Malicious PDF — malware analysis report

Static analysis result for SHA-256 cf446072c01bb17e…

MALICIOUS

PDF

55.4 KB Created: 2021-09-07 11:50:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 1f616dcb80d54381b355e76e367794c1 SHA-1: d6237b893f66a28ddc9bd6cef96d661fb9ca7a1a SHA-256: cf446072c01bb17e4c47b673641dab05593031f4bf7cff4199a933215e152f7d
132 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file contains embedded JavaScript and numerous external URIs, many of which point to compromised CMS upload storage or disposable hosting, indicating a link farm designed to redirect users. The ClamAV detection as 'Pdf.Phishing.Trojan' strongly suggests a malicious intent, likely phishing or malware delivery through these redirects.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.4951

Heuristics 6

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://golf-tout-terrain.com/publish/page/file/95102854289.pdf In PDF document text
    • https://na-nule.ru/wp-content/plugins/super-forms/uploads/php/files/6v6l2eami84nl9m163eoh41rb0/gatipix.pdfIn PDF document text
    • http://zoltysnieg.pl/pliki_wyswig/files/51221420268.pdfIn PDF document text
    • https://leicht-spb.ru/wp-content/plugins/super-forms/uploads/php/files/a1e184733051c776f514d90b025cf8f6/26470996883.pdfIn PDF document text
    • https://kamedia.vn/data/file/99236655155.pdfIn PDF document text
    • https://esportenerd.com/app/webroot/ckfinder/userfiles/files/wiloxejabudolutumuvun.pdfIn PDF document text
    • http://adance0112.com/upfile/editor/file/fizenadugula.pdfIn PDF document text
    • http://longbienco.com/js/ckfinder/userfiles/files/zumip.pdfIn PDF document text
    • http://anjilh.com/uploadfile/file///2021042823355542.pdfIn PDF document text
    • https://bazab.ru/ckfinder/userfiles/files/pozixesep.pdfIn PDF document text
    • http://sunnysidehigh65.com/clients/d/d0/d00d1ad1640c45b888f5e58ac216a5d1/File/vavavasokowefalopotuv.pdfIn PDF document text
    • http://chi-kara.net/Upload/files/mibikununujar.pdfIn PDF document text
    • http://www.europesolidaire.eu/userfiles/files/zimezejasupawu.pdfIn PDF document text
    • http://www.enredmail.com/templates/files/idCliente_/file/virexojasuliwojoxulo.pdfIn PDF document text
    • http://cherryontop.pl/upload/fotki/file/gezogixurutami.pdfIn PDF document text
    • http://www.risingstars.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160c6de3db23a2---pefij.pdfIn PDF document text
    • http://qlinairnv.be/userfiles/file/70398978667.pdfIn PDF document text
    • http://bestforfishing.com/wp-content/plugins/super-forms/uploads/php/files/08bb4d77d97583243f6befa6e1d8db7a/nabajil.pdfIn PDF document text
    • http://naasschoolofmotoring.ie/fckeditor/userfiles/file/gejukima.pdfIn PDF document text
    • https://popcouncilinstitute.org/wp-content/plugins/super-forms/uploads/php/files/feca35bc2a043c1ed58ef94ce9e1f7b0/286286811.pdfIn PDF document text
    • https://realwebguys.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ed453f8c441---lejawunerix.pdfIn PDF document text
    • http://www.mondzorgvesa-voorschoten.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1607f9fdb6d025---30624508637.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/S30rS-6n6vg/uplcv?utm_term=mcrae%27s+orthopaedic+trauma+and+emergency+fracture+management+3rd+edition+pdfPDF link annotation

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