Malicious PDF — malware analysis report

Static analysis result for SHA-256 7eced12c91cdf7f2…

MALICIOUS

PDF

43.7 KB Created: 2021-09-12 00:51:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 3c2a04723a8ccf41877627e02307e48e SHA-1: 36c9376538686994e6c2ee2a05905a596262d7d1 SHA-256: 7eced12c91cdf7f246585e9f8ade0b7709be58f006aa262c0b24e411afb6d5f9
132 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains embedded JavaScript and a large number of external URIs, many of which point to disposable hosting, indicating a link farm designed to obscure the final malicious destination. The presence of embedded JavaScript suggests it is used to execute malicious actions, likely to redirect the user or download a secondary payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7355

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
  • 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 http://resurrection-life.net/userfiles/files/povuw.pdf In PDF document text
    • http://na-bytecek.cz/UserFiles/File/bepitedosunenakani.pdfIn PDF document text
    • http://xinge168.com/uploads/files/20210906031350_812632.pdfIn PDF document text
    • http://cdseoulps.com/uploadfile/fckeditor/file/50602628291.pdfIn PDF document text
    • http://derp74.fooden.com/UserFiles/files/18893758145.pdfIn PDF document text
    • https://www.vigo.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1612f6d735d02d---labunarejorowoniwifususif.pdfIn PDF document text
    • http://portaldo.eu/contenuti/upload/file/29870526194.pdfIn PDF document text
    • http://flamefitnessstudio.com/cewit/images/file/55382551769.pdfIn PDF document text
    • http://nfc-lampang.com/user_img/files/53446814990.pdfIn PDF document text
    • http://gesht.ru/admin/ckfinder/userfiles/files/1494977455.pdfIn PDF document text
    • https://wsbe17hongkong.hk/_bin/ckfinder/userfiles/files/sumisegokenef.pdfIn PDF document text
    • https://shastriratanchatterjee.com/ckfinder/userfiles/files/57995252911.pdfIn PDF document text
    • http://www.bandungmesin.com/file/wekigezubetowofik.pdfIn PDF document text
    • https://www.vek-bg.com/app/templates/js/ckfinder/userfiles/files/xubivavovekojigidi.pdfIn PDF document text
    • http://gitishahjahanpur.org/ckfinder/userfiles/files/wemonol.pdfIn PDF document text
    • http://co-wemart.com/careeruserfiles/file/nexuvijiworem.pdfIn PDF document text
    • http://superfasttv.com/uploads/files/55029221366.pdfIn PDF document text
    • https://5uempat.com/contents/files/jiramiwisen.pdfIn PDF document text
    • http://duoctruongxuan.vn/userfiles/image/file/24754399443.pdfIn PDF document text
    • http://aleeblog.com/wp-content/plugins/super-forms/uploads/php/files/grrinb2psl7b1mae6rl2kdnbj0/kotizevovedumepesus.pdfIn PDF document text
    • http://architettoangeli.it/userfiles/files/58621703966.pdfIn PDF document text
    • https://pagodatalk.com/_UploadFile/Images/file/50670656487.pdfIn PDF document text
    • http://ajtoablakcentrum.com/_user/file/donimig.pdfIn PDF document text
    • http://bydnjl.com/userfiles/files/1220293627.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1xuhb7AK25c/uplcv?utm_term=martin+luther+king+autobiography+pdfPDF link annotation

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