Malicious PDF — malware analysis report

Static analysis result for SHA-256 963235771f0b2a1e…

MALICIOUS

PDF

51.5 KB Created: 2021-07-01 15:05:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-29
MD5: 9c606f0e2bf6c91e234f1ad6892b70dc SHA-1: e05117850d53dc55ec1ce8b0e03b41d0ec8d4c7d SHA-256: 963235771f0b2a1e9023c5f0b7bdcedee31514888fa66f0afbe247aa28cdd979
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous links pointing to compromised WordPress sites, identified by heuristics like 'PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM' and 'PDF_SEO_DISPOSABLE_LINK_FARM'. The ClamAV detection and ML classifier also flagged this PDF as malicious, specifically as a phishing trojan. The embedded URLs suggest a phishing or malware distribution campaign, leveraging compromised infrastructure to host malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6901

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://www.mercedesbenzofaustinservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609f870cdc560---vibexezazoma.pdf In PDF document text
    • https://law.myvzl.com/wp-content/plugins/super-forms/uploads/php/files/7nb53hjlh271ccb6obc9jogs6b/45747082159.pdfIn PDF document text
    • http://ainut.fi/userfiles/file/55697635079.pdfIn PDF document text
    • http://zulaikhatextile.com/userfiles/files/11003703798.pdfIn PDF document text
    • http://ar-intl.net/wp-content/plugins/super-forms/uploads/php/files/k4jjg9lltpt92pnd9rpb65rnp5/jelomateb.pdfIn PDF document text
    • https://kuechentreff-schmid.de/wp-content/plugins/super-forms/uploads/php/files/25m7ft8373g8js4bv1vv0qa9bt/sitewinabiwivasedin.pdfIn PDF document text
    • https://stcatherine.ac.ug/wp-content/plugins/formcraft/file-upload/server/content/files/160868df82643d---92136386970.pdfIn PDF document text
    • https://www.duffylighting.com/wp-content/plugins/super-forms/uploads/php/files/324f5df633e1743b5748cfbeeb1ffc5b/33616578631.pdfIn PDF document text
    • http://www.expo-hotel.com/english/wp-content/plugins/formcraft/file-upload/server/content/files/1606ce98ae1265---95285138626.pdfIn PDF document text
    • https://k9-warrior.com/wp-content/plugins/super-forms/uploads/php/files/2on30n5cff9i2gss6rh3p5bs2u/ridokemegatadojozomes.pdfIn PDF document text
    • https://stratasphere.online/userfiles/file/56552793064.pdfIn PDF document text
    • http://www.mvdisposal.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607dfb75e22f8---dagux.pdfIn PDF document text
    • http://amandamaitland.com/images/file/tifonegixaxemovim.pdfIn PDF document text
    • http://neodev.space/wp-content/plugins/formcraft/file-upload/server/content/files/16090ac357a09a---kimusudavoxejukod.pdfIn PDF document text
    • https://jetzterstrecht.hamburg/wp-content/plugins/super-forms/uploads/php/files/g3cj2mcqs90uv1r0gq85btid86/44287844944.pdfIn PDF document text
    • http://mouaumfb.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607043bc7c44d---luxezofula.pdfIn PDF document text
    • https://mrmobilewebsite.agency/wp-content/plugins/super-forms/uploads/php/files/d5ca0cd3b2c7046f55159ca24b256b74/nisuxagegijito.pdfIn PDF document text
    • http://clearlakesd.org/wp-content/plugins/formcraft/file-upload/server/content/files/160828e5ee7ec5---ribosadarixigopa.pdfIn PDF document text
    • http://adveotec.com/img/file/vekodigo.pdfIn PDF document text
    • http://deborahmayerlawoffices.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/87733783696.pdfIn PDF document text
    • https://www.chinacimctrailer.com/wp-content/plugins/super-forms/uploads/php/files/cf2ac8a7af2800a9845effb11d34bf0d/20094604325.pdfIn PDF document text
    • https://celovechurch.org/wp-content/plugins/super-forms/uploads/php/files/1593b7e53dca56182d34577969c950ad/60727061468.pdfIn PDF document text
    • http://winteringlawoffice.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/musovatijufovaxag.pdfIn PDF document text
    • https://www.gml.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607fbef6b5b62---18203838263.pdfIn PDF document text
    • https://toskov-yordanov.com/userfiles/file/24045508022.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3vuEKuznOb8/uplcv?utm_term=forbes+mill+steakhousePDF link annotation

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