Malicious PDF — malware analysis report

Static analysis result for SHA-256 4251cd9fab62240e…

MALICIOUS

PDF

89.9 KB Created: 2021-08-10 07:19:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-15
MD5: 0caaeb5e5538e29a38b5a3e466bb2d1c SHA-1: 93415536f1ae07cc78b2dd79266fed3c34c45225 SHA-256: 4251cd9fab62240eb61eb138dff938d351840d976233ce0e42e356333a544c3c
156 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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 http://uat.ideadunes.com/projects/ideadunes-portfolio-site/wp-content/plugins/formcraft/file-upload/server/content/files/160adb8d646b3e---gusobobod.pdf In PDF document text
    • https://gdr.co.il/wp-content/plugins/super-forms/uploads/php/files/b87c5c5c0f4b11b465829ea3677d9610/29189043107.pdfIn PDF document text
    • http://marinapogon.pl/upload/file/kokikejepewuwagalamegug.pdfIn PDF document text
    • https://yournew.site/wp-content/plugins/super-forms/uploads/php/files/oi36ofqn50pefpkkrmqlh852rl/fawatabora.pdfIn PDF document text
    • http://arcomproltd.com/userfiles/file/fapededu.pdfIn PDF document text
    • http://sochi-riba.ru/ckfinder/userfiles/files/wesozos.pdfIn PDF document text
    • https://www.3dreamchurch.com/wp-content/plugins/super-forms/uploads/php/files/dd9c0b0512a7ae927fcf3980f3b3d459/40547994862.pdfIn PDF document text
    • https://traveletrust.com/basefile/traveletrustcom/files/goxazibikifape.pdfIn PDF document text
    • http://www.vljainandco.com/userfiles/files/xoroditabesiwevixawomire.pdfIn PDF document text
    • http://aeskulap24h.de/wp-content/plugins/formcraft/file-upload/server/content/files/160aa4b14e2634---55861690658.pdfIn PDF document text
    • http://www.reroofingbrisbaneqld.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160d1d5d7c2f90---59575076526.pdfIn PDF document text
    • http://jrpst.pl/userfiles/file/30887533954.pdfIn PDF document text
    • https://aquatrustfina.com/userfiles/file/83175367087.pdfIn PDF document text
    • http://language-coach.pl/uploads/files/muvasixekuledotafeku.pdfIn PDF document text
    • https://bf-pomosch.ru/wp-content/plugins/super-forms/uploads/php/files/kue08fmsa3rjh1l0abfn2ck386/bosukanamabajivil.pdfIn PDF document text
    • http://www.hotel-margherita.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d215989319e---dumafuguxibi.pdfIn PDF document text
    • https://www.onestopnaturalstore.ca/wp-content/plugins/super-forms/uploads/php/files/8vvp0mv9c12g03en8sisirum04/fufejujanidozenopizeti.pdfIn PDF document text
    • https://lakeshoresmilesdentistry.com/wp-content/plugins/super-forms/uploads/php/files/vqf8j01skdihqohckcfqbl7q67/86478955402.pdfIn PDF document text
    • https://najlepsze-w-polsce.pl/uploads/wufozobexovezitujigupovu.pdfIn PDF document text
    • https://nuevocoach.co.uk/wp-content/plugins/super-forms/uploads/php/files/b67b78068de167dc4411c76a3a9a927f/daxamufedijulotamet.pdfIn PDF document text
    • http://m2mus.ca/clients/b/b1/b1ca46fdb12d68e762e4a8b3318caec0/File/45484634323.pdfIn PDF document text
    • https://www.shopveriamici.com/wp-content/plugins/super-forms/uploads/php/files/bs7l04sd4538vp53734kn68p3u/xibugape.pdfIn PDF document text
    • http://exito-opakowania.pl/userfiles/file/zobajaduvajetopa.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BkSY9tpko7c/uplcv?utm_term=force+vs+power+book+pdfPDF 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_off0000fd3e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD3E 17460 bytes
SHA-256: 7bf73cfb0fa05fef16357db614a0154365500ae3918c6b7ffee6df775b83dd5b
font_01_sfnt_off00012a90.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12A90 10472 bytes
SHA-256: f767fc6936cc46849bedbf51c9e4ebcfe18104e6df486e9c3f9352e14c06b7c1
font_02_sfnt_off0001424e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1424E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1