Malicious PDF — malware analysis report

Static analysis result for SHA-256 4af8a1bb7e4c5cad…

MALICIOUS

PDF

86.5 KB Created: 2021-08-25 22:08:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-06
MD5: a9120b200ba494274dd2c51df3b7200f SHA-1: befe16db3b50db473a20a5fa0dca32058502c463 SHA-256: 4af8a1bb7e4c5cad6e51e2572a739622e798513fc8702396bc9779e55d721db1
156 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://www.cr-sdc.org/wp-content/plugins/super-forms/uploads/php/files/fceabfa4ee7795a73c3c0b9b6dd77553/45774065371.pdf In PDF document text
    • https://fourseasons.events/wp-content/plugins/super-forms/uploads/php/files/f3f28d8a20b85d6fbf0c70959800e601/34924008840.pdfIn PDF document text
    • http://www.petersmetalstitching.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160c42d9ba6f38---43491841293.pdfIn PDF document text
    • https://bindazzled.com.au/wp-content/plugins/super-forms/uploads/php/files/91aa0c244083702282ca30e9baa2077e/womibepezuxuse.pdfIn PDF document text
    • http://thebellingerfamily.com/clients/0/05/05034faaa501c69409a7459485cba135/File/99958183003.pdfIn PDF document text
    • https://genesisbehaviorcenter.com/wp-content/plugins/super-forms/uploads/php/files/cc451ab79cdb1351db721639ec7481ef/61015111956.pdfIn PDF document text
    • http://pvsystexperts.com/wp-content/plugins/super-forms/uploads/php/files/tp2jb0ekqb27hqfhu8ipsbg417/tugaxiwirewegizagodomonu.pdfIn PDF document text
    • https://alteanetworks.fr/img/file/xutufikusisix.pdfIn PDF document text
    • http://nhasachconggiao.com/luutru/files/50130537402.pdfIn PDF document text
    • http://www.studiolegalefusimorelli.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609c14e4591a5---rosuxejederelewitusizokev.pdfIn PDF document text
    • http://amsaneeraus.fi/userfiles/files/35301600048.pdfIn PDF document text
    • http://www.studiolegalefusimorelli.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608f29161b788---badisok.pdfIn PDF document text
    • https://alismobile.co.uk/wp-content/plugins/super-forms/uploads/php/files/23ac5f95d1cbba9461c85efba36deff6/70692406434.pdfIn PDF document text
    • http://liweisteel.co.th/ckfinder/userfiles/files/zubawobakizopeso.pdfIn PDF document text
    • http://chiangmai-clean.com/user_img/files/dubajikurufobulivo.pdfIn PDF document text
    • http://agataklimowska.pl/userfiles/file/19258088314.pdfIn PDF document text
    • http://happysmilecard.com/uploads/files/xoruvenewojekebo.pdfIn PDF document text
    • http://www.segurosfacility.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/161090dbd9e4e9---lurafeje.pdfIn PDF document text
    • https://directorvincentchow.com/fck_filemanager_upload/file/rezakapitogubekofopukex.pdfIn PDF document text
    • http://mensagemcrista.com.br/ckfinder/userfiles/files/2078321181.pdfIn PDF document text
    • http://qtjdb.com/UploadFile/2021/08/22/file/20210822_055147_141.pdfIn PDF document text
    • http://yves-segers.be/userfiles/files/rofupabatigelarakozem.pdfIn PDF document text
    • https://orangcar.com/app/webroot/upload/files/99526447416.pdfIn PDF document text
    • https://www.ltgpartners.com/wp-content/plugins/super-forms/uploads/php/files/dca5e142b795d92d5809d0c96bce1392/vimazov.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/ngfLrbzwjls/uplcv?utm_term=rudy%27s+dry+cleanersPDF 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_off0000f009.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF009 10348 bytes
SHA-256: 792cc335e5a5cf22dbb3de90a19c406fe18c609309c74715d515a9a6790cd1b0
font_01_sfnt_off00010795.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10795 16592 bytes
SHA-256: 304d1d007c84326c574ae9c605e987dd16e1ecd6bfea5765153a7fe62efb150d
font_02_sfnt_off000132d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x132D3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1