Malicious PDF — malware analysis report

Static analysis result for SHA-256 cfd5bbf308c5c4e1…

MALICIOUS

PDF

166.3 KB Created: 2021-04-05 08:59:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 11910d0953d11b8a6b752075538b253a SHA-1: 9c0937aefc179d855d23f025727fe5fb4f98bed6 SHA-256: cfd5bbf308c5c4e1792336e9edbe30e595d671d4a73ed228e5c65a743cf2ac77
66 Risk Score
Tags
free-cdn-ebook-manual-lure

Machine Learning

  • Nyx PDF Classifier malicious score 0.9987

Heuristics 4

  • 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://botokaw.ru/wix?keyword=limits+and+continuity+worksheet+doc PDF link annotation
    • http://kositexujir.sportsontheweb.net/55330092018.pdfIn PDF document text
    • http://sufulilutidake.mypressonline.com/42503083467.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481164/normal_604f40a02c5c8.pdfIn PDF document text
    • https://cdn.sqhk.co/gujamozulas/Qjaeii4/59301558110.pdfIn PDF document text
    • https://cdn.sqhk.co/jorevagu/iqdlaib/miduvujunuliton.pdfIn PDF document text
    • https://cdn.sqhk.co/vamunidibu/iaigeFm/laladopux.pdfIn PDF document text
    • http://naxuvazexipok.sportsontheweb.net/9933777697.pdfIn PDF document text
    • https://cdn.sqhk.co/vebapejun/jb2zejh/idle_mine_rpg_guide.pdfIn PDF document text
    • https://cdn.sqhk.co/tasokuxu/gjgfHjd/incremental_backup_script_in_bash.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486220/normal_60223ea8d02e2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371505/normal_6027ec41a444a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4454163/normal_5ff54681b4457.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zowofiz.myartsonline.com/similarities_between_abraham_lincoln_and_andrew_johnson.pdfIn PDF document text
    • https://76b44699-1094-4fd8-8d4a-70b7be8159c3.filesusr.com/ugd/c450b2_43c0c9bf278b4093b6842c6a62019d72.pdf?index=trueIn PDF document text
    • https://dd907c4b-492b-4b4d-bf3c-9f0b7a2bd2c7.filesusr.com/ugd/96a426_09d9c90b7858431aa95e4a5d509b6da3.pdf?index=trueIn PDF document text
    • https://6376acfe-5884-4251-b3d5-19a03c044549.filesusr.com/ugd/de3d83_17443b2c2b2e46f3a4aa67db3a2317fa.pdf?index=trueIn PDF document text
    • https://7737876a-f762-42ef-af6f-18b78abacabf.filesusr.com/ugd/9066bd_85a8a9e711ea40c2893e0e15a8f9a4c9.pdf?index=trueIn PDF document text
    • https://5405d108-7f1e-482b-a10c-e06f62b7505d.filesusr.com/ugd/d941b1_cbbacf162ece47418deb9191f5097dbb.pdf?index=trueIn PDF document text
    • https://ad060920-74d0-4a59-a46a-f478898ed72a.filesusr.com/ugd/a7c1e6_12718a100a9345a8b12eabd65579da1a.pdf?index=trueIn PDF document text
    • https://33da92c3-26de-4f6b-bf12-1693cb6a6e79.filesusr.com/ugd/0307f2_743e573e05584cba8135d7a74dc8b0a3.pdf?index=trueIn PDF document text
    • http://bitujiduruv.myartsonline.com/gafunorotuxunitif.pdfIn PDF document text
    • https://b9a4c3d6-4ccf-4d04-9b0f-c2e9c357e15d.filesusr.com/ugd/e5cbe5_128c873240f843bda90f6184aec3c5b7.pdf?index=trueIn PDF document text
    • http://kivozusemu.atwebpages.com/nofeleranofavebudom.pdfIn PDF document text
    • https://ab2ac9d4-4772-4872-829d-c19fde0a4f90.filesusr.com/ugd/b919b3_adc82744253c4adb9f345a6768177d92.pdf?index=trueIn 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_off00024fdc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x24FDC 5348 bytes
SHA-256: afe77394a0619bc9f4ee978314e76182995005c35a076dc1f2f621a0a28fe396
font_01_sfnt_off000261f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x261F8 12064 bytes
SHA-256: b9613905058f9412f847859e5fd5d90e4dc1a32a5f0b5d291fdc84987789786b

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