425e-b793-973c9d3b00ac/heritage_theatre_perry_utah_tickets.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7274782b-df43-4282-83c9-d3a739af9b94/jubovut.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4719a631-4db1-4af6-af81-98f80d7b63ff/vowemilowi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1b1125a8-ad36-4660-8284-fde3771221b3/zupugujoxemuze.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7ff158c7-2f4e-44b7-8440-eaf43a58b706/tasoraporefigifowas.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 extracted file (font_00_sfnt_off00005df9.bin)

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005df9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5DF9 5540 bytes
SHA-256: a1894640b6c5d36ad8b61200491edf31923476a22670031fabd8e6af46f3346a
font_01_sfnt_off000070d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x70D3 11268 bytes
SHA-256: d89dd842ca943aad89aee1ed8783bc4ae42d4f223d2b3e2de32490552e7c7643