Malicious PDF — malware analysis report

Static analysis result for SHA-256 5af455fcd849bb5b…

MALICIOUS

PDF

61.1 KB Created: 2021-09-05 21:55:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 12edbbfed3dd857a817bbd0aafd221b4 SHA-1: 2c80a34ba852322e51d0eb3ffeb52886e8cd0341 SHA-256: 5af455fcd849bb5b8b95ee4cbc1a29cc48defee7517041141f5a855b99674287
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 contains numerous external URIs, many pointing to compromised WordPress upload directories, suggesting a link farm designed to redirect users to malicious content. The presence of external URIs and the nature of the heuristics indicate a phishing or malware distribution attempt, likely initiated via spearphishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6435

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://queure.ru/uplcv?utm_term=sankalpam+for+pooja+in+telugu+pdf PDF link annotation
    • http://www.commandinglife.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607adb2a0b55f---18329414519.pdfIn PDF document text
    • http://afghansolar.com/userfiles/file/85198005515.pdfIn PDF document text
    • https://sgdivorcelawyers.com/wp-content/plugins/super-forms/uploads/php/files/02f88bcf2d02d28fde18e069d2243535/38624251790.pdfIn PDF document text
    • https://www.engltg.com/wp-content/plugins/super-forms/uploads/php/files/fb23a4ed8e886525cea05d7e4cfc7307/27543489577.pdfIn PDF document text
    • http://www.jhannahs.com/wp-content/plugins/formcraft/file-upload/server/content/files/16092bfaf73dce---43207987146.pdfIn PDF document text
    • http://murphysbeads.com/clients/54316/File/86919132548.pdfIn PDF document text
    • http://www.gleason.com.au/application/third_party/ckfinder/userfiles/files/36639629136.pdfIn PDF document text
    • http://www.davidwoodpersonnel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609231e0e64b7---75505654357.pdfIn PDF document text
    • https://maturana.cl/upload/file/44308218891.pdfIn PDF document text
    • https://alhurwallpaper.com/Files/files/12994983990.pdfIn PDF document text
    • http://xn--aknmedical-yub.com/uploads/file/fobugazofabozun.pdfIn PDF document text
    • http://qbcar.ru/ckfinder/userfiles/files/dikuwofutano.pdfIn PDF document text
    • https://massagetheory.ca/wp-content/plugins/super-forms/uploads/php/files/ed9048eb2838dd8f6a1e9c70b7c4ddcc/28784983190.pdfIn PDF document text
    • http://inlikeflintlogistics.com/wp-content/plugins/formcraft/file-upload/server/content/files/16078ddba4c6c5---35021699011.pdfIn PDF document text
    • http://conblocmanado.com/pics/file/kunelorojodunidiz.pdfIn PDF document text
    • https://petala.gr/userfiles/file/71328569839.pdfIn PDF document text
    • http://101-games.ru/images/uploads/files/23203531008.pdfIn PDF document text
    • https://imotrading.com/images/userfiles/nedebifizik.pdfIn PDF document text
    • https://datatech-int.com/userfiles/file/xofijemof.pdfIn PDF document text
    • https://dezsredstvompx.ru/wp-content/plugins/super-forms/uploads/php/files/bef50fed357e23a9718f75386e0dc969/tawoloduzakunilebif.pdfIn PDF document text
    • http://kraljicabih.com/wp-content/plugins/formcraft/file-upload/server/content/files/16078a3009193c---fuwirubarexuxor.pdfIn PDF document text
    • https://baconbites.com/wp-content/plugins/super-forms/uploads/php/files/df4e9p6qjiibsq9ur21ptqsok0/matamage.pdfIn PDF document text

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