Malicious PDF — malware analysis report

Static analysis result for SHA-256 d20cae74bc3e76f6…

MALICIOUS

PDF

70.7 KB Created: 2021-08-14 06:01:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-29
MD5: 327708f0ab0cb49845d4cd7e815b4886 SHA-1: 59f520f132fbeaa56833f52ad0bab6d1332d7ca8 SHA-256: d20cae74bc3e76f651635af1a04dd907b296d25c3f39edc849a8f59193f075a8
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a link farm pointing to numerous domains, many of which appear to be hosted on compromised CMS uploads or disposable hosting. ClamAV detection as 'Pdf.Phishing.Trojan' and ML classification further support its malicious nature. The primary goal appears to be directing users to potentially malicious external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8734

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 http://permianhighschool1970.com/clients/e/ef/efee9fcbc667252fc4b649c8163d3733/File/84510473905.pdf In PDF document text
    • https://ltssinternational.com/res/wysiwyg/file/texoken.pdfIn PDF document text
    • http://www.prieteniitehnicii.ro/documente/file/26740011623.pdfIn PDF document text
    • http://ressourcengarten.de/azubi/userfiles/files/2740099541.pdfIn PDF document text
    • http://xn--80ackbssfuieecff0e8c.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/vlm3ivjoaqtrlclri8khtu6sm3/59467726770.pdfIn PDF document text
    • http://doo-san.com/userfiles/file/20210511210042.pdfIn PDF document text
    • http://maidnheaven.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c3f4ee553b---15532525038.pdfIn PDF document text
    • http://7seapharmtech.com/Uploadfiles/files/69878000243.pdfIn PDF document text
    • http://bajcsidavidfoto.com/_user/file/209856658.pdfIn PDF document text
    • http://www.pilonidalsinus.gen.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1606e80d807be3---36795110070.pdfIn PDF document text
    • https://themodernla.com/wp-content/plugins/super-forms/uploads/php/files/964bf65c21419d82fbfe0cb23f0ff3f6/75808779488.pdfIn PDF document text
    • http://chukgoobok.com/files/fckeditor/file/92627432122.pdfIn PDF document text
    • http://ohappy.org/userData/board/file/mafewifisugutupuwube.pdfIn PDF document text
    • http://averon.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1606d68d09f961---66562047606.pdfIn PDF document text
    • https://dodatkireklamowe.pl/web/uploads/files/momitupofitulejozi.pdfIn PDF document text
    • http://fanta-life.com/userfiles/file/zuzodarutagerixu.pdfIn PDF document text
    • https://www.mclarenpress.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ecf17a1991---11978555326.pdfIn PDF document text
    • https://www.burit.net/wp-content/plugins/formcraft/file-upload/server/content/files/1608ffc2c5e1cf---wokejezoxukobinak.pdfIn PDF document text
    • https://callhfelectric.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608598cf6d476---78785631060.pdfIn PDF document text
    • https://trungtamgiasuhcmmq.com/uplaod/quangtri/files/doboleteruzabupi.pdfIn PDF document text
    • http://www.microsinusectomi.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072ab83dcd56---57342091928.pdfIn PDF document text
    • https://www.qbuildsoftware.com/wp-content/plugins/super-forms/uploads/php/files/a18fa8dfbe6a31246b94274f701fcca3/winemorigaminufegewivam.pdfIn PDF document text
    • https://hoffmanowska.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160c07f0097a20---rakazamivuralawaviwup.pdfIn PDF document text
    • http://heyumpnd.com/userfiles/file///2776350108.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/GLLx1DTH0VQ/uplcv?utm_term=why+was+brown+bear+brown+bear+bannedPDF link annotation

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