Malicious PDF — malware analysis report

Static analysis result for SHA-256 af2b4fd75cee474f…

MALICIOUS

PDF

84.9 KB Created: 2021-09-18 08:29:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-21
MD5: 8c8687d251c2f0d5fa1c7441763f5276 SHA-1: 3e8a24bcfab17dedb2a921fb45e98473d7260e2f SHA-256: af2b4fd75cee474f5220ebc0bf2486dcc9536550b7a1864a6c5313611412c681
156 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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://vayamcs.com/content_files/files/suzapakalagujod.pdf In PDF document text
    • http://datavincity.com/uploads/ckfinder/files/rigobufiteronufurutobis.pdfIn PDF document text
    • http://polymer-optix.de/userfiles/file/19388264892.pdfIn PDF document text
    • https://www.gs-gleichmann.de/wp-content/plugins/formcraft/file-upload/server/content/files/16136c14475852---61649736968.pdfIn PDF document text
    • http://www.pacautomarketing.com/file/616962225.pdfIn PDF document text
    • https://adikkedua.com/contents/files/35565309735.pdfIn PDF document text
    • http://boonfagrandhome.com/user_img/files/xewewidedo.pdfIn PDF document text
    • http://ristoranteibucanieri.it/userfiles/files/nasuluketagexawig.pdfIn PDF document text
    • https://rebates.forex/wp-content/plugins/super-forms/uploads/php/files/blfnjtbguif4ej7f76872m09o3/37371903693.pdfIn PDF document text
    • http://trenermichal.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1613584300836a---22406309701.pdfIn PDF document text
    • http://hb-hospital.com/file_upload/fck_upfile/file/tiwuturiwenojurunojiliv.pdfIn PDF document text
    • https://ncfouting.com/wp-content/plugins/formcraft/file-upload/server/content/files/161364745b9f43---gorapeduze.pdfIn PDF document text
    • http://bestofbeer.ru/ckfinder/userfiles/files/3051269239.pdfIn PDF document text
    • https://ratsimae.ee/media/contents/file/jixili.pdfIn PDF document text
    • https://bokaichenyu.com/upload/files/vupinesulatoxunitajetero.pdfIn PDF document text
    • https://allegypttours.net/userfiles/files/nazapopijosomokegida.pdfIn PDF document text
    • http://www.samuitns.com/image/upload/File/88596162717.pdfIn PDF document text
    • https://thepetrichortouch.com/wp-content/plugins/super-forms/uploads/php/files/9p9hkh81uaiq6liij7u6b706m0/gokuponuz.pdfIn PDF document text
    • http://ridendo.cz/files/file/82960545099.pdfIn PDF document text
    • http://muntepa.com/userfiles/files/90239875418.pdfIn PDF document text
    • http://salsainkonstanz.de/media/files/waxuwi.pdfIn PDF document text
    • http://twapp.freshkon.com/upload/files/65818018345.pdfIn PDF document text
    • http://itaxabc.com/userfiles/file/20210902103204_661299615.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3CAf4wW3hvY/uplcv?utm_term=problema+con+teclado+androidPDF link annotation
    • 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_off0000e5a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5A7 10504 bytes
SHA-256: 2ecc2e07bd1e0aec2fb6444d89e13c5419b37fdcf9a27031061fbddaea76dc27
font_01_sfnt_off0000fd79.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD79 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001158b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1158B 18804 bytes
SHA-256: a749345889e1ea8aa665e0cb5d092d30eca7135d3f892a9f125aef3af5d9e494