Malicious PDF — malware analysis report

Static analysis result for SHA-256 5b27a04ea783d2a9…

MALICIOUS

PDF

64.0 KB Created: 2021-07-13 17:01:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 58f246e962c4a135a1bb5524e3c25733 SHA-1: 5c5a6a376458e0ee287f1b528e7a8b2f752eae4e SHA-256: 5b27a04ea783d2a950853ca0e3cd039c065d7477d833c6c614d08c2e226d8f55
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 URLs, many of which are hosted on compromised WordPress sites. The ClamAV detection and ML classifier strongly indicate malicious intent, likely for phishing or distributing further malware. The document's structure and the nature of the linked URLs suggest it's designed to lure users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5615

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 https://completecollegestrategies.com/wp-content/plugins/super-forms/uploads/php/files/dc8550c04ba43084f39c59a912d7769d/44370959726.pdf In PDF document text
    • https://www.rogierstoel.nl/wp-content/plugins/super-forms/uploads/php/files/1j50jpmsta8mper3f4h0jehh6d/62026167297.pdfIn PDF document text
    • http://www.cascinasorigherio.it/wp-content/plugins/formcraft/file-upload/server/content/files/160a36745e9af6---56462780120.pdfIn PDF document text
    • http://grandchainfamilyfoundation.org/clients/85333/File/turalewularidutusi.pdfIn PDF document text
    • http://xn--pr3b03lcdvwu9dpynqkc.com/DATA/file/20210618055336.pdfIn PDF document text
    • http://www.next-conseil.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160746b0c96bfc---76305536724.pdfIn PDF document text
    • https://hyosungulf.com/uploads/file/6924876874.pdfIn PDF document text
    • https://grupo-kayros.com/userfiles/file/zodusederaduxamipa.pdfIn PDF document text
    • http://www.commandinglife.com/wp-content/plugins/formcraft/file-upload/server/content/files/160af94d3113c2---6292097225.pdfIn PDF document text
    • http://klefmarken.se/upload/file/17596839436.pdfIn PDF document text
    • http://finsura-lifedirect.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16085beadb1da9---vunat.pdfIn PDF document text
    • http://guojingmall.com/userfiles/file///dadiwabexiwep.pdfIn PDF document text
    • http://inglewoodreunion.com/clients/68690/File/dewiwizun.pdfIn PDF document text
    • https://alate.org/admin/fckeditor/editorfile/63703656095.pdfIn PDF document text
    • http://barnesfamilyconnection.com/clients/f/f3/f37d50667a1bb99e511e26172889fab9/File/15520498931.pdfIn PDF document text
    • https://www.diktu.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609477a341ce3---92738043735.pdfIn PDF document text
    • http://guowangcable.com/d/files/zagosagiw.pdfIn PDF document text
    • http://drvision.org/wp-content/plugins/formcraft/file-upload/server/content/files/160893f1096af6---jadufijurogokeduzusafis.pdfIn PDF document text
    • http://hublihorse.com/uploads/userfiles/files/tevizobi.pdfIn PDF document text
    • https://alakharia.com/public_html/userfiles/file/96392676715.pdfIn PDF document text
    • https://stopserv.ru/files/file/47838803575.pdfIn PDF document text
    • https://www.charityweiss.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607dffa2d0f63---doxofajuxos.pdfIn PDF document text
    • https://expungemyrecordnj.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d96987c2ee6---75921724572.pdfIn PDF document text
    • http://chixue.com/uploadfile/file/20210525050147.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/FevRqgeaUVY/uplcv?utm_term=why+murals+are+importantPDF link annotation

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