Malicious PDF — malware analysis report

Static analysis result for SHA-256 8a9c6100a8972a3f…

MALICIOUS

PDF

95.7 KB Created: 2021-09-19 06:02:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: df8f1ccad7926cf7502ce9e0922f2966 SHA-1: e7a442294e25a167c7e21c9748bb0dbb19d6f077 SHA-256: 8a9c6100a8972a3fa82a2fd419cc04216cb73ed31f45a5df959574d8c60d34d7
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which point to compromised WordPress uploads or disposable hosting, indicating a link farm designed to redirect users. ClamAV detected this file as 'Pdf.Phishing.Trojan-d2568dad23a94d95', and ML classification also flagged it as malicious. The primary attack pattern involves using the PDF as a lure to navigate users to potentially malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7761

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 http://getampedmag.com/ckfinder/userfiles/files/sosuzibunozugi.pdf In PDF document text
    • http://stressmanagement-karriere.de/userfiles/file/53537258501.pdfIn PDF document text
    • https://umartravel.com/files/23990753226.pdfIn PDF document text
    • http://denge.aero/upload/files/nazazabemidi.pdfIn PDF document text
    • http://entone.es/wp-content/plugins/super-forms/uploads/php/files/3ea37280d625e9dff15a5073a7f968f1/62780792916.pdfIn PDF document text
    • http://gwtcs.org/Content/uploads/files/42977914519.pdfIn PDF document text
    • https://nusbetaja2.com/contents/files/gurovepapesufe.pdfIn PDF document text
    • http://studioarchperissinotto.eu/userfiles/files/20287980904.pdfIn PDF document text
    • http://antonioruizabogados.es/userfiles/file/19230657550.pdfIn PDF document text
    • http://golfvillageonline.com/userfiles/file/56049481109.pdfIn PDF document text
    • http://www.advokat.com/app/webroot/img/fck/file/nafik.pdfIn PDF document text
    • http://www.ctnphrae.com/ckfinder/userfiles/files/96186315715.pdfIn PDF document text
    • https://maydongy.com/wp-content/plugins/super-forms/uploads/php/files/neqobgu5bi1jo29rdelhb870al/vomojenalegebedeladogeda.pdfIn PDF document text
    • https://phoenixknights.co.uk/wp-content/plugins/super-forms/uploads/php/files/1e663288408ff913b2ecaae2b8b3b03a/gowelozukedegimovenej.pdfIn PDF document text
    • http://sensitiva.fi/UserFiles/File/pozemajetunavuvu.pdfIn PDF document text
    • http://medicalproduct.hu/images/files/pepomidudopagikeruxej.pdfIn PDF document text
    • http://lafenicealcamo.it/userfiles/files/5848666553.pdfIn PDF document text
    • http://tubemakingmachine.com/uploadfile/files/58225665667.pdfIn PDF document text
    • http://csigikes.hu/admin/fck_upload/file/wobokaluzuxilaf.pdfIn PDF document text
    • http://househouse.it/userfiles/files/zufok.pdfIn PDF document text
    • https://umutisi.com/umut/upload/files/nuluxivoxisuwopus.pdfIn PDF document text
    • https://rwd.webseo.tw/upload/files/26779153629.pdfIn PDF document text
    • http://www.hcibatiment.fr/wp-content/plugins/formcraft/file-upload/server/content/files/161336693e7919---65984910021.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/YTWXjIUwRh0/uplcv?utm_term=surface+pro+x+vs+ipad+air+4PDF link annotation

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