Malicious PDF — malware analysis report

Static analysis result for SHA-256 4af58d520ef13b2d…

MALICIOUS

PDF

249.5 KB Created: 2022-03-10 18:26:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-06
MD5: bf765f43364996eee407cd002a9bb599 SHA-1: 891408e30239bc66669b8b93b5f573d9001db110 SHA-256: 4af58d520ef13b2d186821610e5e0d9deb9f08f1f3450d418bab8978577b6860
174 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.7006

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
  • 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.
  • 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.
  • 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://tevav.co.za/XSRYdR1H?utm_term=inverse+functions+math+worksheets+go PDF link annotation
    • http://bishalfurniture.com/assets/kcfinder/upload/files/jovojiximesu.pdfIn PDF document text
    • http://linpus.com/app/webroot/userfiles/files/22116773804.pdfIn PDF document text
    • http://brilspa.ro/userfiles/file///72367898214.pdfIn PDF document text
    • https://kotypsy.pl/ckfinder/userfiles/files/xetewuso.pdfIn PDF document text
    • http://www.sg-callenberg.de/wp-content/plugins/formcraft/file-upload/server/content/files/161fcfd3f8d690---42829389294.pdfIn PDF document text
    • http://togclick.com/media/userFckfiles/file/noripumi.pdfIn PDF document text
    • http://bep-au-cong-nghiep.theonejsc.com/userfiles/file/55068467707.pdfIn PDF document text
    • http://www.peretprod.ro/content-images/file/44192547997.pdfIn PDF document text
    • http://elenasteele.com/wp-content/plugins/formcraft/file-upload/server/content/files/162020fa709e8b---somiketif.pdfIn PDF document text
    • http://erbaytag.com/resimler/files/nokivukofiwabowipunuzo.pdfIn PDF document text
    • http://anonelectronics.com/admin/fckeditor/editor/filemanager/connectors/php/upload_jpg/file/202202042017447805.pdfIn PDF document text
    • http://rayer.cn/d/files/jijoxefuxidarugijerokemo.pdfIn PDF document text
    • https://0955205219.jwa.tw/userfiles/files/48083312937.pdfIn PDF document text
    • http://www.valathors.com/ckfinder/userfiles/files/xutiletejubawonusil.pdfIn PDF document text
    • http://www.deep2001.com/images/library/File/giforanejuduvalejonotom.pdfIn PDF document text
    • https://atpl.aero/ckfinder/userfiles/files/nunuzupopunegujarofugaz.pdfIn PDF document text
    • http://konyaozgunmobilya.com/userfiles/file/sovomobelikifinubabi.pdfIn PDF document text
    • https://robertmatzuzi-massagetherapist.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16220046450e33---zirejijaduzudimusumuzip.pdfIn PDF document text
    • http://skkl.cn/filespath/files/20220214080238.pdfIn PDF document text
    • http://architecturalconcept.be/kcfinder/upload/files/71500606632.pdfIn PDF document text
    • https://xn----8sbkgjdl3aku5f.xn--07-6kc3bf4angc2g.xn--p1ai/files/files/dotudekipufubawasomuwa.pdfIn PDF document text
    • http://lanaecoloridabruzzo.it/userfiles/file/81738027375.pdfIn PDF document text
    • http://futuralagoparking.eu/userfiles/files/26399354152.pdfIn PDF document text
    • http://friulanamarmi.it/images/file/37267692332.pdfIn PDF document text
    • http://skkouty.cz/ckfinder/userfiles/files/godadubo.pdfIn PDF document text
    • https://garmin1.ddbseven.cl/userfiles/file/13002392114.pdfIn PDF document text
    • https://holocaustresearch.pl/nowy/photo/file/41838381714.pdfIn PDF document text
    • http://bonezi.morefriendship.com/upload/files/64882184331.pdfIn PDF document text
    • http://www.oftalmed.com.br/files/ckeditor_custom/kcfinder/upload/files/diwogijaxo.pdfIn PDF document text
    • http://eske.hu/wp-content/plugins/formcraft/file-upload/server/content/files/16216981249be6---95211872280.pdfIn PDF document text
    • https://wildarium.com/ckfinder/userfiles/files/68754613922.pdfIn PDF document text
    • http://chronoflex-dz.com/app/webroot/assets/js/kcfinder/upload/files/1038325349.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#Referenced by PDF JavaScript
    • http://purl.org/dc/elements/1.1/Referenced by PDF JavaScript
    • http://ns.adobe.com/pdf/1.3/Referenced by PDF JavaScript
    • http://ns.adobe.com/xap/1.0/Referenced by PDF JavaScript
    • http://ns.adobe.com/xap/1.0/mm/Referenced by PDF JavaScript
    • http://ns.adobe.com/xap/1.0/rights/Referenced by PDF JavaScript
    • 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_off00037624.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x37624 16560 bytes
SHA-256: 924ad5cb737cfd9a34472b2046831991df4d3950e5f0d7b552a18309318c2ee9
font_01_sfnt_off00038d3f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x38D3F 18180 bytes
SHA-256: 2f1a623d2dbae62d3d4e91591c5a78ac9d7f77edf07b1df28645a3c5b045c8f1
font_02_sfnt_off0003bcee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3BCEE 11032 bytes
SHA-256: 6a571b550c7e979f019b5d52112fe716b5e5008d114bee5b6f12e6e53355bbe5