Malicious PDF — malware analysis report

Static analysis result for SHA-256 cd6b260107fff588…

MALICIOUS

PDF

55.4 KB Created: 2021-09-17 10:25:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: af13cceb0fd33c38b9c19f8941ae4501 SHA-1: 9d9444a106f6a027e1edab061a28e481470985ab SHA-256: cd6b260107fff58824f4b280b33b5157ec6d51368ba21d65d0ac0729e2788101
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains numerous embedded URLs that point to various domains, many of which appear to be compromised or disposable hosting. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' and 'PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM' indicate a pattern of using these links for SEO manipulation or to host malicious content. The ClamAV detection and ML classifier further support its malicious nature, likely as a phishing or malware distribution vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6436

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://cructi.ru/uplcv?utm_term=the+power+of+your+subconscious+mind+pdf+book+download PDF link annotation
    • http://www.jfac.kr/ckfinder/userfiles/files/5585312277.pdfIn PDF document text
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/16131160b2072a---juzaxifovopunukujubem.pdfIn PDF document text
    • http://ttccid.com/userfiles/files/kiwisuxivadixegubafeved.pdfIn PDF document text
    • http://cbstav.cz/file/telewuvegagome.pdfIn PDF document text
    • http://esteticka-stomatologie.cz/files/content/file/78099432789.pdfIn PDF document text
    • http://alacarte-design.de/userfiles/file/wesefuxumodufuwovagakamax.pdfIn PDF document text
    • http://entone.es/wp-content/plugins/super-forms/uploads/php/files/3f89f1fc5339cc6478365b0f47457006/566850970.pdfIn PDF document text
    • http://conomiya.com/images/uploadedimages/file/75364750592.pdfIn PDF document text
    • https://smoothnomad.com/wp-content/plugins/super-forms/uploads/php/files/jqn3ti9u8pb8aq8bd2pohatou0/somovojejivawoxinula.pdfIn PDF document text
    • http://studioagronomoserragiotto.eu/userfiles/files/62151440930.pdfIn PDF document text
    • http://acmemask.com/upfiles/editor/files/rusomod.pdfIn PDF document text
    • http://bangkokmagnetwire.com/ecodev_test/image_system/files/15005049805.pdfIn PDF document text
    • http://live-lessons.net/lcj/web/uploads/assets/file/81471307589.pdfIn PDF document text
    • https://shibbirs.com/media/files/mesaxen.pdfIn PDF document text
    • https://aymexco.eu/ckfinder/userfiles/files/23131443008.pdfIn PDF document text
    • https://groupburuemas1.com/contents/files/29724884157.pdfIn PDF document text
    • http://www.iqubz.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613c8a6895601---49839466797.pdfIn PDF document text
    • http://w-w.cn/isee/pfm/cms/uploadfile/fck/file/vudapavusolol.pdfIn PDF document text
    • http://xn--80ackbssfuieecff0e8c.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/lkp4tu7ur1cjn3mvi9fg8nguc6/ziwokogebovin.pdfIn PDF document text
    • https://hgindustrial.eu/userfiles/files/32406236481.pdfIn PDF document text
    • http://cukrarska-vyroba.cz/UserFiles/File/91007717367.pdfIn PDF document text
    • http://rmgoals.com/userfiles/files/jalefe.pdfIn PDF document text
    • http://gocchame.vn/app/webroot/img/uploads/files/46646528216.pdfIn PDF document text
    • http://studionegro.net/userfiles/files/dajabeguxedevofeg.pdfIn PDF document text
    • https://satellietgroep.nl/userfiles/files/5337787336.pdfIn PDF document text

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