Malicious PDF — malware analysis report

Static analysis result for SHA-256 585d2e64c0905561…

MALICIOUS

PDF

62.3 KB Created: 2021-06-28 18:57:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: c3a669881d1667427879da6a00a82d1c SHA-1: 1ac043207b91a96b6d3e4ca990031caa7b4962df SHA-256: 585d2e64c0905561ea04d6e18c8e3e1aaa473516fc4be4fd428638195755a267
132 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript, which is a common technique for executing malicious code. It also features a link farm pointing to multiple compromised WordPress sites, suggesting an attempt to obscure the final malicious destination. The ClamAV detection as 'Pdf.Phishing.Trojan' further supports the malicious nature of this file.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.4855

Heuristics 6

  • 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.
  • 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://kes-stv.ru/wp-content/plugins/super-forms/uploads/php/files/75ec31329a3252062cd6a7ce6605f30a/rukamuruxekaloxes.pdf In PDF document text
    • https://securityguardsupply.org/php/uploads/file/kivirudozorumufepubafi.pdfIn PDF document text
    • http://www.dadosefatos.net.br/wp-content/plugins/formcraft/file-upload/server/content/files/1609ee31f4c4c8---rabakonusizubu.pdfIn PDF document text
    • http://www.fotografoeventimilano.com/wp-content/plugins/formcraft/file-upload/server/content/files/16098f94ff300c---43020228106.pdfIn PDF document text
    • https://aashianarealty.com/file/51838099400.pdfIn PDF document text
    • http://chouchoudauphongongtay.com/upload/ck/files/96077853286.pdfIn PDF document text
    • http://itineraire-consulting.com/ckfinder/userfiles/files/gepitebilijazorubajaperod.pdfIn PDF document text
    • http://socialbomjesus.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/160bfeedf908e9---58909444608.pdfIn PDF document text
    • http://www.kevinbrooks.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160c57b271f532---74438357395.pdfIn PDF document text
    • https://adbetelparaguay.com/wp-content/plugins/super-forms/uploads/php/files/5ba47733cd28bc78bab8a2fdb349eca9/verefeku.pdfIn PDF document text
    • http://prime-standard.com/piceditor/file/xevulezugaxorupovivenowa.pdfIn PDF document text
    • http://chayka-svg.ru/files/94769839255.pdfIn PDF document text
    • https://www.spoton.pet/wp-content/plugins/super-forms/uploads/php/files/hm8oo3ho560k0a05i30qi1kf82/7288884428.pdfIn PDF document text
    • https://yziact.fr/wp-content/plugins/super-forms/uploads/php/files/joer53dvcfmb1u88hupfko7mp4/jisipugonet.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b3219c36240---56602538979.pdfIn PDF document text
    • https://smilepath.com.au/wp-content/plugins/super-forms/uploads/php/files/63760ebdc7bab451608830125b5b298b/dulafam.pdfIn PDF document text
    • http://carszana.com/image/upload/File/nijaretugokesigekaseki.pdfIn PDF document text
    • http://arserwood.com/js/fckeditor/editor/filemanager/connectors/php/connector.php/upfiles/file/210502103044414710og9w1g.pdfIn PDF document text
    • https://www.northamericatalk.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b4033f711f7---83177630589.pdfIn PDF document text
    • http://ned.ru/uploads/files/foruvanix.pdfIn PDF document text
    • http://bascobrunswick.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16082199a51368---zalikigazewed.pdfIn PDF document text
    • https://noihoithanhtuan.com/media/ftp/file/99879214725.pdfIn PDF document text
    • http://www.eflox.net/wp-content/plugins/formcraft/file-upload/server/content/files/1609b6bb0e1779---xomewolexizezagiduluroder.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/GLLx1DTH0VQ/uplcv?utm_term=one+punch+man+webcomic+137PDF link annotation

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