Malicious PDF — malware analysis report

Static analysis result for SHA-256 424a4fe1ad7248cd…

MALICIOUS

PDF

67.6 KB Created: 2021-05-07 15:43:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ea62e6f8355cba636f7a221c8cb0ebc1 SHA-1: d9c346b7a90c105f656524f5902e6dd5a12988b5 SHA-256: 424a4fe1ad7248cdffb16da1328c0fda30a62ea8d9f26d19680e8ffb5521d91f
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 phishing or trojan payload. It contains a link farm pointing to multiple compromised WordPress sites, likely intended to host and distribute further malicious content. The document body, though heavily obfuscated, suggests a lure related to 'Barbados passport forms renewal', aiming to trick users into clicking the provided links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7505

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://krisoc.ru/uplcv?utm_term=barbados+passport+forms+renewal
    • https://areicon.com/images/file/42931817355.pdf
    • https://akarchlight.com/wp-content/plugins/super-forms/uploads/php/files/79e576d06ffea3f33ca145ecee8f13f7/93815438123.pdf
    • http://warraichmeats.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d9553ceef0---gopemupixunalirixoligike.pdf
    • http://www.peopleoftheheath.com/wp-content/plugins/formcraft/file-upload/server/content/files/160837dc879b89---niroja.pdf
    • http://www.sensible-seeds-premium.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607798b2d5874---jitoxemaloz.pdf
    • https://www.americansummercamps.com/wp-content/plugins/formcraft/file-upload/server/content/files/16077df160408d---fipakekug.pdf
    • https://xn--64-mlcufjjaii0l.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/907b029bdbe56170760cf342ba4ad0f6/romolenuninuluduf.pdf
    • http://pocatellocampfire.com/wp-content/plugins/super-forms/uploads/php/files/4j5tkg7gkar7dgea9i7jnpqkd8/33386897681.pdf
    • https://givemeit.ru/wp-content/plugins/super-forms/uploads/php/files/52f18ca9e506787d5881e90d316ff285/sibeluful.pdf
    • http://extreamtuning.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16094a0bdc7b75---pokedeximasumadis.pdf
    • https://space1500.com/wp-content/plugins/super-forms/uploads/php/files/e788e42f255733ac238bb3c2fc0a0b38/xedonezuwafejiroxumodazes.pdf
    • http://xperion.hu/wp-content/plugins/super-forms/uploads/php/files/c9b1c2dfff432ab809af14965d0a0d2b/luviluje.pdf
    • https://www.northernillumination.com/wp-content/plugins/super-forms/uploads/php/files/3f2baa5f7a0f292f351fe95f26dae55d/vonuzepamilefunumep.pdf
    • https://www.cfo-search.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608c3c07978f3---27742042584.pdf
    • https://realestateconnect.pro/wp-content/plugins/super-forms/uploads/php/files/dfdefv6o39v4bqmtssd9hppbg0/72211030866.pdf
    • https://www.davidcosz.de/wp-content/plugins/super-forms/uploads/php/files/7en6gadi3vpg1m62bhvkjhen25/36460272953.pdf
    • https://g-ortho.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160817d737637d---19217317921.pdf
    • http://www.iso-clean.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1609048bf8a3c2---daxabefaduz.pdf

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