Malicious PDF — malware analysis report

Static analysis result for SHA-256 630b79ccdaed63b5…

MALICIOUS

PDF

56.8 KB Created: 2021-09-01 10:21:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 18f45e8072e4510e1dbcdef0e5d8a3ef SHA-1: 72e6cd189a23a982824e9baa1c0379d30e6c30a3 SHA-256: 630b79ccdaed63b51cde639d5f37ba2cfe7889d63daf580652b77e0e69fee33f
94 Risk Score

Malware Insights

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

The PDF contains a large number of links pointing to various websites, many of which appear to be compromised or hosted on disposable domains. The ML classifier strongly indicated maliciousness, and the link farm structure suggests an attempt to manipulate search engine results or distribute malicious content. No scripts were extracted, and the document body was unreadable.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9794

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://livingcircles.ch/wp-content/plugins/formcraft/file-upload/server/content/files/16086f3177b7d0---vodoxameji.pdf In PDF document text
    • http://hotelstrack.com/bot/ckfinder/uf/files/20116415124.pdfIn PDF document text
    • https://lorenzonimmigrationlaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e0f7c9d4854---zezujiri.pdfIn PDF document text
    • https://autoroman-service.ro/imagini_ws/40263903882.pdfIn PDF document text
    • http://project-lovcen.me/userfiles/file/23266266785.pdfIn PDF document text
    • https://srmresidences.com/images/bulk_images/files/zajanuwa.pdfIn PDF document text
    • https://www.latentoac.com/portal/wp-content/plugins/super-forms/uploads/php/files/al8r1ha5dobjtnvkthjqeoutag/82717935484.pdfIn PDF document text
    • http://stitesattorney.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/pitidadu.pdfIn PDF document text
    • https://www.afoa.org.ar/backend/ckfinder/userfiles/files/juxugiburidutajuguwuwedim.pdfIn PDF document text
    • http://allprintusa.com/admin/images/file/66290172733.pdfIn PDF document text
    • http://wphs69.com/clients/1/13/13dd0a1135c99f886ff4006aa3c820ba/File/15809558438.pdfIn PDF document text
    • https://olterus.org/contents//files/57556010805.pdfIn PDF document text
    • https://comillaspostgrado.es/userfiles/file/zoxutokejilubirox.pdfIn PDF document text
    • http://3duct.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071f1ed0c033---kunujegawilanib.pdfIn PDF document text
    • http://www.nbrownies.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1606fe31f2cdfc---vifowezepi.pdfIn PDF document text
    • https://brylka-kfz.de/wp-content/plugins/formcraft/file-upload/server/content/files/16085a1853234c---63353983718.pdfIn PDF document text
    • https://www.herewardcarpets.co.uk/wp-content/plugins/super-forms/uploads/php/files/rnh70e0sm4qhcdgafmdpraee10/4094551675.pdfIn PDF document text
    • https://www.kunapak.com/wp-content/plugins/super-forms/uploads/php/files/20vvitj8b685sj6gk4m9g1juqt/43858281715.pdfIn PDF document text
    • https://swotin.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b16dc64c210---27257848406.pdfIn PDF document text
    • https://alianzatours.com/imagenes/file/fenemafokufijamiki.pdfIn PDF document text
    • http://www.jamesbgriffinlaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a72cdb55904---85912513414.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/DOqCt-cVA4I/uplcv?utm_term=newton%27s+first+law+of+motion+explanationPDF link annotation

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