Malicious PDF — malware analysis report

Static analysis result for SHA-256 4af0728d6207f465…

MALICIOUS

PDF

147.6 KB Created: 2021-12-04 12:43:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-06
MD5: f241c24c5efae8272bd419af86d23fb3 SHA-1: c41183ce432bdd52cac0a2355f0cbc0cbc4b2cf4 SHA-256: 4af0728d6207f465fc8efbfe60991f4e8faa90fc2e57d875fccc2902ee4bbb68
156 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9590

Heuristics 6

  • 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.
  • 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://ketchas.ru/uplcv?utm_term=volume+of+pyramids+and+cones+maze+answers PDF link annotation
    • http://ramadin.com/userfiles/file/kegix.pdfIn PDF document text
    • http://tcihk.com/userfiles/rusokilikusufokedukefum.pdfIn PDF document text
    • https://xn----8sbaavnccwq4am.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/3a75e9221d9200b74887cc56afde7d45/476161893.pdfIn PDF document text
    • https://braindevelopmentmaps-org.neurondevelopment.org/userfiles/files/turiderikumatepim.pdfIn PDF document text
    • http://resumesfromabove.com/userfiles/file/7871701445.pdfIn PDF document text
    • https://dsodrecital.com/wp-content/plugins/formcraft/file-upload/server/content/files/1618d65086fe87---40341877028.pdfIn PDF document text
    • http://tiquital.com/documentos/file/notefilelakozug.pdfIn PDF document text
    • http://radio6deenero.com/uploaded/files/90333130526.pdfIn PDF document text
    • http://studiogaleazzo.eu/userfiles/files/90750037045.pdfIn PDF document text
    • https://www.ciabrini-immobilier.com/wp-content/plugins/super-forms/uploads/php/files/sptjnp6ndfehqoqrj48dt3hsu6/1804679678.pdfIn PDF document text
    • https://sdhouse.info/ckfinder/userfiles/files/63987150869.pdfIn PDF document text
    • https://portoggitter.no/content/files/userfiles/file///nixabubekigonorudi.pdfIn PDF document text
    • https://rallstarawards.us/nbloom/fckuploads/file/37177415962.pdfIn PDF document text
    • http://nabsangram.com/userfiles/file/mujovefesamutimasod.pdfIn PDF document text
    • http://club-integra.ru/userfiles/file/36478545066.pdfIn PDF document text
    • https://implantologie-deva.ro/app/webroot/files/userfiles/files/nekixonajeduburasetad.pdfIn PDF document text
    • https://rinducm1.com/contents/files/jaluv.pdfIn PDF document text
    • http://suliaok.com/v15/Upload/file/2021104137561107.pdfIn PDF document text
    • http://maxitelt.no/wp-content/plugins/formcraft/file-upload/server/content/files/1614441a557259---tujatup.pdfIn PDF document text
    • https://familienbilstrup.dk/userfiles/file/rifexo.pdfIn PDF document text
    • https://anciensite.ville-rouillac.fr/docs/file/74674872158.pdfIn PDF document text
    • http://xn--80aaeiengkwpz6p.xn--p1ai/pub/file/88963236566.pdfIn PDF document text
    • https://xtrafitcoaching.com/www/images/files/baforifiwekezavigadujewu.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_off0001ddb9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1DDB9 18932 bytes
SHA-256: e45e0783a98bb370dd53e784120b9c694b4d75b4c39f858a97450e5e9accdc57
font_01_sfnt_off00020efa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x20EFA 16416 bytes
SHA-256: cfa2c3fbce80cc5607e01af033b793d17c57c214fb1d96e845eedea48cccd336
font_02_sfnt_off0002259e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2259E 11012 bytes
SHA-256: 7869410b5ff085d09f2e3fb395b40f1ee6b5391c52475f3c075f0b37df25e5fb