Malicious PDF — malware analysis report

Static analysis result for SHA-256 aeba0f284b93959d…

MALICIOUS

PDF

73.4 KB Created: 2021-06-24 07:05:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: ad3b2d0b127db9cade6da3692033fb97 SHA-1: da2b3da3e5a5da56daab536c14a1205cc13f8161 SHA-256: aeba0f284b93959ddd572d3d45f0835045fef5023264278bf5ff02344cebe0b5
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, indicating a high likelihood of malicious intent. It contains numerous links pointing to compromised websites and disposable hosting, suggesting it's part of a link farm designed to redirect users to malicious content. The presence of PDF_SEO_DISPOSABLE_LINK_FARM and PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM heuristics further supports this, indicating the document's primary purpose is to host and distribute links to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7539

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://www.napariverinn.com/wp-content/plugins/super-forms/uploads/php/files/dddca7ee53682e3334447e9ccfa9fb4f/zaridapuwirigonevutabed.pdf In PDF document text
    • http://www.rolstoellift.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aa783f6f0cb---47655678493.pdfIn PDF document text
    • http://hsi-international.com/ckfinder/userfiles/files/3833527716.pdfIn PDF document text
    • http://szpk.hu/_user/file/sasog.pdfIn PDF document text
    • https://www.tctnanotech.com/wp-content/plugins/super-forms/uploads/php/files/619b3fc7dfb4a6641de306cbaf0df037/36926807755.pdfIn PDF document text
    • http://mynigaoe.com/upload/file/20210510035706.pdfIn PDF document text
    • https://action-roofing.com/wp-content/plugins/super-forms/uploads/php/files/76a9d09b766238cdb293be5843099b53/vamojizamujajazidavuwot.pdfIn PDF document text
    • https://wavesmaroochydore.com/wp-content/plugins/super-forms/uploads/php/files/11rm8vj6qct590s10oiubi5upr/84493566528.pdfIn PDF document text
    • http://dabien.co.kr/wp-content/plugins/formcraft/file-upload/server/content/files/16081380762f11---98495030307.pdfIn PDF document text
    • http://www.benvenutialmare.com/wp-content/plugins/formcraft/file-upload/server/content/files/16094ba15b949f---tupuxewovinew.pdfIn PDF document text
    • https://www.audioclinica.pt/wp-content/plugins/super-forms/uploads/php/files/84g8gu1rdr1ivme6rg9nag11cp/sixis.pdfIn PDF document text
    • http://www.jamesbgriffinlaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/16081169a95d92---91011945914.pdfIn PDF document text
    • https://www.pal-kont.hu/wp-content/plugins/super-forms/uploads/php/files/f4d5054d594111918b398ae465063543/likojopaxitigoxavi.pdfIn PDF document text
    • https://www.skyline-recruiting.com/wp-content/plugins/super-forms/uploads/php/files/b038417c49a5ae6221a8e0371579f3ca/rinimitibedoxited.pdfIn PDF document text
    • http://smartmedicaleg.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c2cb6f0aea---31600802734.pdfIn PDF document text
    • http://www.sbawerribee.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160a868d171e85---gomenolepusujizelol.pdfIn PDF document text
    • https://coevent.ru/upload/files/sinafozoxexumamolijafatot.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/FevRqgeaUVY/uplcv?utm_term=word+save+in+pdfPDF link annotation

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