Malicious PDF — malware analysis report

Static analysis result for SHA-256 508f0f07ec662ec3…

MALICIOUS

PDF

83.9 KB Created: 2021-07-02 21:52:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 0866d3766ed7a8c1b872abdc1bf89d23 SHA-1: 2922033e2e9512ed82aaa92512f0ca5f9d4e1d55 SHA-256: 508f0f07ec662ec3c71fc5c226bd03a8c2189e3e75740edbb618ae3ea0111562
124 Risk Score

Malware Insights

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

The file is identified as a malicious PDF by ClamAV, specifically a phishing trojan. Static analysis reveals it functions as a link farm, with numerous URLs pointing to compromised WordPress sites hosting other PDFs. These linked PDFs are likely designed to lure victims into downloading further malicious content or providing sensitive information.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.4833

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://sellerflows.com/wp-content/plugins/super-forms/uploads/php/files/2992e5fe75c54ea3b043d613e925c135/30199296148.pdf In PDF document text
    • https://masterok-kovka.ru/wp-content/plugins/super-forms/uploads/php/files/7a1c52668c5a26eef6e8ef2fab648311/tadinevaxuv.pdfIn PDF document text
    • http://lilit-realty.com/wp-content/plugins/super-forms/uploads/php/files/pp52ho9g0a40ndoshi1a12fds6/wijofesip.pdfIn PDF document text
    • https://ivanda-commerce.hr/userfiles/file/27229803493.pdfIn PDF document text
    • https://law.com.sg/wp-content/plugins/super-forms/uploads/php/files/cd5528b505181d13b093330782f70c7f/tibotalenisaguxip.pdfIn PDF document text
    • https://vashadvokat82.ru/wp-content/plugins/super-forms/uploads/php/files/38dad156dded0a196c3454cbb9266887/83850510286.pdfIn PDF document text
    • https://patriot.ch/wp-content/plugins/super-forms/uploads/php/files/nmin82cq2nhq0e7mlguvnst50m/sopifavubenusam.pdfIn PDF document text
    • http://nesthomes.in/userfiles/file/1002486970.pdfIn PDF document text
    • https://www.colours-of.com/wp-content/plugins/super-forms/uploads/php/files/9v6otmsmqbp8kshjgrnru9d6t9/97565584880.pdfIn PDF document text
    • https://www.ciabrini-immobilier.com/wp-content/plugins/super-forms/uploads/php/files/hi3e075bbk5hua4oed61cie1la/rumovaxufato.pdfIn PDF document text
    • http://angelcabrera.com/FCKfiles/file/koraxadopejuj.pdfIn PDF document text
    • https://ahi.com.ua/wp-content/plugins/super-forms/uploads/php/files/f1459f6159c8c9d9c110e21d8dfee6f5/76351299201.pdfIn PDF document text
    • http://am-assets.com/aom/magnolia/userfiles/file/fenixorabeparobajage.pdfIn PDF document text
    • http://stepasidemedical.com/images/uploads/file/jilesa.pdfIn PDF document text
    • https://www.travelticket.com.au/wp-content/plugins/super-forms/uploads/php/files/49b3h2o817d53u9i5i9g2js2jb/88018536868.pdfIn PDF document text
    • http://anhuizhkj.com/upload_fck/file/2021-4-30/20210430141032880075.pdfIn PDF document text
    • http://www.qookspot.kitchen/wp-content/plugins/formcraft/file-upload/server/content/files/1606f21cfcb0e4---zuturufepepulinodenebik.pdfIn PDF document text
    • https://travelinnsuites.com/nbloom/fckuploads/file/nofodox.pdfIn PDF document text
    • https://www.northamericatalk.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082e0a80c11b---ruwewovupo.pdfIn PDF document text
    • https://tecsal.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1609d22a5971df---julol.pdfIn PDF document text
    • http://quaint-house.com/81999845336.pdfIn PDF document text
    • https://kalatranslation.co.uk/wp-content/plugins/super-forms/uploads/php/files/k2jtqnurpe3khtpgg3c0g392ta/27706119444.pdfIn PDF document text
    • https://briljant-maleri.se/UserFiles/files/16870026591.pdfIn PDF document text
    • https://www.nestroots.com/wp-content/plugins/super-forms/uploads/php/files/7vp6n77dqj2n9a29cmhl0amno5/53531298038.pdfIn PDF document text
    • http://autodilykanka.cz/cmsimple/images/file/buwuzalig.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/YTWXjIUwRh0/uplcv?utm_term=lsat+examples+and+answersPDF link annotation

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