Malicious PDF — malware analysis report

Static analysis result for SHA-256 3dd552d862b8af43…

MALICIOUS

PDF

77.7 KB Created: 2021-10-17 20:35:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-26
MD5: afbb4117b197791c2e2960857bd4f356 SHA-1: 8093400e6e56c53ebc6a101f22b3c64828856dae SHA-256: 3dd552d862b8af43a1fd68c12cab9e7f328c5248203e89b80f94461ef11ce0e4
156 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

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://maudchristan.nl/ckfinder/userfiles/files/7649499172.pdf In PDF document text
    • http://greenhere.cn/upload/ckimg/files/202109070509401076.pdfIn PDF document text
    • https://erdenetpost.mn/userfiles/files/wibelerusekap.pdfIn PDF document text
    • https://militarynetwork.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1614e0b5f91ca8---vuvabiped.pdfIn PDF document text
    • https://villanakarin.com/userfiles/files/94905298886.pdfIn PDF document text
    • https://www.havanasalsa-dance-tours.com/wp-content/plugins/super-forms/uploads/php/files/0f7d0b184185e425ac4475a91dfb83e0/welirojugaririxigix.pdfIn PDF document text
    • https://nicklason.se/ckfinder/userfiles/files/fabasir.pdfIn PDF document text
    • http://gorod-r.com/userfiles/file/14984269252.pdfIn PDF document text
    • https://www.gml.de/wp-content/plugins/formcraft/file-upload/server/content/files/1616246b2c2083---xujemerivujoj.pdfIn PDF document text
    • http://ewtch.com/upload/files/latelomofurizesivebilin.pdfIn PDF document text
    • http://studio70.eu/userfiles/files/23589917874.pdfIn PDF document text
    • http://madonnina.info/userfiles/files/fagakunekanuxotosawodanu.pdfIn PDF document text
    • http://www.kreasoft.mx/wp-content/plugins/formcraft/file-upload/server/content/files/16164f7880cfea---30534180640.pdfIn PDF document text
    • http://gerastar.com/userfiles/file/xizidomubedoniditu.pdfIn PDF document text
    • http://aggengr.com/uploads/CMS/file/13551613853.pdfIn PDF document text
    • https://megacook.pt/site/upload/file/tebovigabizovaxolagor.pdfIn PDF document text
    • http://santehnika34.ru/images/file/vefakiwiwutigu.pdfIn PDF document text
    • http://www.otevrenysklep.cz/ckfinder/userfiles/files/65488930997.pdfIn PDF document text
    • http://averon.ca/wp-content/plugins/formcraft/file-upload/server/content/files/161471a68761b5---kejul.pdfIn PDF document text
    • https://democv.associasuite.com/imagenes/contenidos/files/tatopeliru.pdfIn PDF document text
    • http://madonnina.info/userfiles/files/zawurejijiv.pdfIn PDF document text
    • http://parfumerieindex.nl/images/uploads/bepewuwekavutewivivotug.pdfIn PDF document text
    • http://www.oomewatersport.nl/upload/files/88679956065.pdfIn PDF document text
    • http://feedproxy.google.com/~r/MbOu/~3/1hHberoKktI/uplcv?utm_term=monster+hunter+rise+save+editorPDF 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_off0000c673.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC673 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000de8a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE8A 10456 bytes
SHA-256: d95a64b787221fc825c8480a1afd0d663712ed5cd89f98579dc20ffff5ef9bcc
font_02_sfnt_off0000f647.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF647 19716 bytes
SHA-256: e98c1d694290156b1db4591ae2f7a2f3231a6adabeb0a1765d3235726f33dc56