Malicious PDF — malware analysis report

Static analysis result for SHA-256 45ae78cc11a6b99f…

MALICIOUS

PDF

48.0 KB Created: 2021-09-28 15:04:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 67ef3dc72df4b366856d810d72b72bfb SHA-1: 9d2725fb47fb8addf7c412bd41ea6582297b06cb SHA-256: 45ae78cc11a6b99faf8422de4424af47ec48ba34af1f3486fae99a5b9a9af1fe
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains numerous links to external websites, many of which are hosted on compromised WordPress upload directories or disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. The embedded URLs suggest an attempt to redirect the user to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6441

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://archism.ru/uplcv?utm_term=rate+of+change+of+volume+of+a+cylinder+with+respect+to+radius PDF link annotation
    • https://www.cfo-search.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613521b2aff81---tabunuwigisubasiloko.pdfIn PDF document text
    • http://emilygrilltogo.com/uploads/files/vuxixuxogine.pdfIn PDF document text
    • https://kodeac.com/wp-content/plugins/super-forms/uploads/php/files/7kopklicmuktkgkqrthb47utaa/sazimezo.pdfIn PDF document text
    • https://takipbizde.com/calisma2/files/uploads/kurexijujiwexotojapes.pdfIn PDF document text
    • http://mdtrend.hu/files/file/92846547413.pdfIn PDF document text
    • https://oklogistic.lv/upload/file/sipugerawewuforuxonudakon.pdfIn PDF document text
    • https://osikovo.eu/webroot/img/content/files/70984424874.pdfIn PDF document text
    • https://aljazeerahpetroleum.ae/userfiles/files/28903063585.pdfIn PDF document text
    • https://phm.vn/upload/files/zufate.pdfIn PDF document text
    • http://ghibms.com/userfiles/files/60280023518.pdfIn PDF document text
    • http://dellalontra.it/userfiles/files/kanetilizuxupimasuzare.pdfIn PDF document text
    • http://www.driftime.ee/wp-content/plugins/formcraft/file-upload/server/content/files/161501cb01cfa7---kekadi.pdfIn PDF document text
    • https://www.euroservicemilano.it/wp-content/plugins/formcraft/file-upload/server/content/files/16152d66da7e6a---54264225981.pdfIn PDF document text
    • http://frutapac.es/ckfinder/userfiles/files/72527569253.pdfIn PDF document text
    • http://tauroconsulting.pl/userfiles/file/fepamazilif.pdfIn PDF document text
    • https://martensmgt.com/business_school/uploads/file/texapono.pdfIn PDF document text
    • http://matkinhantai.com/luutru/files/lizumaxipusol.pdfIn PDF document text
    • https://rugsinc.in/UserFiles/files/bebatosafogutiba.pdfIn PDF document text
    • https://samsungdvmklima.com/upload/ckfinder/files/92011397827.pdfIn PDF document text
    • https://www.champagne-auge-dascier.com/ckfinder/userfiles/files/riliwatanop.pdfIn PDF document text
    • https://flylights.pl/wp-content/plugins/super-forms/uploads/php/files/06pnae0t117cc727hmqgkljjfh/42027876342.pdfIn PDF document text
    • http://nieruchomosci-swidnica.pl/userfiles/file/7985755044.pdfIn PDF document text
    • http://longvu.vn/Images_upload/files/tobukuf.pdfIn PDF document text
    • http://elite-nails.pl/Upload/file/36098195871.pdfIn PDF document text
    • http://gearonlaw.net/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/wizafusivimalerijuviv.pdfIn PDF document text