Malicious PDF — malware analysis report

Static analysis result for SHA-256 53ddfbff1346cbb8…

MALICIOUS

PDF

112.0 KB Created: 2021-06-25 18:11:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-27
MD5: cce9b990a220bbd8e6a661755ffbda6d SHA-1: 0e00a1e958587270a8333754fe6d3f4d401b2d29 SHA-256: 53ddfbff1346cbb8341d5ecbffe225cff2f632d078d3f4e77ba239fcfa61fbe5
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links, many of which point to websites hosted on compromised Content Management Systems (CMS) or utilize disposable hosting. The ClamAV detection as 'Pdf.Phishing.Trojan' further indicates malicious intent. The primary attack pattern observed is the use of a link farm to redirect users to potentially malicious sites, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.3958

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 https://pypconsultores.mx/userfiles/file/bonir.pdf In PDF document text
    • http://lab4050.com/upload/editor/file/97081453897.pdfIn PDF document text
    • http://imagespa.mx/wp-content/plugins/formcraft/file-upload/server/content/files/1608fc4312767f---84875915913.pdfIn PDF document text
    • http://travelshops.pl/userfiles/file/wawoteb.pdfIn PDF document text
    • http://www.gainerwindows.ca/wp-content/plugins/super-forms/uploads/php/files/ptesggbfd85dkltkv5irlavba2/70784348400.pdfIn PDF document text
    • https://dsodrecital.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bab36cd7aac---lejozezalawela.pdfIn PDF document text
    • http://flightshop.jp/images/blog//file/21650274954.pdfIn PDF document text
    • https://admonks.ru/wp-content/plugins/super-forms/uploads/php/files/b7db8358c32849021428d40c5f5ab083/korunipudigonemelojamug.pdfIn PDF document text
    • http://www.highlandmetals.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1608e6c964aea4---rosanijebanolilera.pdfIn PDF document text
    • https://dongytueduc.com/wp-content/plugins/super-forms/uploads/php/files/h46nfk99ff87359tefh9oqamfg/10170182738.pdfIn PDF document text
    • https://www.darrellstuckey.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f7aeba10c6---nimiwatalekalafifa.pdfIn PDF document text
    • http://brette-animation.com/userfiles/file/titovojodagufavutuxiru.pdfIn PDF document text
    • http://aitrans.cn/UploadFile/file/F1202106091147114155.pdfIn PDF document text
    • https://bomberosdenavarra.com/userfiles_nexo/files/pomumeb.pdfIn PDF document text
    • https://jaunimodienos.lt/wp-content/plugins/super-forms/uploads/php/files/0p7tkn8klpi987n6g5kf8qfe88/76777233546.pdfIn PDF document text
    • http://www.zopfitravel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608e82dc96b58---vogebijade.pdfIn PDF document text
    • https://jennysbooks.com/wp-content/plugins/super-forms/uploads/php/files/d89517bf4d40ebe3af089f44c1aa413c/purufasuvinetawuvisiwosix.pdfIn PDF document text
    • https://plumcourse.com/wp-content/plugins/super-forms/uploads/php/files/74bc9090981d2501425e874ce3e8d557/14830281914.pdfIn PDF document text
    • http://dabien.co.kr/wp-content/plugins/formcraft/file-upload/server/content/files/1608c5e9356434---nimupuk.pdfIn PDF document text
    • http://mosjob.ru/images/file/bemamavepokoponalig.pdfIn PDF document text
    • https://htddienstverlening.nl/userfiles/file/jirive.pdfIn PDF document text
    • http://chanakol.com/ckfinder/userfiles/files/36028389423.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/S30rS-6n6vg/uplcv?utm_term=comprehension+for+class+3+icsePDF link annotation
    • http://kioskcondoweb.wpengine.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606fbdbc9bda6---zanonigijijet.pdfIn PDF document text

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