Malicious PDF — malware analysis report

Static analysis result for SHA-256 5a9f526b36f95471…

MALICIOUS

PDF

47.6 KB Created: 2021-09-06 05:21:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-27
MD5: 1edc98052f7498d1c28d4a3a70ccaf35 SHA-1: 562d7f1a7702acc5611aa601427965bd2239e0f4 SHA-256: 5a9f526b36f95471ae73cf8995f1ce2a644a7ffb93a5c07619621bb6f400f944
94 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to compromised websites or disposable hosting. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a link farm strategy, and 'PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM' suggests these links lead to malicious content hosted on compromised CMS uploads. The ML classifier also flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7355

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://nomylo.ru/uplcv?utm_term=juegos+de+coordinacion+oculo+manual+para+adultos PDF link annotation
    • http://naturallabs.de/userfiles/file/60143664284.pdfIn PDF document text
    • https://dalnoboy.com/data/filestorage/upload/files/29321278120.pdfIn PDF document text
    • https://www.frankcapassoandsons.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d3f3221aa90---zebomuse.pdfIn PDF document text
    • https://hirurgija.me//files/fumasuzeduj.pdfIn PDF document text
    • http://kipia-nn.ru/userfiles/file/94970084492.pdfIn PDF document text
    • http://www.asejnrtigers.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1606e563b18d2b---57104773858.pdfIn PDF document text
    • https://www.hospedeagora.com.br/wp-content/plugins/super-forms/uploads/php/files/g73bbsdkpbhnom255hbco0n65c/41164601995.pdfIn PDF document text
    • http://alteredcompta.com/buddha/ckfinder/userfiles/files/13021094871.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613158f53860f---dubirubiwufegusivevimen.pdfIn PDF document text
    • http://www.garriagricola.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cb4ecd231c---79063375895.pdfIn PDF document text
    • http://famillespourstarlight.ca/clients/a/a9/a9b42c05011d3bb27e7f7ec2ed30324f/File/9365231311.pdfIn PDF document text
    • http://grupomarsamo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a4d505ce543---37453690233.pdfIn PDF document text
    • https://orrizon.ru/images/file/tuxofavunusejenejil.pdfIn PDF document text
    • https://www.dynasil.com/wp-content/plugins/super-forms/uploads/php/files/3bc5859159e05f11abcabe369faba01d/bonumibetupi.pdfIn PDF document text
    • http://www.fattyweng.com.sg/wp-content/plugins/formcraft/file-upload/server/content/files/1609ce6e3d90e4---guderuf.pdfIn PDF document text
    • https://www.idahomedia.com/wp-content/plugins/super-forms/uploads/php/files/68c8d056af0ee133820bd4006862baf7/24529704856.pdfIn PDF document text
    • http://limpiasol.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a3280beae0b---jijitanosifaro.pdfIn PDF document text
    • http://shopsuathientu.com/uploads/userfiles/file/75436998726.pdfIn PDF document text
    • http://szzxwx.com/Upload/Upload/file/2021723193455420.pdfIn PDF document text
    • https://www.travelticket.com.au/wp-content/plugins/super-forms/uploads/php/files/nnhbsmichhqj5e8lp182i6cpbt/79290312023.pdfIn PDF document text
    • http://www.sindafaz.com.br/admin/editor/ckfinder/userfiles/files/40400669461.pdfIn PDF document text
    • https://vate-tire.ru/wp-content/plugins/super-forms/uploads/php/files/b671a1222011abe17a645ced87025d4b/60602422673.pdfIn PDF document text
    • https://www.adcgrain.com/wp-content/plugins/super-forms/uploads/php/files/cc9b114de94d02cd95f85791c44c77b5/24784327854.pdfIn PDF document text
    • http://ajivikafinance.com/userfiles/file/72789404471.pdfIn PDF document text

Related samples 8

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