Malicious PDF — malware analysis report

Static analysis result for SHA-256 af21cef03a4570e0…

MALICIOUS

PDF

45.0 KB Created: 2020-10-17 15:44:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-21
MD5: f7b4cd2e8b058d54db771fec11741fb0 SHA-1: a1452fc8c06b62c452d8c528e35eca01d9c55367 SHA-256: af21cef03a4570e0157b6b0c9013bd9c9e5a071f58356f80e12631c98266572e
194 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.
  • 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.
  • 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://ggtraff.ru/wb?keyword=xbox%20uma%20sementes%20para%20minecraft%20pov In PDF document text
    • https://wekubuzebebam.weebly.com/uploads/1/3/0/7/130739705/voxiwaximimifugusadi.pdfIn PDF document text
    • https://zevigetadafuwun.weebly.com/uploads/1/3/0/9/130969942/5928710.pdfIn PDF document text
    • https://jatorogerujew.weebly.com/uploads/1/3/2/7/132710569/movew.pdfIn PDF document text
    • https://dowamiwimeguv.weebly.com/uploads/1/3/0/7/130775936/soxeranikija.pdfIn PDF document text
    • https://gapefupekud.weebly.com/uploads/1/3/1/8/131871489/42cc8f21.pdfIn PDF document text
    • https://jakedekokobara.weebly.com/uploads/1/3/1/3/131381480/divili_dapixi.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/1416/7965/files/zero_to_hero_anime_reddit.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/8661/8017/files/recumbent_cross_trainer_with_swivel_seat.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4864/8354/files/transparent_mobile_phone_png.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/9777/1176/files/petals_around_the_rose_riddle.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0502/2393/9753/files/nominalisierung_bungen_c1.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/998a1ce3-bd3b-4710-a147-4936d463e8ce/zedori.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0347c876-b718-4efe-9cb6-91f7eec64031/kosotutojugozog.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9770e44b-3cdc-4bf2-88aa-8efe23969a46/craftsman_router_manual_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1137/4230/files/the_birth_partner_-_cheat_sheet.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6405/7247/files/96351845353.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/7324/0739/files/lojaz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0492/9031/3884/files/middle_child_instrumental_free_download.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_off00006dc9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6DC9 5376 bytes
SHA-256: f4456d679e5575999a9138552b16c34868639fc850fead2e4a17a0d27582bfe8
font_01_sfnt_off00007ffd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7FFD 11520 bytes
SHA-256: 2c83bfbade485a328f6f1da86390e0b6302e7d30d99e2b519c024531dcacb06a

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