Malicious PDF — malware analysis report

Static analysis result for SHA-256 f27383f1cba6f734…

MALICIOUS

PDF

48.4 KB Created: 2021-09-24 21:47:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 7ac20a1c84325f618b3d79818ac2189e SHA-1: 64251dfbbbd253b140ad6b66a48626723ec313b0 SHA-256: f27383f1cba6f734df1bf3376be002e6d1eb07bd1ba5f65d39b23db1a1b20b5f
162 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous URLs pointing to compromised websites and disposable hosting, indicating a phishing or malware distribution attempt. The ClamAV detection and ML classifier further support its malicious nature. The embedded JavaScript likely facilitates the redirection to these malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6678

Heuristics 6

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://drafthe.ru/uplcv?utm_term=class+of+clan+hack+version PDF link annotation
    • https://fo-prefectures.com/pages/files/67931743720.pdfIn PDF document text
    • https://limberhurstgallery.com/imageuploads/file/posul.pdfIn PDF document text
    • http://kingsfci.com/userfiles/file/12401079712.pdfIn PDF document text
    • https://baoholaodong24.com/userfiles/file/88148019514.pdfIn PDF document text
    • https://speedwayinfo.hu/uploads/file/43895280310.pdfIn PDF document text
    • http://centromp.it/userfiles/files/54996591037.pdfIn PDF document text
    • http://xperion.hu/wp-content/plugins/super-forms/uploads/php/files/3fb0afcbb38b8c8174ab34f6a797a3b2/tonovujefut.pdfIn PDF document text
    • http://tatugigo.com/ckfinder/userfiles/files/guvirev.pdfIn PDF document text
    • http://wowbond.com/upload/Fckeditor/file/sofuneduvexalajinafaresa.pdfIn PDF document text
    • http://creativecoms.net/userfiles/file/40115138119.pdfIn PDF document text
    • https://www.helpagesl.org/wp-content/plugins/formcraft/file-upload/server/content/files/1613e0828e64ab---vutugumigedelugir.pdfIn PDF document text
    • http://nwatchonline.com/userfiles/file/17268974969.pdfIn PDF document text
    • http://asirakademi.com/resimler/files/48146739089.pdfIn PDF document text
    • http://ljhalls.com/wp-content/plugins/super-forms/uploads/php/files/a72e9962dea1765ef195c4eda28939fe/sumomapubar.pdfIn PDF document text
    • http://www.veslovani-vsb.cz/soubory/file/85786810086.pdfIn PDF document text
    • http://centroolosprato.it/userfiles/files/10161970306.pdfIn PDF document text
    • http://dezis.ru/uploads/files/widesolimazidarimimokexip.pdfIn PDF document text
    • https://ariaparvaz.com/basefile/ariaparvazcom/files/rozutenutenujarogijesug.pdfIn PDF document text
    • https://jetaime-shop.dvsportbg.com/files/gimopuri.pdfIn PDF document text
    • http://petraifevronii.ru/ckfinder/userfiles/files/bisiruvorepafumojaweniwip.pdfIn PDF document text
    • http://www.findvoters.com/userfiles/file/vufoloduxogo.pdfIn PDF document text
    • http://m-styleauto.com/js/upload/files/zimimuposinonijiromaju.pdfIn PDF document text
    • http://yenidenyuzlendirme.com/ckfinder/userfiles/files/depanenaxozavilekavodum.pdfIn PDF document text
    • http://sitoad.com/bbqjoekey/files/202109050105231852.pdfIn PDF document text
    • https://wyslijpaczki.pl/app/webroot/files/userfiles/file/xubomokoje.pdfIn PDF document text
    • https://edubox.mn/uploads/users/0/files/gavawapoforalidotofexut.pdfIn PDF document text

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