Malicious PDF — malware analysis report

Static analysis result for SHA-256 dd54837de13d28bc…

MALICIOUS

PDF

55.8 KB Created: 2021-09-16 15:21:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 1a0cf5c4cd85d281702db5877596c066 SHA-1: f669d026d52d92be1d036f41fa66f4e4ba77eb99 SHA-256: dd54837de13d28bc1785265a31619fcd9516f7370c4b641838c16be07bb38935
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of links pointing to various domains, many of which appear to be compromised or disposable hosting. The ClamAV detection and ML classifier indicate malicious intent, likely related to phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and link farm behavior are indicative of malicious redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6236

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://studioagm.it/userfiles/files/81558745868.pdf In PDF document text
    • http://clingac.es/d/files/91391370892.pdfIn PDF document text
    • http://oguraclutch.cn/uploadfile/files/11288659976.pdfIn PDF document text
    • https://hyundainhapkhau.vn/upload/files/ridijatoso.pdfIn PDF document text
    • http://wsp.pl/userfiles/file/rujokopudepedapinuv.pdfIn PDF document text
    • https://nstyapi.com/resimler/files/68676020546.pdfIn PDF document text
    • https://n95america.com/wp-content/plugins/super-forms/uploads/php/files/1674dbbcfc971d6ebb7070c5c2bc6b11/mabakilemupimeroze.pdfIn PDF document text
    • http://grupomarsamo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613c1b3a170ca---45877255851.pdfIn PDF document text
    • https://papiratisk.cz/soubory/59635976003.pdfIn PDF document text
    • http://exoticland.bg/upload/files/files/31945612745.pdfIn PDF document text
    • http://lukinserv.hu/file/nagonozu.pdfIn PDF document text
    • https://eltechma.com/zdjecia/fck/file/woxoseverabuteji.pdfIn PDF document text
    • http://americansemitruckparts.com/d/files/voboxat.pdfIn PDF document text
    • https://zaindu.drogomedia.com/files/galeria/files/17971596456.pdfIn PDF document text
    • http://weforyou.it/userfiles/files/garalijaxamalovo.pdfIn PDF document text
    • http://www.lauricedale.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16130709bb197a---bimovedujumexefozopesegik.pdfIn PDF document text
    • http://bulk-supplies.com/userfiles/file/nikulij.pdfIn PDF document text
    • http://www.tsssport.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613b061951f04---kijaninaxibinego.pdfIn PDF document text
    • https://chataigne-cevennes.fr/imgs/files/besigufalubewaniwamaxes.pdfIn PDF document text
    • http://www.detskaoptika.cz/ckfinder/userfiles/files/33607519208.pdfIn PDF document text
    • http://hiro-seiko.com/upload/files/wilumufoxivavonobemedekix.pdfIn PDF document text
    • http://enjoyisagenix.com/ckfinder/userfiles/files/kalopodi.pdfIn PDF document text
    • http://ff-engineering.com/userfiles/files/24111082584.pdfIn PDF document text
    • http://annabarons.com/files/files/18935293978.pdfIn PDF document text
    • https://k-newsletter.com/ckupload/files/miximewijivofedozum.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/cv9VXjIrmdE/uplcv?utm_term=super+mario+advance+2+gameshark+codesPDF link annotation

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