Malicious PDF — malware analysis report

Static analysis result for SHA-256 191b810d447ee639…

MALICIOUS

PDF

93.6 KB Created: 2021-08-31 08:04:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-22
MD5: 6ed4b3d730e1baef583b43c6093a63b3 SHA-1: affb3cda975545323705f6392821dad0f9d49e3f SHA-256: 191b810d447ee6396b4d53e7d79e3de553ff70dede4e43d3d6b4eb1079bf6a57
156 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. 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 http://aliceinformaticasrl.com/user/pages/molenetezijol.pdf In PDF document text
    • http://zovsh.com/Uploadfiles/files/61616382707.pdfIn PDF document text
    • http://merklink.nl/site/data/ws/files/14203567244.pdfIn PDF document text
    • http://pinzimoniofiumicino.eu/userfiles/files/povolikefegekabelof.pdfIn PDF document text
    • http://eastcoastbiker.de/sites/default/files/file/92539874692.pdfIn PDF document text
    • http://makaroma.fr/upload/file/wupix.pdfIn PDF document text
    • http://thriftstorewebsites.com/flash/thriftstorewebsites.com/file/kuramovobif.pdfIn PDF document text
    • http://africansafaris-spain.com/FCKeditor/editor/filemanager/connectors/php/connector.php?Command=FileUpload&Type=File&CurrentFolder=%2Ffile/ritivalumotazibidaninewaf.pdfIn PDF document text
    • http://c2r-auto.com/uploadfiles/file/2021053016473673499.pdfIn PDF document text
    • https://nibrasimansch.com/userfiles/files/92503036538.pdfIn PDF document text
    • http://www.fotografoeventimilano.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f004c26d4bc---6915268493.pdfIn PDF document text
    • http://xn--80aaaaaikdebj9ccf1ayja1b5a3q.xn--p1ai/ckfinder/userfiles/files/dokin.pdfIn PDF document text
    • http://mazraeir.com/images/upload/files/silonezijotefikemonugopil.pdfIn PDF document text
    • http://drvision.org/wp-content/plugins/formcraft/file-upload/server/content/files/160965656547d7---17981860765.pdfIn PDF document text
    • https://bimetoor.com/basefile/bimetoorir/files/12298133749.pdfIn PDF document text
    • https://evergreencans.com/userfiles/file/lowuvijogemij.pdfIn PDF document text
    • https://habibitours.org/ckfinder/userfiles/files/sisejasuduwuroxasufesul.pdfIn PDF document text
    • https://robert-zauer.cz/userfiles/file/93884855871.pdfIn PDF document text
    • http://www.anjhimayath.com/upload/file/36297373854.pdfIn PDF document text
    • http://asesorialuishervas.com/wp-content/plugins/formcraft/file-upload/server/content/files/160780918310a6---gekikogepiwam.pdfIn PDF document text
    • http://longarmacademy.net/fckeditor/userfiles/file/78597157266.pdfIn PDF document text
    • http://extreamtuning.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16070d0641285d---davek.pdfIn PDF document text
    • http://parzenica-bialka.pl/userfiles/files/73423790041.pdfIn PDF document text
    • https://mudateconmigo.cl/wp-content/plugins/super-forms/uploads/php/files/bc895abcb98a86d8be113fd6e6602690/57566626494.pdfIn PDF document text
    • http://discarga.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608cac42a9972---27579428036.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/S30rS-6n6vg/uplcv?utm_term=infinite+warfare+zombies+pack+a+punchPDF 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_off00010848.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10848 17828 bytes
SHA-256: 684c0f99f76dcbe9088622618103435ec8dea10d82df01f18bbfeca918bf8463
font_01_sfnt_off0001366f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1366F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00014e86.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14E86 11128 bytes
SHA-256: 19a41a9addd0067728b298639469cdfe833d650e99542c6f0f324dc27f2e8b6d