Malicious PDF — malware analysis report

Static analysis result for SHA-256 812b2dc0c1392960…

MALICIOUS

PDF

44.2 KB Created: 2021-09-02 10:56:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 9525717f392e2a68dc3a8075c0f5da6f SHA-1: 0f10a818e947af6aaa31381598a63b6bd49b8604 SHA-256: 812b2dc0c13929608eb648b3870c0487e9b5d7b743d42752f3fed3b972622e39
154 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a phishing or malware distribution intent. It functions as a link farm, containing numerous URLs pointing to compromised CMS uploads and disposable hosting, likely to obscure the final malicious destination. The presence of multiple distinct hosts and link farm heuristics strongly suggests an attempt to lure users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8311

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://pbpkrosno.com/fckfile/mifiwuzoxex.pdf In PDF document text
    • https://thaiwoodengames.com/files/upload/files/lipone.pdfIn PDF document text
    • http://michelesherrinlaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/bivalijowofemenij.pdfIn PDF document text
    • http://festivaldeliteraturadepereira.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aff38a6a8cd---tasodubagepowuzer.pdfIn PDF document text
    • https://hartwellcook.com/wp-content/plugins/super-forms/uploads/php/files/a3eab32b3cadad195465078955e95676/kagovelokilozesow.pdfIn PDF document text
    • http://bharatdarshan.net/rgroup/ckfinder/userfiles/files/30778920826.pdfIn PDF document text
    • https://www.asahinafunnels.com/wp-content/plugins/super-forms/uploads/php/files/pn5i0b20ovjasgjq93amjbr3u3/45483280042.pdfIn PDF document text
    • http://northphoenixmustangs66.com/clients/4/4b/4b49b54eec06ebba3741256e9f3e6f2b/File/86041259396.pdfIn PDF document text
    • https://rhdplumbing.com/wp-content/plugins/super-forms/uploads/php/files/416f470aa9d42479eddae9e9a95d264c/xowikawurotid.pdfIn PDF document text
    • https://amgaa.org/temp//files/fagamowafemidos.pdfIn PDF document text
    • https://electrabicycles.pl/app/webroot/uploads/file/16210836208281.pdfIn PDF document text
    • https://sgcaregiver.org/contents/files/39068704462.pdfIn PDF document text
    • http://kiiga.ru/userfiles/file/kinoxekawoparevivakene.pdfIn PDF document text
    • https://worldkelo.com/wp-content/plugins/super-forms/uploads/php/files/593369808d5ae1657553487b69850cb8/82791391545.pdfIn PDF document text
    • http://www.musicmaestrodiscos.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160a53b21a57bd---godumateb.pdfIn PDF document text
    • http://brezov-gaj.si/uporabnik/file/69376311731.pdfIn PDF document text
    • https://badoza.net/userfiles/file/dafelipumuk.pdfIn PDF document text
    • http://website-design-company.in/dev3/damodar/ckfinder/core/connector/php/userfiles/files/41670772863.pdfIn PDF document text
    • http://florylaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/legesexodo.pdfIn PDF document text
    • https://nutricionintravenosa.com/wp-content/plugins/super-forms/uploads/php/files/7c0522cd10d7802edf97f24e9c4ce608/6017832073.pdfIn PDF document text
    • https://gk-termopanel.ru/wp-content/plugins/super-forms/uploads/php/files/d0e61ae7a590e99128a0d8e8b0789052/78530376672.pdfIn PDF document text
    • http://studioboscono.it/userfiles/files/40835212229.pdfIn PDF document text
    • http://goghepcacloai.com/media/ftp/file/digujalokexavulexarivule.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/PmAiG5ZyT-k/uplcv?utm_term=cooling+tower+thermal+design+manualPDF link annotation

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