Malicious PDF — malware analysis report

Static analysis result for SHA-256 5a12b5911e82af04…

MALICIOUS

PDF

73.9 KB Created: 2021-09-16 09:05:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-05-31
MD5: a5bc8f469be13f7173797367cc006e4e SHA-1: 1f36dd376764abe40da8a2503fc9f19f28b4c813 SHA-256: 5a12b5911e82af048b5bb3a10abddab73a4994c6552d27b5410bed1e4029744d
164 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://archism.ru/uplcv?utm_term=mod+apk+for+mobile+legends PDF link annotation
    • https://vidaleve.ind.br/ckfinder/userfiles/files/xumamuxotejazolufekebel.pdfIn PDF document text
    • http://phaptangpgvn.net/app/webroot/upload/files/tikixigolopir.pdfIn PDF document text
    • http://retrievers.su/ckfinder/userfiles/files/bolewidib.pdfIn PDF document text
    • http://www.kotolantopeni.cz/files/17867936946.pdfIn PDF document text
    • http://yoron.net/up/files/23618491643.pdfIn PDF document text
    • http://phone-server.com/userfiles/file/79456864766.pdfIn PDF document text
    • http://mayjack.com/upload/files/xupunasajafepup.pdfIn PDF document text
    • http://kpotplace.com/uploads/files/sopaguluvizexi.pdfIn PDF document text
    • https://www.rongoldmanlaw.com/system/js/back/ckfinder/userfiles/files/mowamutupusukegexazeroxuz.pdfIn PDF document text
    • https://998.geektic.com/geektic/files/34941725188.pdfIn PDF document text
    • http://www.koeru.eu/failid/file/41477273898.pdfIn PDF document text
    • https://ntc-container.com/upload/files/jokekovebenogumomofup.pdfIn PDF document text
    • https://wfca-czech.cz/temp/userfiles/files/sizabosuv.pdfIn PDF document text
    • http://stroytehcentr.ru/images/file/sirafowekuwaminafibikux.pdfIn PDF document text
    • https://areshin.ru/wp-content/plugins/super-forms/uploads/php/files/a57ab8c0de144c87e11e5b9a140e3a5e/42126602652.pdfIn PDF document text
    • http://koreaticketland.com/userfile/file/kisilazo.pdfIn PDF document text
    • https://genegurumiraclehealer.com/userfiles/file/vubekenafef.pdfIn PDF document text
    • http://intrinhgia.com/admin/webroot/upload/image/files/pizisejiwivetuvir.pdfIn PDF document text
    • http://countryclaim.cz/userfiles/file/detavonevokif.pdfIn PDF document text
    • https://lakecountyoralsurgery.com/wp-content/plugins/formcraft/file-upload/server/content/files/16131b7aa01014---28333430843.pdfIn PDF document text
    • https://gk-termopanel.ru/wp-content/plugins/super-forms/uploads/php/files/4d7c4e6d474c5239c24e3ba928875e20/82519023214.pdfIn PDF document text
    • http://mestan.by/images/file/wovix.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000bdf9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBDF9 16848 bytes
SHA-256: 06e1fe0d5b5094a3a983c701e73407e781aa240886cc0faaa1be83dfb812a04d
font_01_sfnt_off0000e910.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE910 10968 bytes
SHA-256: 5865c996305722b4a97ceb29c83acd2d41e8ba04b273d81c03c969bc68771571
font_02_sfnt_off00010204.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10204 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1