Malicious PDF — malware analysis report

Static analysis result for SHA-256 c772a66f4b72a3d5…

MALICIOUS

PDF

63.6 KB Created: 2021-07-26 00:42:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: cf429b90aedd0c0d1edb6546c318a056 SHA-1: aadd693350ebcac844ebc178cd3de67110da6c2e SHA-256: c772a66f4b72a3d501c4f811e3c7a943a58b97571648c7a3e3b353f23fb75077
94 Risk Score

Malware Insights

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

The PDF contains numerous links, many of which point to websites hosted on compromised CMS platforms, suggesting a link farm designed to distribute malicious content or traffic. The ML classifier also flagged this PDF as malicious. The primary attack pattern involves directing users to potentially harmful external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8248

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 http://tavaszitura.eu/userfiles/files/pibufovajokoseku.pdf In PDF document text
    • https://archcosmeticstudio.com.au/wp-content/plugins/super-forms/uploads/php/files/319434f2863e00125700e6c2c067a59c/nawuvuxojirum.pdfIn PDF document text
    • https://www.webhisto.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160d76173bf3c7---rakepedukerobalevowesosu.pdfIn PDF document text
    • http://d4sontario.org/clients/e/ed/ed023a0734c265ca673a92d1d81de675/File/jiwop.pdfIn PDF document text
    • http://www.fattyweng.com.sg/wp-content/plugins/formcraft/file-upload/server/content/files/1609f3253cd579---50173677136.pdfIn PDF document text
    • http://jtour.vn/userfiles/file/lixelusijexu.pdfIn PDF document text
    • http://songhandiban.com/uploadfile/file/2021070518513073499.pdfIn PDF document text
    • http://tingchucontrol.com/Uploadfiles/files/josipemugopotarilit.pdfIn PDF document text
    • http://irmascaritasdejesus.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/16078d3f5e9d7d---98278418838.pdfIn PDF document text
    • http://comp-art.ru/userfiles/file/77057433538.pdfIn PDF document text
    • http://www.primalegal.eu/wp-content/plugins/super-forms/uploads/php/files/6gf1tml5uihgtcdh0608egar61/75874848356.pdfIn PDF document text
    • http://esipro.fr/userfiles/file/voniruzumigefope.pdfIn PDF document text
    • http://nagymester.com/userfiles/file/44974247567.pdfIn PDF document text
    • https://cullinanconstruction.com/wp-content/plugins/super-forms/uploads/php/files/gst1nqb94rflnqe7g1rmftuoaq/xitimadogexetimutexo.pdfIn PDF document text
    • http://brothersaluminium.com.np/wp-content/plugins/formcraft/file-upload/server/content/files/1608f7e36d7d92---kufukib.pdfIn PDF document text
    • http://schule.havonix.com/ckfinder/userfiles/files/xivenovolix.pdfIn PDF document text
    • http://pocatellocampfire.com/wp-content/plugins/super-forms/uploads/php/files/r83de879dlia4p9nmj3htopn0c/10640151192.pdfIn PDF document text
    • https://2greenchicks.com/wp-content/plugins/super-forms/uploads/php/files/fa851dd6593434a18c9bf3dcd635d69e/36358777565.pdfIn PDF document text
    • https://anukulagrotech.com/userfiles/file/39897628761.pdfIn PDF document text
    • https://twr1115.net/files/fckeditor/file/58818602174.pdfIn PDF document text
    • https://www.pal-kont.hu/wp-content/plugins/super-forms/uploads/php/files/94fdef722cec0bf429b58832cca20759/movebezovavu.pdfIn PDF document text
    • http://www.driftime.ee/wp-content/plugins/formcraft/file-upload/server/content/files/1608da0399549d---lavimugepavamukow.pdfIn PDF document text
    • http://haniltm.kr/upfiles/editor/files/11492029163.pdfIn PDF document text
    • http://airsoft1.ro/files/file/66270290607.pdfIn PDF document text
    • http://aucoindeshalles.com/menu/file/77556977864.pdfIn PDF document text
    • http://www.canadiantreasurer.com/wp-content/plugins/formcraft/file-upload/server/content/files/160888c1f33194---sotowufexokulupinofor.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BkSY9tpko7c/uplcv?utm_term=how+to+spawn+helicopter+in+gta+vice+city+storiesPDF link annotation

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