Malicious PDF — malware analysis report

Static analysis result for SHA-256 456d93f6709f3f4e…

MALICIOUS

PDF

52.6 KB Created: 2021-09-18 02:19:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 6ad29243e169d6ebf47eeb81f9aab2b2 SHA-1: 4d430d29ad44e752ca91201e680f0b1203e25619 SHA-256: 456d93f6709f3f4e94b1f5f34bcb01c6ca1555c78d8273a6091d9e2a9798bc62
162 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file contains embedded JavaScript and numerous external links, many of which point to compromised WordPress sites or disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or SEO poisoning to redirect users to malicious content. The embedded JavaScript, while not fully analyzed due to obfuscation, is a common technique for executing malicious actions within PDFs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8793

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 http://easyhypermarket.com/userfiles/file/95721997631.pdf In PDF document text
    • http://myatkinsonfamily.com/userimages/22355426501.pdfIn PDF document text
    • https://www.cdscabling.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16133ecc24107b---jofutu.pdfIn PDF document text
    • http://ardeche.proximeo.com/ckfinder/userfiles/files/vebonamivubomugadasosuti.pdfIn PDF document text
    • http://tsutae-f.com/js/upload/files/55823624257.pdfIn PDF document text
    • http://dealershop.es/userfiles/file/rojodororopaxuleruzi.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/16136815e7b768---bazupafukebivavuridezis.pdfIn PDF document text
    • https://yenhuy.vn/upload/files/kikuzuregabususorejojexi.pdfIn PDF document text
    • https://www.mppoa.cloudlinesystems.com/assets/ckfinder/userfiles/files/40243077494.pdfIn PDF document text
    • http://studiofapas.it/userfiles/files/21627989954.pdfIn PDF document text
    • https://kfmaccounting.com/webroot/img/content/files/60909722953.pdfIn PDF document text
    • http://angel-conference.org/upload_fck/file/2021-9-12/20210912151628216408.pdfIn PDF document text
    • http://buyyoutubesubscribers.com/ci/userfiles/files/kebunefedup.pdfIn PDF document text
    • http://cityclick.it/userfiles/files/dinulabasigubamuwasipi.pdfIn PDF document text
    • http://discoveryenglish.org/wp-content/plugins/formcraft/file-upload/server/content/files/1614452587c3c7---ruvol.pdfIn PDF document text
    • http://ng-sons.com/userfiles/file/mirige.pdfIn PDF document text
    • https://www.karenlovelee.com/wp-content/plugins/formcraft/file-upload/server/content/files/16141d2d20e159---kedet.pdfIn PDF document text
    • https://108pizza.pl/uploads/userfiles/files/wixinomum.pdfIn PDF document text
    • http://bargiel.com.pl/ckfinder/userfiles/files/madak.pdfIn PDF document text
    • http://kimhoatra.vn/upload/fckimagesfile/burivasizipumalevedaj.pdfIn PDF document text
    • http://inspirationallabels.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1613d458e74706---92082026700.pdfIn PDF document text
    • https://markiza-trade.ru/admin/ckfinder/userfiles/files/xaduripitaxomabog.pdfIn PDF document text
    • https://leuphuotcamap.com/uploads/image/files/zabewufekokofewij.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/Om9ozkHLxGw/uplcv?utm_term=slow+down+game+speed+androidPDF link annotation

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