Malicious PDF — malware analysis report

Static analysis result for SHA-256 3a7984a46e40f44b…

MALICIOUS

PDF

79.0 KB Created: 2021-08-09 09:29:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 13f47ae5327f5466b9e62de7948f8aa0 SHA-1: fd2c4f3abb2ee5a19865179a6678b60f250fd7dd SHA-256: 3a7984a46e40f44b39bccafc16bf3a6550cbf4d666c44efd0b10e6fa0b2fc8d4
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a phishing or trojan payload. It contains a link farm pointing to compromised WordPress sites, likely intended to distribute further malicious content. The presence of multiple external URIs and the compromised CMS upload link heuristic strongly suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9159

Heuristics 5

  • 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.
  • 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://coretry.ru/uplcv?utm_term=karcher+720+mx+vue+eclat%C3%A9e PDF link annotation
    • https://lerong.vn/wp-content/plugins/super-forms/uploads/php/files/21e31809fbb1030c2db291d9ccaee504/46432111498.pdfIn PDF document text
    • http://perilatomsk.ru/ckfinder/userfiles/files/nafuderazebasonutavipu.pdfIn PDF document text
    • http://standrewsparishhighschoolclassof1964.com/clients/70428/File/69845155507.pdfIn PDF document text
    • http://premiumresourcing.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bf23d5a5de5---54553938371.pdfIn PDF document text
    • https://investainternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/16089726526dc1---4523798786.pdfIn PDF document text
    • http://www.etoiles-recrutement.com/wp-content/plugins/formcraft/file-upload/server/content/files/16110522ab464a---72890881143.pdfIn PDF document text
    • https://www.lipfish.no/wp-content/plugins/formcraft/file-upload/server/content/files/1608dc04041880---50463925071.pdfIn PDF document text
    • http://sunnysolutions.it/uploads/assets/file/desimabewaramutubelakexas.pdfIn PDF document text
    • http://dgxzz.com/uploadfile/file/44247346204.pdfIn PDF document text
    • http://hopkinshigh62.com/clients/7/77/7764523e397120ad9b09b1da26998858/File/55951706405.pdfIn PDF document text
    • http://mamitobe.ru/files/file/ramididez.pdfIn PDF document text
    • http://gtlitalia.com/userfiles/files/92271531273.pdfIn PDF document text
    • http://lookupagency.es/wp-content/plugins/formcraft/file-upload/server/content/files/1608164a3713fd---rejogajipavu.pdfIn PDF document text
    • http://ipceurope.eu/assets/file/44963507375.pdfIn PDF document text
    • https://ontime-taxi.kg/wp-content/plugins/super-forms/uploads/php/files/622125a37dcae98e285df94f62f641f2/8779808681.pdfIn PDF document text
    • https://tucsonhomewindowtint.com/wp-content/plugins/super-forms/uploads/php/files/79950450dcc06b5c7b32c9a6db749a89/bizagimerugorata.pdfIn PDF document text
    • http://ahsaipu.com/v15/Upload/file/20215718131443.pdfIn PDF document text
    • https://bettenbaehren.de/wp-content/plugins/formcraft/file-upload/server/content/files/160c5164e4b72d---zogame.pdfIn PDF document text
    • http://popmetre.com/news/files/94730658059.pdfIn PDF document text
    • https://santaclara.com/wysiwygfiles/file/fovimapa.pdfIn PDF document text
    • http://www.rkcomdesignservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a98e21f29c5---26251198365.pdfIn PDF document text
    • http://alnadaoil.com/userfiles/file/99941595201.pdfIn PDF document text
    • https://laneopx.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b35e8651c96---liruwexawi.pdfIn PDF document text
    • http://freemansphotography.com/wp-content/plugins/formcraft/file-upload/server/content/files/160892819b6ab2---77229582512.pdfIn PDF document text

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