Malicious PDF — malware analysis report

Static analysis result for SHA-256 4eaf75c4105fc0c8…

MALICIOUS

PDF

62.5 KB Created: 2021-06-30 14:10:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: 64c946dc418dcae2833148fb640125ec SHA-1: 23c56a8ae314317843c39ede6970633641067bfc SHA-256: 4eaf75c4105fc0c8ec68d6785d964a8576bd3e0667cf4c18fc9f089a0e22ff41
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It functions as a link farm, containing numerous URLs pointing to compromised CMS upload storage, likely intended to redirect users to phishing or malware sites. The presence of multiple distinct hosts and the use of 'utm_term' parameters suggest an attempt to obscure the final destination and potentially leverage SEO tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6855

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 http://serendipityorlando.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a46bf2bd2c9---gujamesabino.pdf In PDF document text
    • https://popa.com.br/wp-content/plugins/super-forms/uploads/php/files/1521c4684bb0b291341bfec55d267255/37992113683.pdfIn PDF document text
    • https://futuresbuilder.net/dayafter/uploadimages/newsimages/file/xorola.pdfIn PDF document text
    • http://parentini.it/userfiles/files/84714577875.pdfIn PDF document text
    • https://izharfoster.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607378d7ad479---43829345829.pdfIn PDF document text
    • https://www.medicalart.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1608c9d65a88f8---25994921059.pdfIn PDF document text
    • http://seashoresilverlabradors.com/clients/4/48/482fd9669fb3260065120a60ccac5e48/File/jomeliziwebapebanepezesi.pdfIn PDF document text
    • https://artsketch.ru/wp-content/plugins/super-forms/uploads/php/files/88e9148f684ccd2688496ac992f92a9b/varevuv.pdfIn PDF document text
    • http://matstravel.ru/userfiles/file/mukojelidukoniwizu.pdfIn PDF document text
    • http://ghhs1968.com/clients/5/57/5762190d0a265df614d1f295a7060a42/File/bovoduxefina.pdfIn PDF document text
    • http://trainternational.in/wp-content/plugins/formcraft/file-upload/server/content/files/1608b482768d19---10153436278.pdfIn PDF document text
    • https://www.aironface.com/wp-content/plugins/super-forms/uploads/php/files/3fc02422d427cb78cae90a0b23c7183b/2306035621.pdfIn PDF document text
    • https://aneri12.cz/res/file/xosusipomuluterekem.pdfIn PDF document text
    • https://www.euroservicemilano.it/wp-content/plugins/formcraft/file-upload/server/content/files/160b8293fc47ec---43434483069.pdfIn PDF document text
    • https://www.asahinafunnels.com/wp-content/plugins/super-forms/uploads/php/files/o7maqpa8bpjs4t9gs85sg7b766/mozawedodube.pdfIn PDF document text
    • http://studiopol.it/userfiles/files/rogigotidevigotidebop.pdfIn PDF document text
    • https://allmassage.net/upload/file/20210507112711.pdfIn PDF document text
    • http://amdind.com/userfiles/file/37148653080.pdfIn PDF document text
    • http://www.webtony.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160b4fe5316f75---25364161388.pdfIn PDF document text
    • http://www.moteco.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16070cef13204d---polesapowubusanogatelera.pdfIn PDF document text
    • https://ms01bet.net/contents//files/xefaxuzelopaposokisuk.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/DOqCt-cVA4I/uplcv?utm_term=morphea+skin+picturesPDF link annotation

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