Malicious PDF — malware analysis report

Static analysis result for SHA-256 a8254d870040e261…

MALICIOUS

PDF

62.3 KB Created: 2021-09-02 10:18:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: c6ee55d1da9efc5d6a363baa538739e9 SHA-1: dcbf24698b3a5efab4bbcf0e38d50ccd59b2403a SHA-256: a8254d870040e261dcddacea1fff6fda3178c03db8773c86dd2e5de2dfe1bc18
154 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a high-confidence ML classifier and ClamAV detection. It functions as a link farm, with numerous embedded URLs pointing to compromised or disposable domains. These links are likely intended to lead users to phishing sites or download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9893

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 http://wyadonline.com/userfiles/file/62673660577.pdf In PDF document text
    • http://yatros.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1607a8e94b278d---79701483910.pdfIn PDF document text
    • http://wolfpackbasketballacademy.com/content_docs/66861381160.pdfIn PDF document text
    • http://www.sunarpazarlama.com/wp-content/plugins/super-forms/uploads/php/files/gemla3k2ktvt954a90uo11mrj2/nurimaruvinu.pdfIn PDF document text
    • https://www.birdandwildlifeteam.com/wp-content/plugins/formcraft/file-upload/server/content/files/160834ff0a78db---74988742548.pdfIn PDF document text
    • https://t4g.nasscomfoundation.org/wp-content/plugins/super-forms/uploads/php/files/pbm2do6qfd78flk4anb7oer1c5/55250875585.pdfIn PDF document text
    • http://dragonera.cn/admin/userfiles/file/66654149873.pdfIn PDF document text
    • https://kurek-rowery.pl/user_pict/file/445652796.pdfIn PDF document text
    • https://dollarplus98.com/images/upload/files/nijav.pdfIn PDF document text
    • http://randalljroutson.com/clients/44711/File/malojijezuxesunenor.pdfIn PDF document text
    • http://aksaaydinlatma.com/img/editor/image/file/keresixawowavip.pdfIn PDF document text
    • https://humantouchtranslations.com/wp-content/plugins/formcraft/file-upload/server/content/files/1/1607ac023720a4---sinorulawuz.pdfIn PDF document text
    • http://au-coeur-du-temps.com/userfiles/file/75514614086.pdfIn PDF document text
    • http://xn--939a66v0zjo3bcvdmrp.com/data/ckfinder/files/wozepomibuxelumed.pdfIn PDF document text
    • https://senzedigicraft.com/wp-content/plugins/super-forms/uploads/php/files/c38fa9efaa9619f937cf88aab0fb5c0a/1167016113.pdfIn PDF document text
    • http://paramountswimwear.com/userfiles/files/68579608961.pdfIn PDF document text
    • https://bestofbucerias.com/upload/file/bupisuzem.pdfIn PDF document text
    • http://www.abcklima.hu//data/editorfile/23644192176.pdfIn PDF document text
    • http://tuanayapim.com/rsm/files/tuwujakefovuvovo.pdfIn PDF document text
    • http://luisacortesearchitetto.it/userfiles/files/76597305449.pdfIn PDF document text
    • http://labradory.pl/file/64021953667.pdfIn PDF document text
    • https://prosperitas.be/data/assets/file/sazuxumufimovogol.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/A3Ryygt5BCM/uplcv?utm_term=verse+god+has+not+given+us+a+spirit+of+fearPDF link annotation

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