Malicious PDF — malware analysis report

Static analysis result for SHA-256 4250d665bf3a15b4…

MALICIOUS

PDF

70.8 KB Created: 2021-09-18 06:00:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-15
MD5: db113724e767555bfdcce709ad5540c5 SHA-1: 29e0844a05db0c1e015f85865ebe02af6b66991c SHA-256: 4250d665bf3a15b48c106883371a2b8e95008d4e37dbeef783e25fc168982b48
156 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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://nurugelexport.com/ckfinder/userfiles/files/44847179048.pdf In PDF document text
    • https://inmaabiladi.com/userfiles/files/69402492603.pdfIn PDF document text
    • http://thegioimaychaybo.com/app/webroot/uploads/files/68941089730.pdfIn PDF document text
    • https://www.lindopoint.it/wp-content/plugins/super-forms/uploads/php/files/341b167db027a5380b8bfc10e5cf3385/55621585915.pdfIn PDF document text
    • http://www.wallisandemmanuel.com/wp-content/plugins/formcraft/file-upload/server/content/files/16136c21cdff28---58954841210.pdfIn PDF document text
    • https://pmapmc.com/userfiles/image/files/tozavid.pdfIn PDF document text
    • http://romanasulcikova.cz/userfiles/wemimukopupenigi.pdfIn PDF document text
    • http://tindangnhadat.vn/upload/files/77307099074.pdfIn PDF document text
    • https://gamma-electronics-eg.com/userfiles/files/nepimob.pdfIn PDF document text
    • http://pokrowce-ochronne.pl/Upload/file/2317177348.pdfIn PDF document text
    • http://greathorserider.com/ckfinder/userfiles/files/91715840294.pdfIn PDF document text
    • https://artistprasanna.com/userfiles/file/jirupe.pdfIn PDF document text
    • https://www.energetisch-therapeut-estie.nl/wp-content/plugins/formcraft/file-upload/server/content/files/161424d61e5139---fitusenivikupuvabura.pdfIn PDF document text
    • http://ne-moloko.ee/wp-content/plugins/super-forms/uploads/php/files/6d0ceb37226db0b13af385e77e289753/24620160459.pdfIn PDF document text
    • https://onsale.social-push.cc/data/fckeditor/files/69560407166.pdfIn PDF document text
    • http://aasghsflqsae.handylover.com/upload/files/37520191092.pdfIn PDF document text
    • http://na-bytecek.cz/UserFiles/File/nuvamabakomifate.pdfIn PDF document text
    • https://blagoustroystvo24.ru/ckfinder/userfiles/files/jakez.pdfIn PDF document text
    • http://hndgyl.com/v15/Upload/file/2021914110288975.pdfIn PDF document text
    • https://pensiunea-escape.ro/ckfinder/userfiles/files/riginulonazakidasalarixet.pdfIn PDF document text
    • https://www.sharpeningfactory.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613b66b102cfb---xosataxefofegetopufikipe.pdfIn PDF document text
    • https://condicionamentofisico.com/arquivos/file/vidiveresetoximorabove.pdfIn PDF document text
    • http://bestapp4u.com/admin/uploadedfiles/file/tidonidurusanafisakoxele.pdfIn PDF document text
    • http://biancoacolori.it/userfiles/files/71928117939.pdfIn PDF document text
    • http://baschin-heizung.com/meineBilderAlbertGrundschule/file/sebazovixi.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/S30rS-6n6vg/uplcv?utm_term=big+brother+game+download+for+androidPDF 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_off0000b59f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB59F 10912 bytes
SHA-256: e0d75f7ba2b136eb9303b35e81704bd21eb56b929a8a8100600be074e825ebe2
font_01_sfnt_off0000ce87.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE87 15576 bytes
SHA-256: f406ad4f0833fc5c98ddcac2cc9a3247535853d409771058d6b13136e7055c64
font_02_sfnt_off0000f5a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5A0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1