Malicious PDF — malware analysis report

Static analysis result for SHA-256 6568eb975041aca0…

MALICIOUS

PDF

93.6 KB Created: 2021-06-29 11:46:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: 64dc1a3f38ae7639f8830818519ecc91 SHA-1: 078a0bd360d9ef0e2b4cadb87fb9616f1dcf4515 SHA-256: 6568eb975041aca0363c02c7a5165d3b880cc20ac3a7b675a8901656705cdaf7
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample is identified as a malicious PDF by multiple heuristics and a machine learning classifier. It functions as a link farm, directing users to numerous external websites, many of which are hosted on compromised WordPress installations. The embedded URLs suggest a phishing or credential harvesting campaign, leveraging disposable hosting and potentially disguised content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9806

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://oniceh.ru/uplcv?utm_term=most+comfortable+humidity+for+humans PDF link annotation
    • http://ziepniekkalns.lv/wp-content/plugins/formcraft/file-upload/server/content/files/160724a94482ca---11300134156.pdfIn PDF document text
    • https://outsourcedbackoffice.co.uk/wp-content/plugins/super-forms/uploads/php/files/629770bde7da864b41c587518806ad2d/95854167367.pdfIn PDF document text
    • https://photographerin.agency/wp-content/plugins/super-forms/uploads/php/files/or6ljhsvino8soi3s1668llv30/48331717673.pdfIn PDF document text
    • http://indago-rovigo.it/userfiles/files/wewejawudu.pdfIn PDF document text
    • https://inchiriereelicopterromania.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16083d888ca2d4---62433103270.pdfIn PDF document text
    • http://stinpo.com/ckfinder/userfiles/files/vedipud.pdfIn PDF document text
    • https://egf.tw/test2/images/file/sodidakitisejovoxuxomilaj.pdfIn PDF document text
    • https://binhruamuinanobac.com/wp-content/plugins/super-forms/uploads/php/files/dbc4gesva49pgtela0sldmtfq5/vajozakididodatiloxizol.pdfIn PDF document text
    • http://debandhelder.nl/ckfinder/userfiles/files/67959898557.pdfIn PDF document text
    • http://tunglamgarden.com/images/fck/file/momimosagejovitida.pdfIn PDF document text
    • https://www.reliancecareuk.com/wp-content/plugins/super-forms/uploads/php/files/02544bb94017dfafa6e5e7988aad4e61/jopipafuf.pdfIn PDF document text
    • https://fertilizergranulatorprice.com/d/files/4360261999.pdfIn PDF document text
    • http://www.olympussverige.se/wp-content/plugins/super-forms/uploads/php/files/c7n4mi5m5jkbkug54m6gmqkjb8/vonemasitakenijotekefiwi.pdfIn PDF document text
    • https://brianhigbielaw.com/UserFiles/file/69268299671.pdfIn PDF document text
    • http://usateatop.com/_upload/files/6352224123.pdfIn PDF document text
    • https://luxurytravel-show.com/wp-content/plugins/super-forms/uploads/php/files/f7123f3ca367cb86dcf6d40245a23136/xosawovusubeko.pdfIn PDF document text
    • https://obermeyer-modemarkt.de/upload/file/kuwufunewexobere.pdfIn PDF document text
    • https://laneopx.com/wp-content/plugins/formcraft/file-upload/server/content/files/160844dd848829---12184895384.pdfIn PDF document text
    • https://zlatartopalovic.rs//files/43949938589.pdfIn PDF document text
    • http://gernano.eu/gfx/userfiles/files/48801900487.pdfIn PDF document text
    • http://www.justgiveahand.org/wp-content/plugins/formcraft/file-upload/server/content/files/16083dcf2928bc---vivowaj.pdfIn PDF document text
    • https://www.oneirishrover.com/wp-content/plugins/super-forms/uploads/php/files/ddb627ffaa404c8c4cadf2c8b572335e/66882709050.pdfIn PDF document text
    • https://www.mercato.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1609844f56b1b2---numodejilasekevezup.pdfIn PDF document text
    • https://arizonalightingsales.com/wp-content/plugins/super-forms/uploads/php/files/ed8dc300fd9eebfe9e6b913af1a3f54c/16619140043.pdfIn PDF document text
    • https://roweryelectra.eu/app/webroot/uploads/file/16216144337516.pdfIn PDF document text
    • http://poltinik.ru/userfiles/file/dosurumo.pdfIn PDF document text
    • https://an-professional.ru/img/files/file/wepomemefegedomerusavov.pdfIn PDF document text
    • 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_off00010a89.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A89 17060 bytes
SHA-256: 5cdbf2ee48c5aef2cdd0c303426f9296ce1cbb70c918ce1319f2a81b2b88f4fd
font_01_sfnt_off0001370f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1370F 11088 bytes
SHA-256: 06f926b65e4ecfaf388857c59f8d07cd0ccd967f18d719f6ce8269ea2ed60b0f
font_02_sfnt_off000150be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x150BE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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