Malicious PDF — malware analysis report

Static analysis result for SHA-256 cb8726caf51abf07…

MALICIOUS

PDF

303.6 KB Created: 2022-03-11 16:46:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-05-09
MD5: 8eefea2271b16970386840adbfe753c9 SHA-1: a9e96222d9de818c64444e5a34daf9644b9d612c SHA-256: cb8726caf51abf07e0246acd3f6cefe72057dfb80b97598928fcc877fb31af76
166 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.7195

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://fecuq.co.za/XSRYdR1H?utm_term=horizontal+line+word+format PDF link annotation
    • https://leicht-spb.ru/wp-content/plugins/super-forms/uploads/php/files/73898c26cdd201e485315e13d2e67a12/20650791923.pdfIn PDF document text
    • http://www.grupotresa.com/uploads/kcfinder/upload/files/75863249117.pdfIn PDF document text
    • http://www.nbaindia.nic.in/includes/ckeditor/plugins/kcfinder/upload/files/zepokefejimokona.pdfIn PDF document text
    • https://thegioidongphuc.net/ckfinder/userfiles/files/xomagezipilutosoduzigiz.pdfIn PDF document text
    • http://mediacast.vn/ckeditor/upload/files/dasudelunosuvusezora.pdfIn PDF document text
    • https://xn----8sbkgjdl3aku5f.xn--07-6kc3bf4angc2g.xn--p1ai/files/files/jalevunupu.pdfIn PDF document text
    • http://self119.net/upload/userfiles/2022/03/files/220311185208.pdfIn PDF document text
    • https://kp-bs.ru/upload/files/kezivabamazuretese.pdfIn PDF document text
    • http://montazenabytkupraha.cz/files/file/nileditep.pdfIn PDF document text
    • https://dm288.com/slicice/file/51327215924.pdfIn PDF document text
    • http://www.mecateengenharia.com.br/ckfinder/userfiles/files/rarilesada.pdfIn PDF document text
    • http://prometric.ir/admin/upload/files/25971885068.pdfIn PDF document text
    • http://klavierunterricht-bergedorf.de/files/files/24102736636.pdfIn PDF document text
    • http://www.maderas-navarro.com/ckfinder/userfiles/files/9468204513.pdfIn PDF document text
    • http://expresskaliski.info/file/zobodutunavota.pdfIn PDF document text
    • http://snbedu.com/uploadfile/file///2022021304133442.pdfIn PDF document text
    • http://vlajkylevne.cz/UserFiles/File/najuzofogoworugu.pdfIn PDF document text
    • https://etonbio.com/newsLetters/images/file/20301753043.pdfIn PDF document text
    • https://fp-004.flexxmedien.com/flexxtrader/data/usf/file/wexuma.pdfIn PDF document text
    • http://dgkno.cn/upload/piranozoruwapijakuxetikew.pdfIn PDF document text
    • http://sibmaxi.ru/userfiles/file/38331844436.pdfIn PDF document text
    • http://ttlengenharia.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/162246f8ce48fa---tarevov.pdfIn PDF document text
    • http://teknis.it/userfiles/files/wilog.pdfIn PDF document text
    • http://arieslog.com/assets/ckeditor/kcfinder/upload/files/tepawimagoxitifu.pdfIn PDF document text
    • https://mercerapparelss.com/userfiles/files/10279548774.pdfIn PDF document text
    • https://alarrabnews.com/images/content/content/file/bolekoge.pdfIn PDF document text
    • http://solyaris.pro/admin/ckfinder/userfiles/files/zokebokage.pdfIn PDF document text
    • https://creativesilhouettes.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16222faa672427---51346928168.pdfIn PDF document text
    • https://fizjolech.pl/userfiles/file/mituwawexuxunake.pdfIn PDF document text
    • https://cpc-serbia.org/js/files/87174658625.pdfIn PDF document text
    • http://elcastillotucentrotextil.com/imagenes/contenido/files/niwasevudasod.pdfIn PDF document text
    • http://woykoff.hu/upload/file/nagelidelijagezajev.pdfIn PDF document text
    • http://zbigniewrodak.pl/galeria/file/vuzudiradonu.pdfIn PDF document text
    • https://duongthuy.net/userfiles/file/26735354434.pdfIn PDF document text
    • https://communicationscharlevoix.com/admin/kcfinder/upload/files/19279104806.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 extracted file (font_00_sfnt_off0004525f.bin)
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn extracted file (font_00_sfnt_off0004525f.bin)

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0004525f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4525F 16560 bytes
SHA-256: 924ad5cb737cfd9a34472b2046831991df4d3950e5f0d7b552a18309318c2ee9
font_01_sfnt_off0004697a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4697A 17440 bytes
SHA-256: c63ca9ceefb9bb3d840e85002be2527d8dcb769e2a6d2ead157454bbccd0482c
font_02_sfnt_off000496e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x496E8 10484 bytes
SHA-256: 916fa8d590ce1a6f14788d56114bc5f941f156bcb1d1222361e636bb45f662bd