Malicious PDF — malware analysis report

Static analysis result for SHA-256 d67e0ccb9949af18…

MALICIOUS

PDF

101.5 KB Created: 2021-07-30 16:27:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 8abbf72bacf669cb15f47bd3921b2815 SHA-1: 12f32829f7b1fd05e7898ef76353d5bcd3fbbdba SHA-256: d67e0ccb9949af1871303879bdf9603d19e4595e1368a24d7ba215b6201b6cc5
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple heuristics indicating it is a link farm hosted on compromised WordPress sites, designed to redirect users to other potentially malicious PDF files. ClamAV detected this file as Pdf.Phishing.Trojan, and ML classification also flagged it as malicious. The presence of numerous links to disposable hosting and compromised CMS uploads suggests a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9682

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://too.kg/wp-content/plugins/super-forms/uploads/php/files/e41e9e7e75fc48de7d61a98250c55111/sezirixazanafajeduridege.pdf In PDF document text
    • http://www.viksexteriors.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075eb97a4e7d---33070209218.pdfIn PDF document text
    • https://vettercycles.ch/userfiles/files/pitimesezemiripif.pdfIn PDF document text
    • http://a-range.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160843b2590410---jefuvenesaruvadamude.pdfIn PDF document text
    • http://www.everhouse.lt/wp-content/plugins/formcraft/file-upload/server/content/files/16098d35cde250---58306342742.pdfIn PDF document text
    • https://www.gurgy.net/ckfinder/userfiles/files/zoken.pdfIn PDF document text
    • http://ljhalls.com/wp-content/plugins/super-forms/uploads/php/files/4b61228d41edf438fb3b8f3e5be86ab7/72143342083.pdfIn PDF document text
    • https://master.plus/wp-content/plugins/super-forms/uploads/php/files/a59f3850c668acb331deb053455a2192/90543619085.pdfIn PDF document text
    • https://hpx.com.ua/wp-content/plugins/super-forms/uploads/php/files/3f790b972c941f8aeefc27751fda3c8d/26982854862.pdfIn PDF document text
    • http://zoltysnieg.pl/pliki_wyswig/files/fipofusiwemimixeso.pdfIn PDF document text
    • http://xn--d1achljw0b.xn--p1ai/content/upload/316735977.pdfIn PDF document text
    • http://niezapominajkowo.eu/userfiles/file/29670669912.pdfIn PDF document text
    • http://www.monts.sk/upload_images/file/65132964066.pdfIn PDF document text
    • https://alexandrapanayotou.com/web/images/static/file/sudupalaxepupuxum.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1xuhb7AK25c/uplcv?utm_term=obra+de+her%C3%A1clito+de+%C3%A9fesoPDF link annotation
    • https://sharpspringwww.kinsta.cloud/wp-content/plugins/super-forms/uploads/php/files/b3d2988dd96d0c0f34f627e4f29f19e2/20793077952.pdfIn PDF document text

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