Malicious PDF — malware analysis report

Static analysis result for SHA-256 70c86aa9361379e5…

MALICIOUS

PDF

63.8 KB Created: 2021-09-05 21:35:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: e2e9bd0a1a2eb0979e5faf920497831a SHA-1: 44c4df63026f5fab03544fc15a4171cddcbca38e SHA-256: 70c86aa9361379e5f1cc291ddf8bd5527fcf1eeeabb7b0c2a2e13e89a0614329
162 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript, a common technique for executing malicious code within documents. It also features a link farm pointing to multiple distinct hosts, some of which are hosted on compromised WordPress sites, suggesting an attempt to obscure the final destination or leverage trusted domains. The ClamAV detection and ML classifier further support its malicious nature, likely as a phishing or malware delivery mechanism.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5460

Heuristics 6

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://duproject.com/uploadEditor/files/30411126951.pdf In PDF document text
    • http://aarogyamedico.com/userfiles/file/59489782168.pdfIn PDF document text
    • http://eldmsh1.ru/js/ckfinder/userfiles/files/vejewejomenipimalowomidi.pdfIn PDF document text
    • http://nhanvietgroup.com/demo/xay-dung-tnx/upload/files/99597452468.pdfIn PDF document text
    • https://chocoinmobiliario.com/wp-content/plugins/super-forms/uploads/php/files/551b0ae567b1ab6db59b86725e99e71e/rodezanubojukula.pdfIn PDF document text
    • https://wendi101.com/userfiles/file/95064318266.pdfIn PDF document text
    • https://northstarexecutivesearch.com/wp-content/plugins/super-forms/uploads/php/files/8240e6cba207b6c33bc847021da0204e/46778233403.pdfIn PDF document text
    • http://thermcom.cz/userfiles/file/jajavi.pdfIn PDF document text
    • https://sanaspinler.com/calisma2/files/uploads/zawetanef.pdfIn PDF document text
    • http://hidropro.hu/upload/xaporor.pdfIn PDF document text
    • https://reflexlighting.com/wp-content/plugins/super-forms/uploads/php/files/8a9f263f39d061a09054fe165cabdb99/notixojirisug.pdfIn PDF document text
    • http://dkkarsin.pl/img/upload/files/finawarikorexizutapago.pdfIn PDF document text
    • https://nikken-engineer.jp/export/sd205/www/jp/r/e/gmoserver/8/6/sd0748886/nikken-engineer.jp/fckeditor/upload/file/kibasarulenasutuvebevume.pdfIn PDF document text
    • http://artospace.com/pics/file/96795292239.pdfIn PDF document text
    • https://www.bocamvigliesrooms.com/wp-content/plugins/super-forms/uploads/php/files/a13b4fcebde574d9e984465637b81edb/fufis.pdfIn PDF document text
    • https://guruamardaspublicschool.com/userfiles/files/51641435616.pdfIn PDF document text
    • http://ttmplus.com/userfiles/files/mexuvikajubedegozoti.pdfIn PDF document text
    • http://www.christinemartin.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16116b2d7e555f---95633232439.pdfIn PDF document text
    • http://chinhsuasolieu.com/media/files/71061049121.pdfIn PDF document text
    • http://cjcounsel.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/wenorawonikurawetuw.pdfIn PDF document text
    • http://sireny.net/share/files/wujevukoxomuleketali.pdfIn PDF document text
    • http://trlgpc.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/94798693510.pdfIn PDF document text
    • http://thehawthornnyc.com/wp-content/plugins/formcraft/file-upload/server/content/files/160846e2cb56f8---85941262801.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/LPIa9PGmDLg/uplcv?utm_term=freakishly+effective+pdfPDF link annotation
    • http://kioskcondoweb.wpengine.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e76ff3cf23c---97980267680.pdfIn PDF document text

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