Malicious PDF — malware analysis report

Static analysis result for SHA-256 52aec784c06040fe…

MALICIOUS

PDF

61.2 KB Created: 2021-08-09 07:59:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-24
MD5: ca28686f33ee357fa5ce97babc736931 SHA-1: fa70c53b0bf2f6d3f0038d3782d37f9e0cc7fe80 SHA-256: 52aec784c06040feb60eb8093995e0231d22ac8fcbf67f0cacf2f629a0cf0182
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 0.8007

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://shihtzufurbabies.net/clients/d/d3/d383cf0c90cf2d2391705d5438694b4c/File/mamaginifi.pdf In PDF document text
    • https://barcelonamedicalcenter.com/files/galeria/files/57672390159.pdfIn PDF document text
    • http://visualpaint.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ce3e3d0a25a---gaferonob.pdfIn PDF document text
    • http://yomamasushitogo.com/uploads/files/99895724242.pdfIn PDF document text
    • http://www.asslar.de/downloads/8739687424.pdfIn PDF document text
    • https://asiatravel.kg/wp-content/plugins/super-forms/uploads/php/files/2217f00e937aebddf14788fcee776344/siporedubabogimapodupa.pdfIn PDF document text
    • http://euro-ex.net/images/blog//file/64986069614.pdfIn PDF document text
    • https://www.tai.gr/wp-content/plugins/formcraft/file-upload/server/content/files/160b2f3c8177fd---juriruzozimezikanuf.pdfIn PDF document text
    • https://baconbites.com/wp-content/plugins/super-forms/uploads/php/files/66rqp88fld8rg9mi4uc8s6n496/newirutik.pdfIn PDF document text
    • http://www.cerel.eu/images/wyswig_images/file/vijorotolawumoruxufip.pdfIn PDF document text
    • http://canevinclassof70.com/clients/6/6b/6b8b8ee0d314e59372afbcb75100d768/File/49695128212.pdfIn PDF document text
    • http://kraljicabih.com/wp-content/plugins/formcraft/file-upload/server/content/files/160706afaaee12---90605242543.pdfIn PDF document text
    • http://www.gradur.ba/wp-content/plugins/formcraft/file-upload/server/content/files/160a146760c57a---66506677594.pdfIn PDF document text
    • https://amatnieks.com/pictures/image/lenalurovibobuxakefazugen.pdfIn PDF document text
    • https://krossi.ru/images/content/files/22311222323.pdfIn PDF document text
    • https://www.vibrationmonitoring.asia/wp-content/plugins/formcraft/file-upload/server/content/files/1608f19ac3a11d---43104808558.pdfIn PDF document text
    • https://xn----7sbbjg7ctfs.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/f1a176b092fdd2fd8ef071d17da379f1/zesuporaravepoxidifotoju.pdfIn PDF document text
    • https://dacoma.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1608045142c80e---70748152228.pdfIn PDF document text
    • https://primax.fr/wp-content/plugins/super-forms/uploads/php/files/7ebg24mv84ps6r9beo3d1huc91/motusejeg.pdfIn PDF document text
    • http://sistarelaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/gafedugazupumepumi.pdfIn PDF document text
    • http://abnicum.com/files/file/35395944543.pdfIn PDF document text
    • https://wecareprogram.org/images/file/pusizubo.pdfIn PDF document text
    • http://castel.lu/userfiles/files/zamasiwumulekeridu.pdfIn PDF document text
    • https://zlatartopalovic.rs//files/47958779873.pdfIn PDF document text
    • http://unipell.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a1da9b7edae---37887791238.pdfIn PDF document text
    • http://umrllc.com/userfiles/files/delimopamamawivudugop.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/YTWXjIUwRh0/uplcv?utm_term=bossa+nova+guitar+tabs+pdfPDF link annotation

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