Malicious PDF — malware analysis report

Static analysis result for SHA-256 c10682d574819b6b…

MALICIOUS

PDF

100.6 KB Created: 2021-06-28 03:22:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: d4cee9764eb0a8953004b4974b92b026 SHA-1: 11570814eb88b2e536aa3374f55c4c1a2005dc49 SHA-256: c10682d574819b6b3c5c856e295a16089dfca2c61f6fa24831d98c98696f8dbc
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The file was identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous links, many pointing to compromised CMS upload directories or disposable hosting, suggesting a link farm designed to redirect users to malicious sites. The presence of these links and the overall structure strongly indicate a phishing or credential harvesting attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9923

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://vitalenzyme.com/uploads/fckupload/file/vogenodujodidud.pdf In PDF document text
    • http://salonlomi.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1609ee8c056ada---43936103411.pdfIn PDF document text
    • https://siphouse96.com/wp-content/plugins/super-forms/uploads/php/files/2161cdb8a0fbdae17c13c9c18dc8defc/kajegapubugojefa.pdfIn PDF document text
    • http://kyanite.tv/userfiles/file/xajivux.pdfIn PDF document text
    • http://www.sbawerribee.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1607ed16434081---galaxudajubekeb.pdfIn PDF document text
    • https://kamber.dk/wp-content/plugins/super-forms/uploads/php/files/ea54592ba9d45c27c5c9a8576f7a79bd/mitebu.pdfIn PDF document text
    • https://www.bountyvacation.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bc37d06185e---76649314544.pdfIn PDF document text
    • https://asaptransfers.co.uk/wp-content/plugins/super-forms/uploads/php/files/ottciuv66e8fkla267vfjs0s81/88805684514.pdfIn PDF document text
    • http://dentherapia.hu/files/file/32278619794.pdfIn PDF document text
    • http://fruitvita.com/files/files/37939390772.pdfIn PDF document text
    • https://alignerco.com/wp-content/plugins/super-forms/uploads/php/files/76fbc9a159603d0e8a7ed0e832863fd6/jomozobasixezesiki.pdfIn PDF document text
    • https://diversified-nj.com/wp-content/plugins/super-forms/uploads/php/files/db23fb3a035d1dcf1b8defff02933f56/bivoni.pdfIn PDF document text
    • https://alenakovalchuk.ru/wp-content/plugins/super-forms/uploads/php/files/76ed9a1cb32f44bee1737fdada48f9f7/81302927044.pdfIn PDF document text
    • http://fullcolorspandoeken.nl/userfiles/file/fagixu.pdfIn PDF document text
    • http://mgocsm.in/userfiles/file/vafobiru.pdfIn PDF document text
    • https://www.arc-welding.co.uk/wp-content/plugins/super-forms/uploads/php/files/1ivia60ee3qm5shphpq8u6lqk3/jewufuxuwulozexiku.pdfIn PDF document text
    • http://bestforfishing.com/wp-content/plugins/super-forms/uploads/php/files/31e214ab51cf0e5e3b991c6ece7420bc/nivejatez.pdfIn PDF document text
    • http://ednak.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d25ff200f3f---wavijivawedozinu.pdfIn PDF document text
    • http://itssilvertime.com/clients/2/24/24efe347a73a8ce028152bf895bc11a7/File/xitivokixajalazatokupujix.pdfIn PDF document text
    • https://www.hotel-palladium.gr/wp-content/plugins/super-forms/uploads/php/files/jahl3j12hcsrsfu6lglfclm8vr/ruvoxugirurarijalosetetix.pdfIn PDF document text
    • http://ekotop.eu/userfiles/file/zuvukibumuromuned.pdfIn PDF document text
    • http://firanywiktoria.pl/uploads/editor/file/palabapatutita.pdfIn PDF document text
    • http://chinazzjx.com/d/files/kovitiwos.pdfIn PDF document text
    • https://schreinerheusi.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a61a79aebf3---pemisuj.pdfIn PDF document text
    • https://sheenabusesandcoaches.com/userfiles/file/zevarajirojasadumil.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/YTWXjIUwRh0/uplcv?utm_term=moth+pollinated+flowersPDF 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_off0001250a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1250A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00013d1c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13D1C 18432 bytes
SHA-256: 4e2e08c131f964a7d61ec3722d56c5cc59e7d2d6aab6f8e149e212969c9b7237
font_02_sfnt_off00016c8b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16C8B 10672 bytes
SHA-256: 6ad151cc8964c14022178cf9154258f2235628cf17ebb4aa5a8e6ac832675183