Malicious PDF — malware analysis report

Static analysis result for SHA-256 91629b5ca773cc0f…

MALICIOUS

PDF

79.0 KB Created: 2021-07-05 17:02:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: fe499f2645ce4514a11e27a2bb7f5675 SHA-1: e962754396db8ef7adf70b05f74b71674973eb5c SHA-256: 91629b5ca773cc0f8b22814c22da232b75ee2a087fae2a9a3458555fb8c1c839
94 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was identified as malicious by an ML classifier. It contains numerous links pointing to compromised WordPress sites and disposable hosting, suggesting it functions as a link farm to distribute malicious content or phish users. The presence of embedded URLs and the nature of the links indicate an attempt to redirect users to potentially harmful external resources.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7437

Heuristics 4

  • 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
  • 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://smidgel.ru/uplcv?utm_term=pmp+processes+and+knowledge+areas PDF link annotation
    • https://apparel.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/47475e4ea3eee686cb1d71c0b6a4e97b/napufujofewulud.pdfIn PDF document text
    • https://www.femregenx.co.za/wp-content/plugins/super-forms/uploads/php/files/5htoblv0h1ntbg6243b2l57865/81908412981.pdfIn PDF document text
    • http://mountcalvary76.com/clients/9/90/9062e1c9f2360b2cedac6e2854879500/File/72592194759.pdfIn PDF document text
    • https://sg-design.top/wp-content/plugins/super-forms/uploads/php/files/30a2cc94887aceba795289677c0ab522/72707664945.pdfIn PDF document text
    • https://www.drserapkagan.com/wp-content/plugins/super-forms/uploads/php/files/5f24l6ms1qu3r4puuaqdeah1p9/gepajewaj.pdfIn PDF document text
    • https://www.booster-p.com/wp-content/plugins/formcraft/file-upload/server/content/files/16073ea6bce55b---gajiburovimokoker.pdfIn PDF document text
    • http://www.hcibatiment.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160bd6c995736b---mewunubumagibabofuluf.pdfIn PDF document text
    • https://www.hdcorp.com.br/wp-content/plugins/super-forms/uploads/php/files/vs7o6n8of2j4eqn9o2ffbeb4e1/73804589792.pdfIn PDF document text
    • https://bbpartner.cz/userfiles/file/59083219443.pdfIn PDF document text
    • https://www.booster-p.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a4b3a3511d4---20977807520.pdfIn PDF document text
    • http://seoulsquare.com/userfiles/file/23616216076.pdfIn PDF document text
    • http://axwelindia.com/uploads/95702303621.pdfIn PDF document text
    • http://www.garriagricola.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cb0a6ed78f---famodevunuzexuxijexid.pdfIn PDF document text
    • https://hacunamatata.ru/wp-content/plugins/super-forms/uploads/php/files/fb03e0bcb88a79005298e8f9f9f2a0d9/napev.pdfIn PDF document text
    • https://dalnoboy.com/data/filestorage/upload/files/kexunoguseka.pdfIn PDF document text
    • https://www.hdcorp.com.br/wp-content/plugins/super-forms/uploads/php/files/sbjlijk61bfk2nsmtamum1omke/91788980853.pdfIn PDF document text
    • https://chaplains-camps.org/upload_picture/file/92422368852.pdfIn PDF document text
    • https://feng-shuiworld.com/userfiles/file/31128335533.pdfIn PDF document text
    • http://www.jcca.co.in/wp-content/plugins/formcraft/file-upload/server/content/files/1608f1d31434aa---95302411051.pdfIn PDF document text
    • https://naseeha.org/wp-content/plugins/super-forms/uploads/php/files/f9cc35adab27d094f1aa3f3b5f258980/58461495362.pdfIn PDF document text
    • https://lacaune.hu/userfiles/file/12833064133.pdfIn PDF document text

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