Malicious PDF — malware analysis report

Static analysis result for SHA-256 28fd590136a96d91…

MALICIOUS

PDF

428.8 KB Created: 2022-03-05 14:51:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-05-16
MD5: a87805659b62f40fa40ed4ed698b867a SHA-1: ced8df487d23a8f2f1e0f435c8316d903a00e993 SHA-256: 28fd590136a96d9107b56ed77662ea0e037c57441d9bb354b798562d1761ab8c
136 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.5201

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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 http://hudebninastrojedrastik.cz/js/kcfinder/upload/files/lidevolusixasokusav.pdf In PDF document text
    • http://pecel-piok.hu/images/files/zozezexulemeditinod.pdfIn PDF document text
    • http://rybarict.cz/webpagebuilder/ckfinder/userfiles/files/renupomadizonadugaka.pdfIn PDF document text
    • http://hagelkonzept.de/userfiles/file/letoxelipudaposonax.pdfIn PDF document text
    • https://tsolisp.com/files/file/26858663126.pdfIn PDF document text
    • https://perfecthospitals.org/FCKeditor/file/madazeg.pdfIn PDF document text
    • http://prometric.ir/admin/upload/files/53772503050.pdfIn PDF document text
    • https://sport-jicin.cz/dokumenty/misofeluvep.pdfIn PDF document text
    • http://teenmag.cz/userfiles/file/18163741527.pdfIn PDF document text
    • http://hide-bo.com/img/tmp/file/65691428066.pdfIn PDF document text
    • https://hanedantoptan.com/upload/files/biwojipafog.pdfIn PDF document text
    • http://vietkinggroup.com/uploads/userfiles/file/tonunimupojunoje.pdfIn PDF document text
    • http://www.madiran-cruduparadis.fr/ckfinder/userfiles/files/30426212132.pdfIn PDF document text
    • http://apismorava.eu/docs/wifizivirapifan.pdfIn PDF document text
    • https://www.tri-or.fr/tri-or/ckfinder/userfilesfiles/19693051124.pdfIn PDF document text
    • http://bahtiyardishekimi.com/fckfiles/file/bazunuvonuxafibafeniku.pdfIn PDF document text
    • http://tuecpa.com/file_media/file_image/file/93663260282.pdfIn PDF document text
    • https://tekmaker.com/upload/files/22787688960.pdfIn PDF document text
    • http://grafika.szklo-lux.pl/nowa/userfiles/file/valitabutobigigololi.pdfIn PDF document text
    • http://audiomaster.se/wp-content/plugins/formcraft/file-upload/server/content/files/1620d7a4325ac1---liruwemonagedekudoxefuzim.pdfIn PDF document text
    • http://khamtrai.vn/userfiles/file/67193681570.pdfIn PDF document text
    • https://www.profiexpo.ru/js/kcfinder/upload/files/77580787929.pdfIn PDF document text
    • https://www.auditek.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1621d2b8917756---53658003926.pdfIn PDF document text
    • https://angkaganjil.com/contents/files/tawufezovagirosofisarom.pdfIn PDF document text
    • http://studioingegneriavaragnolo.com/userfiles/files/biwuk.pdfIn PDF document text
    • http://tsnpharma.com/upload/files/86811982329.pdfIn PDF document text
    • http://kutyakozmetikustanfolyam.hu/kcfinder/upload/files/529423471.pdfIn PDF document text
    • https://99shayari.in/userfiles/files/97118498031.pdfIn PDF document text
    • http://boras-sjuharad.boj.se/uploads/userfiles/files/74349134363.pdfIn PDF document text
    • http://thepnguyentran.com/media/ftp/file/26517702022.pdfIn PDF document text
    • http://www.forexfunction.com/ckeditor/kcfinder/upload/files/39738848012.pdfIn PDF document text
    • https://www.scmribadeave.pt/sgc/Assets/Plugins/CKEditor/kcfinder/Uploads/files/8870216259.pdfIn PDF document text
    • https://cvr.repairbase.net/FCKeditor/editor/filemanager/connectors/php/images/file/72231089258.pdfIn PDF document text
    • https://podar.co.za/XSRYdR1H?utm_term=free+entry+level+nurse+resume+templatePDF link annotation
    • http://akcjonariusz.com/UserFiles/file/bamidinerenaketej.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_off00063fd2.bin)
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn extracted file (font_00_sfnt_off00063fd2.bin)

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00063fd2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x63FD2 19996 bytes
SHA-256: 4506fa60fa11b8d5c0c3912801cb05d6b1a9a711a4ce169e1765e92019053d99
font_01_sfnt_off000673e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x673E1 16560 bytes
SHA-256: 924ad5cb737cfd9a34472b2046831991df4d3950e5f0d7b552a18309318c2ee9
font_02_sfnt_off00068b01.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x68B01 10456 bytes
SHA-256: 59e1adf4dc3b99457a9281f854938119b4c538ae810735374da81a2fb78857b6