Malicious PDF — malware analysis report

Static analysis result for SHA-256 7822c50b7270f135…

MALICIOUS

PDF

379.1 KB Created: 2021-12-24 21:45:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-16
MD5: 39ecb731f7001c7525879b58306950ae SHA-1: 562ed48e37dd7067f842b259fb14059d550b1b8d SHA-256: 7822c50b7270f135f80a4dbfb2d42f89faa3aff93546f5f9ba01eacc30b7926f
166 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.8080

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://innotek.vn/uploads/news_file/sexeridufatoj.pdf In PDF document text
    • http://myshopgroup.com/userfiles/files/86228527009.pdfIn PDF document text
    • https://tanhaithanhvalves.com/quangcao/admin/file/kifadivo.pdfIn PDF document text
    • https://dadesigning.com/daduserfiles/files/pidupoxaliwibebu.pdfIn PDF document text
    • http://kotolantopeni.cz/file/80171188170.pdfIn PDF document text
    • http://esteticka-stomatologie.cz/files/content/file/74094041943.pdfIn PDF document text
    • http://wakingbeauty.com/wp-content/plugins/formcraft/file-upload/server/content/files/1615ce50fb9b45---87418906748.pdfIn PDF document text
    • https://dortmundpools.com/contents/files/50343738202.pdfIn PDF document text
    • https://www.pfgpartners.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16183ba89dfa06---suzotugadidige.pdfIn PDF document text
    • https://www.andimoda.com/wp-content/plugins/super-forms/uploads/php/files/9e317baa0d054e53e6c51f0ef0336aaf/83426298169.pdfIn PDF document text
    • https://msiutilities.net/documents/2547516370.pdfIn PDF document text
    • http://jagdrevier.hu/upload/images/file/modafiduxeturexabonowa.pdfIn PDF document text
    • http://sts-logistika.ru/wp-content/plugins/super-forms/uploads/php/files/d7e1a28d994e6d7ee06329940291120d/wuziwerefamokasut.pdfIn PDF document text
    • http://federicozucchettiarchitetto.eu/userfiles/files/74801520983.pdfIn PDF document text
    • http://kachelofen-prommegger.at/63583421519.pdfIn PDF document text
    • https://www.poeles-granules-vasconha.fr/ckfinder/userfiles/files/97422674727.pdfIn PDF document text
    • http://www.tsahimmongol.com/uploads/images/files/76911104668.pdfIn PDF document text
    • https://siam-royal-view.ru/data/files/sokipi.pdfIn PDF document text
    • http://youzedu.com/ckimages/files/20211011055719786013.pdfIn PDF document text
    • http://www.programasaudetotal.com/arquivos/file/3912594795.pdfIn PDF document text
    • https://pyhm.ca/wp-content/plugins/super-forms/uploads/php/files/0fklh2on6q31thlccq44qoub3a/73601294734.pdfIn PDF document text
    • http://jts-electrical.co.uk/ckfinder/userfiles/files/busokuwa.pdfIn PDF document text
    • http://ekvatorbl.com/userfiles/file/redugoxivoxixepigowo.pdfIn PDF document text
    • http://pereplanirovkaoblast.ru/pict/file/64440318710.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Gsjc/~3/RhDyTiV0TgQ/uplcv?utm_term=yeti+warranty+claim+formPDF 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 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_off0005801e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5801E 16416 bytes
SHA-256: cfa2c3fbce80cc5607e01af033b793d17c57c214fb1d96e845eedea48cccd336
font_01_sfnt_off000596c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x596C2 10512 bytes
SHA-256: 42257408eb0669bdcd4c06307f00c23423657d3054fdaaf449635ff2ec18870b
font_02_sfnt_off0005aeb8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5AEB8 18304 bytes
SHA-256: 8e0c7500662994240096046bf490d6a0975abeb49812ec111620f53177305edb