Malicious PDF — malware analysis report

Static analysis result for SHA-256 c33e8a2f7de52602…

MALICIOUS

PDF

55.6 KB Created: 2021-09-08 02:17:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-25
MD5: cb5b5c62b6346936068abbafa1ea721c SHA-1: e66215bfa3d2ad6561d559d9a216474499e13888 SHA-256: c33e8a2f7de52602068616d4a26dfc3ad3a5fd8ee545dc36aafaa1ca9da18686
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

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 0.6099

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://kingtonkatsu.com/uploads/files/dopuritenujopimox.pdf In PDF document text
    • http://nd-58.ru/wp-content/plugins/super-forms/uploads/php/files/6fc0629864849adac82a34fa1deae913/69701480424.pdfIn PDF document text
    • https://www.saltriot.com/wp-content/plugins/super-forms/uploads/php/files/aa7293762fd8282a10e124ab8dd51656/wewefalapuzezore.pdfIn PDF document text
    • http://tbm-mova.by/images_from_html_editor/file/1822942990.pdfIn PDF document text
    • http://scard.vn/app/webroot/uploads/files/kitavudebaxuzenoduzetes.pdfIn PDF document text
    • https://www.ediliziaindustriale.com/wp-content/plugins/formcraft/file-upload/server/content/files/16085920ca8c61---57193543816.pdfIn PDF document text
    • http://hockjoohin.com/admin/uploads/file/wokewatisu.pdfIn PDF document text
    • http://pressvaluation.net/FCKeditor/editor/filemanager/connectors/userfiles/file/selakodonebi.pdfIn PDF document text
    • http://se-ty.ru/uploads/userfiles/file/5132835138.pdfIn PDF document text
    • http://zerosquareonline.com/file/45252609797.pdfIn PDF document text
    • https://secolink.sk/userfiles/file/23514709849.pdfIn PDF document text
    • http://akicgiyim.com/userfiles/file/14282681015.pdfIn PDF document text
    • https://hotelritariccione.it/wp-content/plugins/formcraft/file-upload/server/content/files/160f36c827302f---97408635695.pdfIn PDF document text
    • https://fond.ru/userfiles/file/13737329708.pdfIn PDF document text
    • https://art-lamps-rali.eu/files/file/44438071773.pdfIn PDF document text
    • https://xn--1--8kcai1ck2bs.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/7ca3367b9bc45d3106a03bce4fb6433c/76791810857.pdfIn PDF document text
    • http://fuli-capital.com/userfiles/file/domadefasez.pdfIn PDF document text
    • http://matchonusa.com/uploads/files/fobefule.pdfIn PDF document text
    • http://eszixv.hu/ckfinder/userfiles/files/dazejudawuzafaxepave.pdfIn PDF document text
    • http://thegibbsfamilyreunion.com/clients/d/d9/d929505c7faf6263097cc97620c39d65/File/4949666886.pdfIn PDF document text
    • http://schubert-hh.de/image/file/9630493862.pdfIn PDF document text
    • https://bizdrive.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1/16089eb6918765---vudisipotiwisatas.pdfIn PDF document text
    • http://duancanhotot.com/upload/files/31654854849.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/GLLx1DTH0VQ/uplcv?utm_term=elementos+linguisticos+semantica+pdfPDF link annotation

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