Malicious PDF — malware analysis report

Static analysis result for SHA-256 634d139bdb24afcc…

MALICIOUS

PDF

298.7 KB Created: 2022-03-03 15:36:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-04-29
MD5: a713215d34e5581ae068450d9c5a824f SHA-1: f46f705f1ffda8c672bfec0b6b745a5834fdc7a8 SHA-256: 634d139bdb24afcc8d3a3c27395cb39acec5289e5b512e333c8a87e94070624d
166 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.6618

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
  • 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.
  • 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://atx-stroy.ru/wp-content/plugins/super-forms/uploads/php/files/883f8e48ac1fd7b6806eb2652704c5d9/79178043387.pdf In PDF document text
    • http://www.pernosgalvanizados.com/imagenes/editor/file/zelagiponixokosu.pdfIn PDF document text
    • http://riviera.az/userfiles/file/gexajo.pdfIn PDF document text
    • http://finchamauto.com/pics/80699203392.pdfIn PDF document text
    • http://ivankotov.ru/img/lib/file/80308805239.pdfIn PDF document text
    • http://www.whirlpool-beachcomber.at/wp-content/plugins/formcraft/file-upload/server/content/files/1620d8d44c146b---38121646596.pdfIn PDF document text
    • http://tplustech.com/images/ckeditor/files/3566634415.pdfIn PDF document text
    • http://formasrl.com/admin/kcfinder/upload/files/xutofeburelukupo.pdfIn PDF document text
    • http://7m-shop.godyouoh.com/userfiles/file/deral.pdfIn PDF document text
    • http://krokodilok.hu/_user/file/89796790513.pdfIn PDF document text
    • https://lesura.net/userfiles/file/12894462381.pdfIn PDF document text
    • http://saoz.sk/assets/kcfinder/upload/files/73222784465.pdfIn PDF document text
    • https://stiglic.sk/userfiles/file/dopuginaturisuvix.pdfIn PDF document text
    • https://marcel.myagenda.cz/pictures/editor/files/kawuf.pdfIn PDF document text
    • https://srldirect.com/ckfinder/userfiles/files/542603178.pdfIn PDF document text
    • https://armour-technoz-ca.otzol.net/ckfinder/userfiles/files/93438440546.pdfIn PDF document text
    • http://roseeskin.com/userfiles/file/20220226204620.pdfIn PDF document text
    • http://radis-rrl.ru/userfiles/image/dosukopeganef.pdfIn PDF document text
    • https://agefrance.thpservices.com/documentos/file/55840715537.pdfIn PDF document text
    • http://localhomesales.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16202b42c97d5a---sokinejame.pdfIn PDF document text
    • https://landtop.com/filespath/files/20220214053704.pdfIn PDF document text
    • https://rodolphe-blanchet.fr/Rodolphe/fckeditor/file/79628122990.pdfIn PDF document text
    • http://janaturismointegrato.com/uploads/file/zajirigasos.pdfIn PDF document text
    • https://sweetestspaparty.com/wp-content/plugins/formcraft/file-upload/server/content/files/1620a9f7a6e066---gurufofizu.pdfIn PDF document text
    • http://protech-t.hu/kcfinder/upload/files/maxajitavobuxebutelivol.pdfIn PDF document text
    • https://www.ccps.mx/wp-content/plugins/super-forms/uploads/php/files/59487eebde2ec79e733f46bacc18f9fc/27783952391.pdfIn PDF document text
    • http://hajostanfolyam.hu/admin/kcfinder/upload/files/turoxebamurusofodimabo.pdfIn PDF document text
    • https://cyberbirddog.com/userfiles/files/jajij.pdfIn PDF document text
    • http://fszhenjia.com/upfolder/e/files/20220228045012.pdfIn PDF document text
    • https://dianthusindustrial.com/resimler/files/zularagefef.pdfIn PDF document text
    • https://fecuq.co.za/XSRYdR1H?utm_term=raster+to+vector+converter+software+freePDF 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 extracted file (font_00_sfnt_off000435a4.bin)
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn extracted file (font_00_sfnt_off000435a4.bin)

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000435a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x435A4 16560 bytes
SHA-256: 924ad5cb737cfd9a34472b2046831991df4d3950e5f0d7b552a18309318c2ee9
font_01_sfnt_off00044cbf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x44CBF 20636 bytes
SHA-256: 9e55b25172175e25a3c0613874910d7e9de3332f5b3cad13cbf2258f6895cbf6
font_02_sfnt_off0004834c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4834C 10388 bytes
SHA-256: 407b94d2e911da4eda5beaf34d1d42311c7a9fa2ecc5ae1164e4aba9143437cf