Malicious PDF — malware analysis report

Static analysis result for SHA-256 ff7ee7be4afc92c9…

MALICIOUS

PDF

57.1 KB Created: 2021-09-12 14:14:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 83ee09ae221284210c7230847c34a046 SHA-1: 73f9c8a762349df488e7fe434f1918d7b518ffd4 SHA-256: ff7ee7be4afc92c9736538a1a0c0b9c5ff75f5b4d481fc7d99057d3750b81d80
162 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and a link farm pointing to multiple domains, many of which appear to be compromised or disposable hosting. The URLs suggest a lure for downloading software, likely a phishing or malware distribution attempt. The embedded JavaScript is likely used to facilitate the redirection or download process.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7093

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://inwebjor.ru/uplcv?utm_term=gta+5+mobile+download+ios+free PDF link annotation
    • http://ferrocom-spb.ru/userfiles/files/64323954632.pdfIn PDF document text
    • https://www.intermediastudios.com.mx/wp-content/plugins/super-forms/uploads/php/files/11277ffc11dc3bd5087b7cdb90431f46/fuxodutinifugeliki.pdfIn PDF document text
    • http://imapbook.com/fckeditor/editor/filemanager/connectors/php/userfiles/file/disifisamak.pdfIn PDF document text
    • https://vietnamwelder.vn/uploads/news_file/memuveroxazufigu.pdfIn PDF document text
    • http://lawcab.ru/wp-content/plugins/formcraft/file-upload/server/content/files/161358b6003281---78526597926.pdfIn PDF document text
    • http://aorganboys.handyfriendship.com/upload/files/6764040451.pdfIn PDF document text
    • https://www.bakkersvlaanderen.be/resources/plugins/ckfinder/userfiles/0/files/jorufubi.pdfIn PDF document text
    • http://www.dadosefatos.net.br/wp-content/plugins/formcraft/file-upload/server/content/files/16131d27dbecfc---lamifafukigolojat.pdfIn PDF document text
    • http://tvcsoltau.de/userfiles/file/25617130630.pdfIn PDF document text
    • http://tageedesign.com/ssmpt/documents/file/wojeleluja.pdfIn PDF document text
    • http://greenhere.cn/upload/ckimg/files/202109041913463890.pdfIn PDF document text
    • http://anduong-nhatthanh.com/uploads/news_file/lufakisibatufewi.pdfIn PDF document text
    • https://www.singaporemedicalclinic.com/ckfinder/userfiles/files/gawosutuk.pdfIn PDF document text
    • https://www.serwkom.pl/plugins/ckfinder/userfiles/files/57834323095.pdfIn PDF document text
    • http://smartcookieacademy.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613143d7239df---ropuginuxufatitobegufaj.pdfIn PDF document text
    • https://cytairtool.com/test/userfiles/file/20210909_2e20e.pdfIn PDF document text
    • https://oneremote.ru/wp-content/plugins/super-forms/uploads/php/files/5a040bcf8265a4bb3af8712f50d685b1/21554485178.pdfIn PDF document text
    • http://i-p-p-c.com/ckfinder/userfiles/files/90849822421.pdfIn PDF document text
    • http://pickup-ws.com/userfiles/files/33246207800.pdfIn PDF document text
    • https://chatsystem.site/js/ckfinder/userfiles/files/81336163498.pdfIn PDF document text

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