Malicious PDF — malware analysis report

Static analysis result for SHA-256 4257e895abb49753…

MALICIOUS

PDF

99.8 KB Created: 2021-07-31 23:33:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-15
MD5: b1945ae9690f8ef6005498a599e0851f SHA-1: 4ba03846dda334e6b91cf4f1a9fc96119eb9db43 SHA-256: 4257e895abb497531efdfe5d71fd481eac417dd905c91732e41602887478e961
156 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9979

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
  • 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 https://genesisbehaviorcenter.com/wp-content/plugins/super-forms/uploads/php/files/e0b086f5f8e0adccf3dc490a7d235463/91247135171.pdf In PDF document text
    • http://www.cheapmotorcycleinsurancepa.com/wp-content/plugins/super-forms/uploads/php/files/7lcdlbukdatigbr2pjgre4uac1/buxalojelereripowagi.pdfIn PDF document text
    • http://commune-bourre.com/userfiles/file/jijapunuxe.pdfIn PDF document text
    • https://bechtoldpaving.com/wp-content/plugins/super-forms/uploads/php/files/c7e3778f8592733585532540919a3b04/webuwup.pdfIn PDF document text
    • http://heilpraxis-pankow.de/wp-content/plugins/formcraft/file-upload/server/content/files/160ab6d3b46140---fuzebaxu.pdfIn PDF document text
    • https://domilot.com/uploader/files/kexoraporizepom.pdfIn PDF document text
    • http://www.lauricedale.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160b29e01d7d7e---34961230915.pdfIn PDF document text
    • https://amartzon.store/wp-content/plugins/super-forms/uploads/php/files/2906458615a99900fce005cad845e12f/juzedizunap.pdfIn PDF document text
    • http://eltonltd.ru/sites/default/files/uploads/jilosedegax.pdfIn PDF document text
    • https://badoza.net/userfiles/file/fuxizozazuxaba.pdfIn PDF document text
    • http://fashioncenterpoint.com/wp-content/plugins/super-forms/uploads/php/files/fe2259d606b9ed515d0d0c64b0ac7c3a/gazofabigofirosesobi.pdfIn PDF document text
    • https://sieuviet.net/webroot/img/files/11084796460.pdfIn PDF document text
    • https://dp-engineers.com/admin/userfiles/file/6765017209.pdfIn PDF document text
    • http://www.kissdocs.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160c55d8501437---bujovowodikemipunedovat.pdfIn PDF document text
    • http://2ds-creations.fr/userfiles/file/45323115379.pdfIn PDF document text
    • http://verkoop-je-wagen.be/wp-content/plugins/formcraft/file-upload/server/content/files/1606d814464953---90927212665.pdfIn PDF document text
    • http://www.casasemio.com.br/ckfinder/userfiles/files/bedemofoliza.pdfIn PDF document text
    • http://somersetcountybar.org/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/wasawigitojufufise.pdfIn PDF document text
    • https://comodee.com/wp-content/plugins/formcraft/file-upload/server/content/files/160dc88f88afa8---dipodutotubepifujuzamik.pdfIn PDF document text
    • http://ljhalls.com/wp-content/plugins/super-forms/uploads/php/files/30ca7be9a73d145e7bb6ea4c60096a63/75007958916.pdfIn PDF document text
    • https://hoatuoi360.vn/uploads/files/dewupimopezuvorolevux.pdfIn PDF document text
    • http://modern-pro.ru/files/file/61748668563.pdfIn PDF document text
    • http://milcontabil.com.br/wp-content/plugins/super-forms/uploads/php/files/0k5tup58fv5u7i6k0e0ovlnjq5/98272028182.pdfIn PDF document text
    • http://travelport.pl/userfiles//file/78019941311.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BkSY9tpko7c/uplcv?utm_term=camp+green+lake+texas+factsPDF 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_off0001238e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1238E 10836 bytes
SHA-256: e73fb5d613e631d2d495ef13bf8abe449449d65daec5bef6133e080bdcc2ffb1
font_01_sfnt_off00013c9f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13C9F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000154b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x154B1 16840 bytes
SHA-256: 13d990a088fd44c7121ce725687cb7b2c95effacc8e51d4eaf7f5fb00b9a2406