Malicious PDF — malware analysis report

Static analysis result for SHA-256 4e3799a8c7af2e1d…

MALICIOUS

PDF

340.9 KB Created: 2022-03-21 13:30:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-19
MD5: 257949cdf1a1f5fc04bb982b7bb51305 SHA-1: de67308b1296ec0796b36b354adcc6adddf01277 SHA-256: 4e3799a8c7af2e1db35b5e281f941460de1fca84e7420b74ec710a7ff28a512c
174 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.7811

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://yoyep.co.za/XSRYdR1H?utm_term=honey+alonso+estilos+de+aprendizaje+cuestionario PDF link annotation
    • http://adanateknikservis.web.tr/wp-content/plugins/formcraft/file-upload/server/content/files/161fc9d535df04---fifusifeletusuzenaxe.pdfIn PDF document text
    • https://plastr.cz/files/files/95153131670.pdfIn PDF document text
    • http://fine-cottage.ru/userfiles/file/jarowiva.pdfIn PDF document text
    • http://backkwang.com/userData/board/file/29620341196.pdfIn PDF document text
    • http://bonfiremadigan.com/uploads/fckeditor/file/kuwixuzusesomabuv.pdfIn PDF document text
    • http://ulleungroadtour.com/FileData/ckfinder/files/20220225_36702D3F41D79642.pdfIn PDF document text
    • http://becucci.it/userfiles/files/nidadugudofu.pdfIn PDF document text
    • https://fda.weblineinfosoft.com/UserFiles/files/46994947262.pdfIn PDF document text
    • http://lixupeng.com/uploads/files/56238232030.pdfIn PDF document text
    • http://www.alcera.ca/userfiles/file/gamep.pdfIn PDF document text
    • http://alkanboya.com/files/file///gasaru.pdfIn PDF document text
    • http://doicoffee.co.jp/js/kcfinder/upload/files/34614930720.pdfIn PDF document text
    • https://marthomaktrplrdiocese.org/ckfinder/userfiles/files/51867106110.pdfIn PDF document text
    • https://borgopitti.it/userfiles/file/gerutumiwofasa.pdfIn PDF document text
    • https://tasivn.com/upload/ck/files/talezezutarizuzoxaruxupub.pdfIn PDF document text
    • https://www.sevgiliyevideo.net/wp-content/plugins/formcraft/file-upload/server/content/files/162076745f1c32---remufugumofodixuponi.pdfIn PDF document text
    • http://immat.org.tr/kcfinder/upload/files/80926501707.pdfIn PDF document text
    • https://petribax.nl/userfiles/file/13767702040.pdfIn PDF document text
    • https://www.gs-gleichmann.de/wp-content/plugins/formcraft/file-upload/server/content/files/16238461a6160a---lulobarisigudiriz.pdfIn PDF document text
    • http://myslizdrave.com/soubory/64083865753.pdfIn PDF document text
    • http://shepardinteriordesign.com/rw/upload/file/gekidig.pdfIn PDF document text
    • https://hyundainhapkhau.vn/upload/files/67310070902.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 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_off0004e23c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4E23C 10900 bytes
SHA-256: 6240a1b7f25b74e107b4181b30da912665471127a5ecce425d8a6cac08ccc1da
font_01_sfnt_off0004fb94.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4FB94 19468 bytes
SHA-256: 0c2172de2271a73a5ca770e667830513059418c1092dd2a6fc0912c9078501b4
font_02_sfnt_off00052d17.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x52D17 16560 bytes
SHA-256: 924ad5cb737cfd9a34472b2046831991df4d3950e5f0d7b552a18309318c2ee9