Malicious PDF — malware analysis report

Static analysis result for SHA-256 e1ac1cf6b45c3153…

MALICIOUS

PDF

74.8 KB Created: 2021-09-02 13:53:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-04
MD5: 88226ada949f10aa3777c642782c74fb SHA-1: 18b7a3ef7e9baf0b0487116c1d5e7cfa22f56a93 SHA-256: e1ac1cf6b45c3153cf80bb0df184aee8d7868a3965e4357bc3ebbc1e1fa55504
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm, many hosted on compromised CMS upload directories. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7770

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 http://krajinar.cz/soubory/files/xadexutipekavumefejomi.pdf In PDF document text
    • http://donateagift.eu/userfiles/file/mezin.pdfIn PDF document text
    • https://www.ideakliniksisli.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c5b244c76ba---leronag.pdfIn PDF document text
    • https://healthcareadvisorsgroup.com/wp-content/plugins/super-forms/uploads/php/files/el752347o7kmho4p9mbs1df5t6/76117461749.pdfIn PDF document text
    • http://www.niziointerior.pl/upload/file/burisukokufavokojojon.pdfIn PDF document text
    • http://ats-dz.com/userfiles/file/24874991423.pdfIn PDF document text
    • http://yer-krasnodar.ru/ckfinder/userfiles/files/70904111424.pdfIn PDF document text
    • http://hmconcretemixingplant.ru/d/files/xetiwowudutebosavaxovo.pdfIn PDF document text
    • https://rajatotogroup2.com/contents//files/keriwelukitekiz.pdfIn PDF document text
    • https://opsclown.it/ckfinder/userfiles/files/82884782377.pdfIn PDF document text
    • https://derey.nl/app/webroot/files/userfiles/files/pilazisubozuxedud.pdfIn PDF document text
    • https://anukulagrotech.com/userfiles/file/miwemazezotogavamapedur.pdfIn PDF document text
    • https://kayakbranson.com/wp-content/plugins/formcraft/file-upload/server/content/files/16105ee34b4345---87059719172.pdfIn PDF document text
    • https://www.sblending.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1609d380972c49---tazeboxobaxiniwukaguw.pdfIn PDF document text
    • http://www.vivelamusica.es/wp-content/plugins/formcraft/file-upload/server/content/files/160e3dbc34452b---solevi.pdfIn PDF document text
    • https://www.saltriot.com/wp-content/plugins/super-forms/uploads/php/files/31ce4dca4ba18a0a305ffa112c627973/21280943164.pdfIn PDF document text
    • https://www.northamericatalk.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d46333e4cc0---kuwuriv.pdfIn PDF document text
    • http://kiddeefire.com/media/userfiles/files/megogovukedufebir.pdfIn PDF document text
    • http://svatba-emi.com/uploads/pages/files/38947225377.pdfIn PDF document text
    • http://www.dnevi-sekretarjev.eu/wp-content/plugins/formcraft/file-upload/server/content/files/16091e6525c211---sinarevodux.pdfIn PDF document text
    • http://eau-msu.ru/ckfinder/userfiles/files/rupakimozakevelixokujit.pdfIn PDF document text
    • https://www.asahinadigital.com/wp-content/plugins/super-forms/uploads/php/files/1qeuuohdiigh49970jhhsp2td1/55139482710.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/LPIa9PGmDLg/uplcv?utm_term=after+book+3+online+pdfPDF link annotation

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