Malicious PDF — malware analysis report

Static analysis result for SHA-256 4f2c9f6e6df4596f…

MALICIOUS

PDF

73.4 KB Created: 2021-08-10 06:20:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 82317bad4e0179e86c1c314dbf0b098e SHA-1: 9956e9e7169e4864f3c6edcdeba82787d82c16fa SHA-256: 4f2c9f6e6df4596fb83659e2316ea3489adfafcab32393671ff4432af037de20
154 Risk Score

Malware Insights

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

The PDF contains a link farm directing to multiple compromised CMS upload directories, indicating a likely phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. The file's structure and numerous external links point towards a tactic of overwhelming the user with choices, potentially to obscure the true malicious destination.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7537

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://dentherapia.hu/files/file/xozidomifipepujuwej.pdf In PDF document text
    • http://gwardiajuvenia.pl/zdjecia/fck/file/77957764900.pdfIn PDF document text
    • https://www.ayersworthglen.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b028e080fd5---xiwunutotefim.pdfIn PDF document text
    • http://kirks-pool.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a3e1a1c466f---kekipore.pdfIn PDF document text
    • http://elcampoeco.org/FCKeditor/file/18703580649.pdfIn PDF document text
    • http://philippinesroadshow.com/wp-content/plugins/super-forms/uploads/php/files/b898f1d10c3401ba7c84ca676d83b401/tipubipuvapesadawinu.pdfIn PDF document text
    • http://lovelyspa.net/ckfinder/userfiles/files/57706384021.pdfIn PDF document text
    • http://suamayin.biz/userfiles/file/rumufemafikesujaletunisi.pdfIn PDF document text
    • http://kperrylaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/fadefudikaxusatug.pdfIn PDF document text
    • http://svx.su/ffile/file/30882516866.pdfIn PDF document text
    • http://sten.kr/club/data/userfiles/file/20210728040718.pdfIn PDF document text
    • http://www.whirlpool-beachcomber.at/wp-content/plugins/formcraft/file-upload/server/content/files/16102fbaddb160---lisusu.pdfIn PDF document text
    • https://youstore21.com/wp-content/plugins/super-forms/uploads/php/files/a4f5e0de9b7b94c74a5422f507c6240b/28018633450.pdfIn PDF document text
    • http://gamax-motor.cz/data/dokumenty/xupepiwurakorilijum.pdfIn PDF document text
    • http://wongkungfu.ca/clients/f/f5/f5c316b966f29b3192b3e9e3c5714b3c/File/28817840631.pdfIn PDF document text
    • http://solarhomepage.ch/fckeditor/editor/images/file/napujag.pdfIn PDF document text
    • http://on-video.com/movies/movie_data/file/jigokali.pdfIn PDF document text
    • https://noks.cz/wp-content/plugins/formcraft/file-upload/server/content/files/1607b9b83e55cc---62908591864.pdfIn PDF document text
    • http://4grd.com/cmsimages/file/dugaxexokumirepolul.pdfIn PDF document text
    • https://www.hotel-palladium.gr/wp-content/plugins/super-forms/uploads/php/files/pphmi2opdskskuoppljmebl3gd/80523997567.pdfIn PDF document text
    • http://larrysiegellaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/mitaxu.pdfIn PDF document text
    • https://esperanzadeavila.com/fotos/file/67333525641.pdfIn PDF document text
    • https://doitsolutions.co/wp-content/plugins/super-forms/uploads/php/files/16401b5643393bfbadc2d89b80b2d7d4/luvukifadifeb.pdfIn PDF document text
    • https://pikewallis.no/wp-content/plugins/formcraft/file-upload/server/content/files/16086f382e7422---19965971082.pdfIn PDF document text
    • https://www.havanasalsa-dance-tours.com/wp-content/plugins/super-forms/uploads/php/files/f76747bfce27753efaa1ba33f2c4a153/26872534649.pdfIn PDF document text
    • https://www.sidertest.it/wp-content/plugins/formcraft/file-upload/server/content/files/1606cc21de6b28---57889195360.pdfIn PDF document text
    • http://coalcreekcentenary.com/clients/5/52/52f735e63eff8706e1a2a73a20aef632/File/64072891936.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3vuEKuznOb8/uplcv?utm_term=spanish+language+books+for+beginners+pdfPDF link annotation

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