Malicious PDF — malware analysis report

Static analysis result for SHA-256 3eff3554189bf56a…

MALICIOUS

PDF

55.8 KB Created: 2021-08-21 12:22:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 36bf3db5fdf3f4700f7388ca0a1145de SHA-1: 6707f55973bb8b4895fd83d727b2c893c58ba7c2 SHA-256: 3eff3554189bf56a33ea5f8eba31885fe70b85859bd246467dff3a35976e5ca8
202 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF contains embedded JavaScript and a large number of external URIs, many of which point to compromised WordPress sites or disposable hosting. The heuristic 'SE_LOLBIN_RUN_COMMAND' suggests the document text itself may contain commands or references to executable content. The ClamAV detection and ML classifier strongly indicate malicious intent, likely to redirect users to phishing or malware download sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8894

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • LOLBin token sequence in document text high SE_LOLBIN_RUN_COMMAND
    Extracted document text contains a Windows script/execution tool name (PowerShell, mshta, cmd, rundll32, regsvr32, …) within 220 characters of a dangerous flag, command verb, or URL. This is a visible 'run this' instruction in HTML/PDF/RTF lure bodies, or — in macro-laden Office files — the macro's own string-pool entries appearing adjacent in extracted text.
  • 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://pixomot.ru/uplcv?utm_term=how+to+play+pokemon+ultra+violet+on+iphone PDF link annotation
    • http://charmingcurls.se/upload/file/fidew.pdfIn PDF document text
    • http://due.pt/js/ckfinder/userfiles/files/8036592579.pdfIn PDF document text
    • http://nuyewpilot.academy/wp-content/plugins/super-forms/uploads/php/files/4cddde655e29e9a9b28db06716636a4f/86732092785.pdfIn macro / runtime command snippet
    • http://xnucleus.com/members//member_images/files/39578960752.pdfIn PDF document text
    • http://www.communityheroesproject.org/wp-content/plugins/formcraft/file-upload/server/content/files/160b212bfadabe---37908479561.pdfIn PDF document text
    • https://simovi.mx/wp-content/plugins/formcraft/file-upload/server/content/files/160c91f5f56c85---59200979762.pdfIn PDF document text
    • http://www.nandomoraes.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1608e40ba1e97f---67770800640.pdfIn PDF document text
    • http://donaldnathanlaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/gamidekakofunujexagen.pdfIn PDF document text
    • https://mariellatriolo.it/public/file/69600964380.pdfIn PDF document text
    • http://www.radioemka.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a76876b0454---pamajumavoraba.pdfIn PDF document text
    • https://afriqueitnews.com/wp-content/plugins/super-forms/uploads/php/files/7c8de05a1a8ed67ae94edbee6ef488ed/kegudobapedowolona.pdfIn PDF document text
    • https://amartzon.store/wp-content/plugins/super-forms/uploads/php/files/275b7608238f32568b9075e388df4e28/favinobilasewar.pdfIn PDF document text
    • http://exactblue.com/wp-content/plugins/formcraft/file-upload/server/content/files/160719bd43d7ec---nukilidipifelinogajigepa.pdfIn PDF document text
    • http://www.whirlpool-beachcomber.at/wp-content/plugins/formcraft/file-upload/server/content/files/160d38f8e904fc---sigazoxepikizapibibigabox.pdfIn PDF document text
    • https://nutritie-metabolism-sanatate.ro/app/webroot/files/userfiles/files/13420262389.pdfIn PDF document text
    • https://onhimalayas.com/ckfinder/userfiles/files/62564050719.pdfIn PDF document text
    • https://nhaban24h.com.vn/wp-content/plugins/super-forms/uploads/php/files/oefv48tvks4b4flfafmv983l3p/95178894877.pdfIn PDF document text
    • https://www.medicalart.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160829cdcbb722---24931225534.pdfIn PDF document text
    • http://nadiadsa.org/userfiles/file/panenejajufekadukonat.pdfIn PDF document text
    • http://tznjl.com/userfiles/files/77448414886.pdfIn PDF document text
    • https://fl-forever.com/upfiles/editor/files/1582514786.pdfIn PDF document text
    • http://lumieretvie.com/userfiles/file/lifiputabaxobetojezevij.pdfIn PDF document text
    • https://ventana-sur.com/wp-content/plugins/formcraft/file-upload/server/content/files/161120bcb68d37.pdfIn PDF document text
    • https://dispomydeal.com/wp-content/plugins/super-forms/uploads/php/files/ca67141b2ee286e35fa8b4a3597f2772/nufewixinelebidexawinapug.pdfIn PDF document text
    • http://agrocare.hu/ckfinder/userfiles/files/dalamomifanabutigiga.pdfIn PDF document text
    • http://due.pt/js/ckfinder/useIn macro / runtime command snippet