Malicious PDF — malware analysis report

Static analysis result for SHA-256 2a30a70f90847d54…

MALICIOUS

PDF

66.5 KB Created: 2021-09-15 13:22:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23
MD5: ec51cf586a65ff99c7387f72cdf80d29 SHA-1: 1aefa3aad77224ac4e47e4eeb8cf824f0492831b SHA-256: 2a30a70f90847d54f154b887c87c64f443a554d32b49dace91dcb8c9987b721d
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains numerous links pointing to other PDF documents hosted on various websites, many of which appear to be compromised CMS uploads. This structure suggests a link farm designed to obscure the ultimate destination, likely a phishing page or a malware download server. The ClamAV detection as 'Pdf.Phishing.Trojan' further supports a malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7267

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://salondebellezaanamariaromero.es/ckfinder/userfiles/files/baxamu.pdf In PDF document text
    • http://paillasse.hu/userfiles/file/11928244788.pdfIn PDF document text
    • https://vallejardin.com/wp-content/plugins/super-forms/uploads/php/files/fa9e1e39b67fb156fe1d8e28da80fb23/24994888927.pdfIn PDF document text
    • https://trichynext.com/wp-content/plugins/super-forms/uploads/php/files/30006ea7dc324c0abe21eea9b205453f/lixetozodekiworama.pdfIn PDF document text
    • https://bokaichenyu.com/upload/files/58775599446.pdfIn PDF document text
    • https://bushregenerators.info/userfiles/files/54788770985.pdfIn PDF document text
    • http://sasolution.kr/userfiles/file/43200353813.pdfIn PDF document text
    • http://faizleathergloves.com/userfiles/files/senunerejuvujutilet.pdfIn PDF document text
    • http://fioredda.com/userfiles/files/4915778809.pdfIn PDF document text
    • http://carrozzeriabosini.net/userfiles/files/bedeseber.pdfIn PDF document text
    • http://hijoin.hu/editor_up/36214771363.pdfIn PDF document text
    • http://www.agrosystem.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1613537e04bfae---joxubumebirejexofexazosa.pdfIn PDF document text
    • http://moskvaznaet.ru/upload/files/4606716985.pdfIn PDF document text
    • http://www.airportlimofortlauderdale.net/wp-content/plugins/formcraft/file-upload/server/content/files/161333051860e9---wawetupuzefufaleke.pdfIn PDF document text
    • https://phase1acoustics.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613ee1fc0e922---miziwatabuxirata.pdfIn PDF document text
    • https://gift-edu.ru/wp-content/plugins/super-forms/uploads/php/files/fa953ed88b0d297e286b3f80b8b3561a/wulumomibebokul.pdfIn PDF document text
    • https://www.potterycommercials.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1613b31af987be---gofumunuwedov.pdfIn PDF document text
    • https://www.hotelamoha.it/wp-content/plugins/formcraft/file-upload/server/content/files/1613b46c7a943e---lefugewopa.pdfIn PDF document text
    • http://www.espaciocultivarte.com/ckfinder/userfiles/files/kuxosopuligawarel.pdfIn PDF document text
    • https://mandalaconfeccao.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1612f075596442---tuzowe.pdfIn PDF document text
    • http://xyr59.com/filespath/files/20210914185212.pdfIn PDF document text
    • https://callmarkinvestments.fortunekenya.com/callmark/files/89299268704.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/LPIa9PGmDLg/uplcv?utm_term=the+chaser+short+story+pdfPDF link annotation

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