Malicious PDF — malware analysis report

Static analysis result for SHA-256 99fb0c8049671b9a…

MALICIOUS

PDF

68.5 KB Created: 2021-09-13 23:32:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 285f72bce79cf8611ddeef98a06c7096 SHA-1: da8196725fe00d5b909e2328a02f7a889a5500cb SHA-256: 99fb0c8049671b9a12bed68f5ca8c6e9dfb460d37c49e3f31fb30d7ebdf81f3e
64 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains numerous embedded URLs, many of which are part of a link farm hosted on disposable domains. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a high likelihood of malicious intent, suggesting the document is designed to redirect users to potentially harmful content. The ML classifier also flagged the PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6678

Heuristics 3

  • 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://synerhu.ru/uplcv?utm_term=download+resident+evil+1+remake+android
    • http://giteduguedesboires.fr/userfiles/file/zimot.pdf
    • http://kingalbertltd.com/uploadedfiles/file/48145650405.pdf
    • http://profitoolinfo.ru/ckfinder/userfiles/files/29933764061.pdf
    • https://atlasautoglass.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613346edbc3e4---ligiz.pdf
    • https://arrad.ch/modules/ck/ckfinder/userfiles/files/putezivegixid.pdf
    • https://gangwontaxi.com/FileData/ckfinder/files/20210904_069421830FF0EB88.pdf
    • http://viral-list-monster.com/ckfinder/userfiles/publics/files/55127221650.pdf
    • https://cordovajewelry.com/images/file/4749598144.pdf
    • http://gardensyellowcab.com/admin/images/file/17891763564.pdf
    • http://maginsaatmetal.com/resimlerfiles/5680175872.pdf
    • http://dexgerm.com/data/file/userfiles/files/43208926698.pdf
    • http://orderleesushi.com/uploads/files/89381292759.pdf
    • https://institut-arabe.org/ckfinder/userfiles/files/dodokewopipemobijoledidu.pdf
    • http://www.kevinbrooks.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1613f9c1c4cdf0---gizononujimi.pdf
    • http://erago.cidees.com/uploads/files/xurazevo.pdf
    • http://abimobiliare.pl/pliki/File/1181757558.pdf
    • http://palmdale.thepokeluau.com/uploads/files/14045886664.pdf
    • http://xn--4k0b43gkwo4gn.com/upload/editor/file/tunufiminisubav.pdf
    • http://arcos-eff.it/userfiles/files/24314416681.pdf
    • https://ichapps.peaceofworld.com/ichapps/ckeditor-ckfinder-integration/uploads/files/lenega.pdf
    • http://aurora-c.jp/files/files/63778985845.pdf
    • http://vasvaripalmuzeum.hu/upload/file/7053981785.pdf

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