Malicious PDF — malware analysis report

Static analysis result for SHA-256 c24302e560b0a0d4…

MALICIOUS

PDF

50.2 KB Created: 2021-05-28 03:05:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 71e9278bbacf202cd5207e9e7d2a8a46 SHA-1: e9e2d38ed9e478b1f40d28ed4b1b6dbe11a85df5 SHA-256: c24302e560b0a0d447b24f2e68b48eb68d063165779a6a4f45f380953da9859d
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a phishing or trojan payload. It contains numerous links, many pointing to compromised CMS uploads and disposable hosting, suggesting a link farm designed to redirect users to malicious sites. While no scripts were explicitly extracted, the PDF structure and link farm heuristics strongly suggest an attempt to redirect users, likely as part of a phishing campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7327

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
  • 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://solarconsulting.org/wp-content/plugins/super-forms/uploads/php/files/aa4c00c38f3355075daa6be40c83e5b7/35121082651.pdf In PDF document text
    • http://compie.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16085b0a5e0171---93619019053.pdfIn PDF document text
    • https://empylean.com/wp-content/plugins/super-forms/uploads/php/files/1pl9ft04ve2k1vnpfle75iolkf/vesub.pdfIn PDF document text
    • https://phoenixknights.co.uk/wp-content/plugins/super-forms/uploads/php/files/2260ddbb2667807606142b9bdc350cae/89165679399.pdfIn PDF document text
    • https://mandalaconfeccao.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1609a496da68ae---tafemovidogotusuwel.pdfIn PDF document text
    • http://www.peopleoftheheath.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607562518dbbe---kezoworew.pdfIn PDF document text
    • https://hylyt.co/wp-content/plugins/super-forms/uploads/php/files/cef12b40dad6352b6faece445d4c964b/senafunatobugefulepu.pdfIn PDF document text
    • http://xn--80aafkqcanfpgnhbng3b5i9a.xn--p1ai/pict/file/65938403602.pdfIn PDF document text
    • http://www.gametimecatering.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a6b60ca8bb7---65555032102.pdfIn PDF document text
    • https://autoschiller.de/wp-content/plugins/formcraft/file-upload/server/content/files/160ad676338ec0---90383254732.pdfIn PDF document text
    • https://addsfly.com/userfiles/file/bawarefebewiziripol.pdfIn PDF document text
    • http://a-swiss.com/upload/userfiles/file/lutaxusomejokosu.pdfIn PDF document text
    • https://www.bouldersudbury.org/wp-content/plugins/formcraft/file-upload/server/content/files/160a4f1473115e---80663074572.pdfIn PDF document text
    • https://www.travelticket.com.au/wp-content/plugins/super-forms/uploads/php/files/64nfp20s8doppsmfr02prhnme9/4637582077.pdfIn PDF document text
    • http://smithmurdock.com/wp-content/plugins/formcraft/file-upload/server/content/files/16089908650e62---girunodix.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1xuhb7AK25c/uplcv?utm_term=dumb+and+dumber+car+singing+scenePDF link annotation

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