Malicious PDF — malware analysis report

Static analysis result for SHA-256 033ed55bf67dbecd…

MALICIOUS

PDF

63.7 KB Created: 2021-08-07 21:43:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: bbc4ed635711c2b0da0a9bbdbbfac1e2 SHA-1: a68a1799d6ad0d48fff43eaf5d100246e9f7db4e SHA-256: 033ed55bf67dbecdcc13eec730c03ed7efe0f84672cc36eca3b2174366ab5e05
162 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains an embedded JavaScript stream and numerous external URIs, many of which point to compromised CMS upload directories. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a large number of links on disposable hosting, suggesting an attempt to manipulate search engine rankings or distribute malicious content. ClamAV detection as 'Pdf.Phishing.Trojan' further supports a malicious classification.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7569

Heuristics 6

  • 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.
  • 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://kassa-evotor.ru/wp-content/plugins/super-forms/uploads/php/files/rmia8j0vlro2gpncfk6cjqc1th/64876470060.pdf In PDF document text
    • http://caratow.eu/userfiles/file/kimafofusux.pdfIn PDF document text
    • https://prosperitas.be/data/assets/file/15320387136.pdfIn PDF document text
    • https://www.sgestrecho.es/wp-content/plugins/formcraft/file-upload/server/content/files/16087435dbc577---45766739007.pdfIn PDF document text
    • https://livingcircles.ch/wp-content/plugins/formcraft/file-upload/server/content/files/16071fcd24472e---98504765167.pdfIn PDF document text
    • http://zawayakw.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608b3e8443ca8---sezijog.pdfIn PDF document text
    • http://lncxjzxxw.com/upload_fck/file/2021-5-22/20210522072530310819.pdfIn PDF document text
    • http://zelene-centrum.cz/webpagebuilder/ckfinder/userfiles/files/viboxebobi.pdfIn PDF document text
    • http://edwardfmcgintypa.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/4386354069.pdfIn PDF document text
    • https://fentesmakina.com/paket/upload/files/46741252026.pdfIn PDF document text
    • http://www.alfainstal.pl/wp-content/plugins/formcraft/file-upload/server/content/files/16075e45f7a8e2---92916403043.pdfIn PDF document text
    • http://hosungtour.net/FileData/ckfinder/files/20210805_1568BA8846C0A74D.pdfIn PDF document text
    • http://az4group.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160ed859561159---rowavatofinexukivoj.pdfIn PDF document text
    • https://www.opdrrustukalac.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f2299eba03---gimufefevepo.pdfIn PDF document text
    • https://bettyloupaints.com/userfiles/files/rasotob.pdfIn PDF document text
    • https://www.dishdivvy.com/wp-content/plugins/super-forms/uploads/php/files/e6b2d17d334a936a7356c68b7381e9b2/45459582318.pdfIn PDF document text
    • http://alwaditrading.com/userfiles/files/67708185942.pdfIn PDF document text
    • https://olterus.org/contents//files/zasite.pdfIn PDF document text
    • http://honda-vo.com/upload/file/xudekisix.pdfIn PDF document text
    • https://www.azembay.com/wp-content/plugins/super-forms/uploads/php/files/8a6o3i7tp77ge1ua6dipe5643g/10241676251.pdfIn PDF document text
    • https://pcparts.fr/ckfinder/userfiles/files/xubimegigitef.pdfIn PDF document text
    • http://rydelko.pl/userfiles/file/2148489975.pdfIn PDF document text
    • https://soyana.de/js/ckfinder/userfiles/files/8864611387.pdfIn PDF document text
    • http://dispensapertutti.com/userfiles/files/fozirenamazar.pdfIn PDF document text
    • http://elenasteele.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b7405baf91a---lafavupo.pdfIn PDF document text
    • http://carrasvilla.es/uploads/files/54755135066.pdfIn PDF document text
    • http://bjaimama.com/data/upload/2021/06/file/202106201228033545.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/S30rS-6n6vg/uplcv?utm_term=unblocked+games+66+world+basketball+legends+halloweenPDF link annotation

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