Malicious PDF — malware analysis report

Static analysis result for SHA-256 619f77383cf59e6f…

MALICIOUS

PDF

48.0 KB Created: 2021-09-18 18:42:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: c75bbeaa43f917e22a1e52da68d18ade SHA-1: 0375ee3d801eb48f394daa52a91a1386611e50ee SHA-256: 619f77383cf59e6f0e6de23ca93374757ac2a477210743b0f4acbda48cf1defe
162 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is a PDF containing embedded JavaScript, which is a common technique for executing malicious code. It also features numerous links, many pointing to compromised WordPress sites and disposable hosting, suggesting a link farm designed to redirect users to malicious content. The ClamAV detection and ML classifier further support its malicious nature, likely as a phishing or malware distribution lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6237

Heuristics 6

  • 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.
  • 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 http://biancoacolori.it/userfiles/files/bajus.pdf In PDF document text
    • http://geologicatoscana.eu/userfiles/files/5015168862.pdfIn PDF document text
    • http://studiotrusso.it/userfiles/files/81377865044.pdfIn PDF document text
    • https://mudateconmigo.cl/wp-content/plugins/super-forms/uploads/php/files/21d4affc835baddf952586de80921f02/ludew.pdfIn PDF document text
    • http://stfurnimart.com/file_media/file_image/file/rurijaxupejokisamedizul.pdfIn PDF document text
    • http://dep14kirov.ru/userfiles/file/82413903446.pdfIn PDF document text
    • https://djecijagarderoba.me/userfiles/file/44965432415.pdfIn PDF document text
    • http://eldorautomaticgates.com/UserFiles/file/wibidajavo.pdfIn PDF document text
    • https://essuances.com/ckfinder/userfiles/files/79511164658.pdfIn PDF document text
    • http://vankouwenenmastop.nl/UserFiles/file/55559648179.pdfIn PDF document text
    • http://www.oknookna.pl/wp-content/plugins/formcraft/file-upload/server/content/files/161368cbb601c4---wozadevujogubawozeli.pdfIn PDF document text
    • http://pkpneu.cz/userfiles/file/36329102296.pdfIn PDF document text
    • http://gapp.fr/medias/files/46792095617.pdfIn PDF document text
    • http://www.jhannahs.com/wp-content/plugins/formcraft/file-upload/server/content/files/16141924288415---13796376.pdfIn PDF document text
    • http://dreamscar.eu/userfiles/file/pefamapedatezitesupur.pdfIn PDF document text
    • https://kayakbranson.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613311cc42122---budisokudakikuf.pdfIn PDF document text
    • https://vico-inmobiliaria.com/ckfinder/userfiles/files/bubupokagitada.pdfIn PDF document text
    • http://baharemadinah.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612f08b09d542---rumetisitadekebitojo.pdfIn PDF document text
    • http://dalaichau.com/files/jipeturamabama.pdfIn PDF document text
    • http://agnieszkapawlik.com/userfiles/file/dotonotekaja.pdfIn PDF document text
    • https://verticala.ro/images/userfiles/tisoxosel.pdfIn PDF document text
    • https://cebubigsellers.com/userfiles/file/6027303439.pdfIn PDF document text
    • https://tatvan.in/userfiles/file/16261584478.pdfIn PDF document text
    • http://www.sintsprev-ms.org.br/ckfinder/userfiles/files/30972071011.pdfIn PDF document text
    • https://psihodesk.ro/ckfinder/userfiles/files/97570405650.pdfIn PDF document text
    • https://registracijakoncar.com/webroot/js/ckfinder/userfiles/files/11358651307.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1xuhb7AK25c/uplcv?utm_term=download+netzwerk+a1+pdfPDF link annotation

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