Malicious PDF — malware analysis report

Static analysis result for SHA-256 8c9fcc89b7bf21d4…

MALICIOUS

PDF

47.7 KB Created: 2021-06-28 06:12:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-21
MD5: bba480f37e0452c7e614bf4f4f3b790f SHA-1: eac31076810d3cf936dbe0ad8fe26fd2a5fcf3f2 SHA-256: 8c9fcc89b7bf21d44ec9ea0d79d1edc19512089413d654b3049ed187bf63f31a
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external websites, many of which are hosted on compromised WordPress installations or disposable domains, indicating a link farm designed to redirect users to malicious content. The ClamAV detection and ML classifier strongly suggest malicious intent, likely for phishing or malware distribution. No scripts were extracted from this sample, but the presence of embedded URLs and the heuristic firings point towards a phishing or credential harvesting attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7355

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://kvgrup.com.ua/wp-content/plugins/formcraft/file-upload/server/content/files/160beff61b7e1e---lukoposigitoje.pdf In PDF document text
    • http://www.thebetterinsurance.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ef9d80ceb8---426592966.pdfIn PDF document text
    • http://batiment-tunisie.com/userfiles/file/lifosiwabulukawetipabe.pdfIn PDF document text
    • https://playgametoday.ru/wp-content/plugins/super-forms/uploads/php/files/d6929dc4054c190c58cce9de139d4ec7/dimadiv.pdfIn PDF document text
    • http://frederickfollows.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160a1895d9d4a8---buxatusimofizo.pdfIn PDF document text
    • https://www.saenger-ohg.de/wp-content/plugins/formcraft/file-upload/server/content/files/1609b72bd01b78---rubelovidilufe.pdfIn PDF document text
    • https://www.birdandwildlifeteam.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b927613d7b9---99480430372.pdfIn PDF document text
    • http://makaifruits.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609cb2156b547---fusudome.pdfIn PDF document text
    • http://artmetinc.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071cc24c9d21---vubazoposulaxazukaropawu.pdfIn PDF document text
    • http://bpsstudio.hu/uploads/71251204353.pdfIn PDF document text
    • https://humble-brag.com/wp-content/plugins/super-forms/uploads/php/files/bjgbr4tmnglttv7sqvph9do7ge/kipeliginidanepamenesawi.pdfIn PDF document text
    • http://krindustria.com.br/site/wp-content/plugins/formcraft/file-upload/server/content/files/1608017a18317e---wazurijunig.pdfIn PDF document text
    • http://cathugo.de/res/wysiwyg/file/29876549008.pdfIn PDF document text
    • https://agrotehholding.ru/wp-content/plugins/super-forms/uploads/php/files/b1fc39646fe18bb12507fcf6e845179d/9768161318.pdfIn PDF document text
    • https://alianzatours.com/imagenes/file/kejewupipukosasawajudav.pdfIn PDF document text
    • http://bet-balance.com/userfiles/file/juzebejekarogunadujumapuj.pdfIn PDF document text
    • http://yatros.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160a9de4d634a0---mokiraximovataropakutox.pdfIn PDF document text
    • https://fortlauderdale-carservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b16f4614c66---kiliguvelojizexuxufixenig.pdfIn PDF document text
    • https://www.karenlovelee.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609d9ee50ae1f---pufozubebutasakavos.pdfIn PDF document text
    • http://mobilesamara.com/img/files/file/39204625528.pdfIn PDF document text
    • http://lavera.it/wp-content/plugins/formcraft/file-upload/server/content/files/16082d2f0c72e7---jisotewe.pdfIn PDF document text
    • http://bfr-bialapodlaska.pl/userfiles/file/ronirumugojenezafuxotik.pdfIn PDF document text
    • https://amartzon.store/wp-content/plugins/super-forms/uploads/php/files/be830300b8742c33018ae0775910da3e/xizituxa.pdfIn PDF document text
    • http://jump360.co/upload/files/20210622200854.pdfIn PDF document text
    • https://www.expoagrogto.com/wp-content/plugins/super-forms/uploads/php/files/rlavvu9fj9c27f3du2ba9hjoi2/gezapoxowakamubori.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/GLLx1DTH0VQ/uplcv?utm_term=macronutrients+for+low+carb+dietPDF link annotation