Malicious PDF — malware analysis report

Static analysis result for SHA-256 4a9b8d509ad15d24…

MALICIOUS

PDF

64.0 KB Created: 2021-08-15 03:54:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 461e2b58f97f7a53b9b918200ba56e02 SHA-1: c0d4a604d310e8cbf7e8d482425aacbbedfeb9e2 SHA-256: 4a9b8d509ad15d24a9096e508251cee0f894e858f60b41d4af09931b1ee77344
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links, many pointing to compromised WordPress upload directories, suggesting a phishing or redirection scheme. ClamAV detection and ML classification confirm its malicious nature. While no scripts were explicitly extracted, the PDF structure and embedded links are indicative of a phishing attempt, likely delivered as an attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9593

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://feriaesotericadeatocha.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a8f27989f36---tizimebinu.pdf In PDF document text
    • http://fittbike.hu/files/file/sosavebawavatonabig.pdfIn PDF document text
    • http://gostium.com/wp-content/plugins/formcraft/file-upload/server/content/files/161140005c8787---28814402770.pdfIn PDF document text
    • http://meruzhankhachatryan.com/app/webroot/files/file/63608840605.pdfIn PDF document text
    • https://bilalyapidekorasyon.com/userfiles/file/91045867963.pdfIn PDF document text
    • http://www.argentum.com/wp-content/plugins/super-forms/uploads/php/files/0qclhrs2gs43ofqh0c18hpm7g8/33775673327.pdfIn PDF document text
    • http://altaprecision.com/userfiles/file/rifaxat.pdfIn PDF document text
    • https://malimbe.africa/wp-content/plugins/super-forms/uploads/php/files/8e269f5fe624d0a37342d32da51b9fa7/68481903982.pdfIn PDF document text
    • https://www.grandeprairie.org/wp-content/plugins/formcraft/file-upload/server/content/files/1607bd6b522137---luzejitegulotijawogal.pdfIn PDF document text
    • https://www.bocamvigliesrooms.com/wp-content/plugins/super-forms/uploads/php/files/4c7984c99cfccf5a17e19d1ed5b664ad/2648413025.pdfIn PDF document text
    • http://www.a-fairys-choice.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a0f919210ae---66328594574.pdfIn PDF document text
    • https://regenerativetherapyforpain.com/wp-content/plugins/super-forms/uploads/php/files/7bc03f210f48c77bdfe8cfdcad9bd045/38927990095.pdfIn PDF document text
    • https://n95america.com/wp-content/plugins/super-forms/uploads/php/files/a2a2e0c58a350fa71fa4c3442511a589/kugorozikokodumozowafa.pdfIn PDF document text
    • http://bundoreh.com/fckeditor/files/file/gedebididelasuvat.pdfIn PDF document text
    • https://commonwealthsportsawards.com/userfiles/file/65812788733.pdfIn PDF document text
    • http://chocolatycakes.com/wp-content/plugins/formcraft/file-upload/server/content/files/160fb5f323976a---45983827608.pdfIn PDF document text
    • https://arzhosting.com/calisma2/files/uploads/71043851705.pdfIn PDF document text
    • https://www.cr-sdc.org/wp-content/plugins/super-forms/uploads/php/files/a98d9b0340bff58823ff6e94aba6968e/65794539617.pdfIn PDF document text
    • https://teenvolunteerhouston.org/wp-content/plugins/super-forms/uploads/php/files/b91062b9d2778361e06b8f11b9c62b94/12537023544.pdfIn PDF document text
    • http://interel-rus.ru/test/sites/default/files/file/64062174922.pdfIn PDF document text
    • https://elitstroycraft.ru/source/file/18732324531.pdfIn PDF document text
    • https://art4you.sk/editor_uploads/system/files/66440728913.pdfIn PDF document text
    • https://www.formwork.co.uk/wp-content/plugins/super-forms/uploads/php/files/t7pa3hcfc3j59b0t1rfuc0289l/tikefofibikaminazorolun.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/Om9ozkHLxGw/uplcv?utm_term=how+to+play+france+hoi4+multiplayerPDF link annotation

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