Malicious PDF — malware analysis report

Static analysis result for SHA-256 b044e841f3e5689f…

MALICIOUS

PDF

67.8 KB Created: 2021-07-21 14:11:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 18ed1bfde854e2f982d31fe6a613e94b SHA-1: c939bab855c1f0b970c6205371f404a959b4087a SHA-256: b044e841f3e5689fe535191a4343b9a8b62935ddd8b2c589b489a8822bfe83dc
94 Risk Score

Malware Insights

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

The PDF contains a link farm pointing to numerous distinct hosts, many of which appear to be compromised WordPress sites used for hosting PDF files. The ML classifier also flagged this PDF as malicious. The primary purpose appears to be directing users to external, potentially malicious, content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5615

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://plusbateria.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b956cbbfa72---13659259563.pdf In PDF document text
    • https://msr-hudsonproperties.com/wp-content/plugins/super-forms/uploads/php/files/2284a5479207bbe86615aea435e4b422/xaxijuzowo.pdfIn PDF document text
    • http://www.icodar.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b794012f958---jidanumiwezesagabesit.pdfIn PDF document text
    • https://www.swissfillon.com/wp-content/plugins/super-forms/uploads/php/files/d2955e86f644418b83b9a161e384038e/nixapiwidawuzugube.pdfIn PDF document text
    • https://formapolis.it/wp-content/plugins/super-forms/uploads/php/files/2ef8e2af102f012475d754110000e51e/6515697552.pdfIn PDF document text
    • http://www.urbanwaterways.info/files/nenadip.pdfIn PDF document text
    • http://extracam.es/app/webroot/arxius/file/telukegix.pdfIn PDF document text
    • http://www.canadavisaservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608294a509a7a---watobu.pdfIn PDF document text
    • http://suportti.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608fcac621d4c---tunaseveza.pdfIn PDF document text
    • https://eyestech.in/wp-content/plugins/super-forms/uploads/php/files/5qf7pgmlk65lh9ndb1icffst8q/mivaberuwuzobokuroduguja.pdfIn PDF document text
    • https://bodwellassociates.com/wp-content/plugins/super-forms/uploads/php/files/bd357172174d1c4c318d390f698564b4/lupufelezexisikejanek.pdfIn PDF document text
    • http://mofrantech.com/userfiles/file/ritekezonu.pdfIn PDF document text
    • https://atl-50.com/files/file/37670745871.pdfIn PDF document text
    • http://inse.us/uploads/images//files/45793248526.pdfIn PDF document text
    • https://gmnavarra.es/ckeditor/files/bafotezekopibefujaxexek.pdfIn PDF document text
    • https://www.sir.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160c16b9fe29f9---sodogamoropi.pdfIn PDF document text
    • https://enville.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d4af33ac8d1---ganesel.pdfIn PDF document text
    • http://hondatayho.vn/images/ckeditor/files/nodefazasagebimujogowekop.pdfIn PDF document text
    • http://imreelectric.sk/uploads/file/bukufulebijofoxenexagipi.pdfIn PDF document text
    • https://dedywiredja.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d2438315cf---14103116956.pdfIn PDF document text
    • http://sarahscupcakery.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609831cb2b24b---kozidowop.pdfIn PDF document text
    • http://citywideok.com/clients/75789/File/99362259784.pdfIn PDF document text
    • http://aeskulap24h.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ccbd4837336---92756620604.pdfIn PDF document text
    • http://asu.com.vn/wp-content/plugins/super-forms/uploads/php/files/0cab5he6iu9nac98gjm2ku364j/detupemoviru.pdfIn PDF document text
    • https://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/160bd0809a9e5d---nopabuxusepowivosabiwi.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3CAf4wW3hvY/uplcv?utm_term=hives+on+face+after+showerPDF link annotation

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