Malicious PDF — malware analysis report

Static analysis result for SHA-256 5c3bda8b567c9bab…

MALICIOUS

PDF

62.5 KB Created: 2021-08-10 05:15:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 10efc016c447bc7e2f0cef1eb158e2cc SHA-1: 7ff7b3ac1af6828e8eaa75f6401c5850483ec06b SHA-256: 5c3bda8b567c9bab4547372ae8ac83ed06702b31b4506609e2f8ff775d5fe9a7
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which point to compromised WordPress sites. The 'PDF_SEO_DISPOSABLE_LINK_FARM' and 'PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM' heuristics indicate a pattern of using these sites to host or link to malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware delivery via these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8029

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://dedywiredja.com/wp-content/plugins/formcraft/file-upload/server/content/files/161117e6b7f7c2---lomolumiriwegoruninipagom.pdf In PDF document text
    • https://www.bevillelecomte.com/ckfinder/userfiles/files/24054604744.pdfIn PDF document text
    • http://www.sandzthabapanel.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160d0aa211b409---lubawuf.pdfIn PDF document text
    • https://ljlconst.com/admin/images/file/bavigufobunodelugopavon.pdfIn PDF document text
    • http://nesthomes.in/userfiles/file/foladuxute.pdfIn PDF document text
    • https://mlmrockstars.com/ckfinder/userfiles/files/18768080622.pdfIn PDF document text
    • https://n-zvuk.ru/upload/file/dejifi.pdfIn PDF document text
    • http://eia-edu.com/userfiles/file/sujuxabagivaxazuluwo.pdfIn PDF document text
    • https://x-software.cz/data/file/32445986321.pdfIn PDF document text
    • http://www.supair-lux.hu/ckfinder/userfiles/files/87589517584.pdfIn PDF document text
    • http://firmen-bekleidung.at/userfiles/file/99539034517.pdfIn PDF document text
    • http://pocatellocampfire.com/wp-content/plugins/super-forms/uploads/php/files/r6l9g3rg2jgtvpaojvdjcvs3fv/pavazodi.pdfIn PDF document text
    • http://cofetariafraguta.ro/UserFiles/file/dopuxuw.pdfIn PDF document text
    • https://accesoriosalmayor.com/images/userfiles/file/wuxeveduzefesu.pdfIn PDF document text
    • https://pilotcenter.gr/wp-content/plugins/super-forms/uploads/php/files/q4i9tfdckr5bof4v99aggb0fbg/nowototowokutedaj.pdfIn PDF document text
    • https://www.arc-welding.co.uk/wp-content/plugins/super-forms/uploads/php/files/fklpu06t0tc5f8vtgojhp8te56/kezafebozixi.pdfIn PDF document text
    • http://skup-laptopow.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b4c81a5528f---gusanebuvosone.pdfIn PDF document text
    • https://tvmreza.tv/ckfinder/userfiles/files/temizezites.pdfIn PDF document text
    • http://lhs75.com/clients/46937/File/relozakokuxomumawetujuv.pdfIn PDF document text
    • http://gabortech.comadmin/file/ladakelunobedu.pdfIn PDF document text
    • http://marcth.pl/media/fck/file/38193189949.pdfIn PDF document text
    • https://lakecountyoralsurgery.com/wp-content/plugins/formcraft/file-upload/server/content/files/160830c4593381---21608811169.pdfIn PDF document text
    • https://glasschneider.koeln/wp-content/plugins/super-forms/uploads/php/files/1ib92iu4vv3soj5d7ms16jvcpq/fepiduve.pdfIn PDF document text
    • https://www.breastcancerfoundation.in/wp-content/plugins/super-forms/uploads/php/files/fa37ebc42519d13a88a7b50445b630ea/30154891925.pdfIn PDF document text
    • https://duext.com/wp-content/plugins/super-forms/uploads/php/files/d02206e99e4d49ab59846009da551181/55569485601.pdfIn PDF document text
    • http://badaranquehablar.com/userfiles/files/97931140485.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/GLLx1DTH0VQ/uplcv?utm_term=recovery+time+for+mcl+reconstructionPDF link annotation

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