Malicious PDF — malware analysis report

Static analysis result for SHA-256 81b1f07966f4bc58…

MALICIOUS

PDF

54.6 KB Created: 2021-07-01 23:04:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 6d2b73f21668890c46d259653921c3b7 SHA-1: 62688c97c35df44e3b8db16b0cbd6409b36b8918 SHA-256: 81b1f07966f4bc58e5a8f40ca090a15c79e93834bd8ad44481f844be75f658d9
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier. It functions as a link farm, containing numerous URLs pointing to compromised WordPress sites and disposable hosting, likely to distribute further malware or phishing content. The presence of external URIs and link farm heuristics indicates an attempt to redirect users to malicious destinations.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5222

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://intelean.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d6f0030bc81---zazev.pdf In PDF document text
    • http://banghetretunhien.com/media/ftp/file/60912835577.pdfIn PDF document text
    • http://cyuanmei.com/userfiles/file/pixiwufawukibuzum.pdfIn PDF document text
    • http://www.sevenchurchestour.net/seven/wp-content/plugins/formcraft/file-upload/server/content/files/16096428d18591---libiwopi.pdfIn PDF document text
    • https://bykevin.com/wp-content/plugins/super-forms/uploads/php/files/f38e0d36bc40aef15d1e3e1a7bf543f9/41103107770.pdfIn PDF document text
    • http://makaifruits.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d07dd93ca7---39918395168.pdfIn PDF document text
    • https://ipcare.nl/wp-content/plugins/super-forms/uploads/php/files/18njbsq991ciuvvneur3q0lu0u/86279123453.pdfIn PDF document text
    • https://truck-diagnostic.ru/wp-content/plugins/super-forms/uploads/php/files/34868b2d15183a7baf50fae88e005882/tizopizo.pdfIn PDF document text
    • https://kindliving.org/wp-content/plugins/super-forms/uploads/php/files/tmp/53604725056.pdfIn PDF document text
    • http://totalfinance.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160a68e631b145---77058111402.pdfIn PDF document text
    • https://gulertrafik.com/wp-content/plugins/super-forms/uploads/php/files/3vptcq2mbf4rsnree17tg6bsvd/27346017498.pdfIn PDF document text
    • http://ttlengenharia.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160c3f86e0c8a4---vuzewarigasuguxini.pdfIn PDF document text
    • http://israel-aliya.com/wp-content/plugins/super-forms/uploads/php/files/68de53f45a68933379d6932bf9e448ac/repawinimuwuzatekari.pdfIn PDF document text
    • http://change4best.ru/upload/file/47492389945.pdfIn PDF document text
    • http://skuplaptop.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1607690d1639e7---90931650210.pdfIn PDF document text
    • https://www.frontierexim.com/wp-content/plugins/super-forms/uploads/php/files/seta64gn11nj9m6m44nnm0pcq7/63427297697.pdfIn PDF document text
    • https://qualitylightsolutions.com/wp-content/plugins/super-forms/uploads/php/files/e372916411a27eeb93461bd2261540ad/20470948898.pdfIn PDF document text
    • http://orrizon.ru/images/file/20980106832.pdfIn PDF document text
    • https://tedvandergulik.nl/userimages/file/namikivizolagoza.pdfIn PDF document text
    • https://carpanea.it/wp-content/plugins/super-forms/uploads/php/files/f6449990ef0ecc8db026c10a1236c64f/48624183175.pdfIn PDF document text
    • https://macleanpinesdrivingschool.com.au/wp-content/plugins/super-forms/uploads/php/files/336904c7800712408c206e2400183046/larezebulozagaluf.pdfIn PDF document text
    • http://chelseacarpet.com/ckfinder/userfiles/uploads/kalaruxogi.pdfIn PDF document text
    • https://e-lightingcontrols.com/wp-content/plugins/super-forms/uploads/php/files/d89ae0d8e9d9253b0597118dd1d4ac7d/60009025532.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a361c665600---retejagasotile.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BvfzZFkJO3s/uplcv?utm_term=how+to+add+songs+in+imovie+iphonePDF link annotation

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