Malicious PDF — malware analysis report

Static analysis result for SHA-256 a8b16272805d1a76…

MALICIOUS

PDF

475.4 KB Created: 2022-03-02 13:05:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-04-06
MD5: 0a34a52751f87a97c57ac9479e13c2fa SHA-1: 77ef51d3f59ceec6c7700c8f9313ba20593a803f SHA-256: a8b16272805d1a76fe9c58957e3dafcbddc7b9b78966f48c995026b387991386
136 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.8252

Heuristics 5

  • 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.
  • 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://loheb.co.za/XSRYdR1H?utm_term=constitutional+convention+worksheet PDF link annotation
    • https://lazdynumokykla.lt/userfiles/file/nibapevadix.pdfIn PDF document text
    • http://gewald.ru/content/Files/sarerazefupewi.pdfIn PDF document text
    • http://klimafertotlenites.hu/kcfinder/upload/files/gefali.pdfIn PDF document text
    • http://xn--brneneskontor-landsforening-b0c.dk/userfiles/file/poxuxumomosufod.pdfIn PDF document text
    • https://onecre.com/images/content/files/8287107330.pdfIn PDF document text
    • http://www.aippc.net/kcfinder/upload/files/91347164950.pdfIn PDF document text
    • http://placidlakes.com/larpm/uploads/file/28773303099.pdfIn PDF document text
    • http://mousike.it/img_ins/files/zowupununaboniwajejodif.pdfIn PDF document text
    • http://supair-lux.hu/ckfinder/userfiles/files/jusaburuzebo.pdfIn PDF document text
    • http://beautystyln.jp/uploads_file/files/sijab.pdfIn PDF document text
    • http://afrodiva.communication-pro.fr/public/846/contenu/file/rimiramabijemig.pdfIn PDF document text
    • https://nhaban24h.com.vn/wp-content/plugins/super-forms/uploads/php/files/d92eb6f1p1r97n852mvfntslu2/2209492609.pdfIn PDF document text
    • https://plasticosgyc.co/kcfinder/upload/files/situxibamimesabizikenisa.pdfIn PDF document text
    • https://pikewallis.no/wp-content/plugins/formcraft/file-upload/server/content/files/161f9195e66080---67631773013.pdfIn PDF document text
    • https://st-stephens-church.com/upload/File/4143556182.pdfIn PDF document text
    • http://csc0532.com/userfiles/file/20220216095101_mwm54w.pdfIn PDF document text
    • http://oticonshop.net/ckfinder/userfiles/files/40707818062.pdfIn PDF document text
    • http://somsit.com/ckfinder/userfiles/files/jejut.pdfIn PDF document text
    • http://jainfarms.com/uploads/82658407911.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_off0006fc23.bin)
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn extracted file (font_00_sfnt_off0006fc23.bin)

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0006fc23.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6FC23 19380 bytes
SHA-256: d43bc481722a2e0609750c01a46761d6595f8028f56dcffcc1eee1b8381bd6bb
font_01_sfnt_off00072e33.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x72E33 16560 bytes
SHA-256: 924ad5cb737cfd9a34472b2046831991df4d3950e5f0d7b552a18309318c2ee9
font_02_sfnt_off00074553.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x74553 10704 bytes
SHA-256: 4174019a747f2ba5377c6f33809be8a53a5bc8c51ad550cf82ff581a6e1555b7