Malicious PDF — malware analysis report

Static analysis result for SHA-256 5eae478653f38e63…

MALICIOUS

PDF

63.7 KB Created: 2021-08-14 09:27:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: aedb52433d7d8768d4ba94d5de9ed217 SHA-1: 038b09d8e97c6e6353483acd9e69018b67e8f670 SHA-256: 5eae478653f38e63f61b2397f1ebbdc17eb95025355499854238a1d6e18bb7a9
162 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample contains embedded JavaScript, which is a common technique for executing malicious code within PDF documents. The heuristics indicate that the PDF acts as a link farm, directing users to multiple external websites, some of which are hosted on compromised or disposable domains. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8604

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://pytextiles.com/userfiles/file/29889223800.pdf
    • http://davidhammerstein.org/userfiles/file/lojatij.pdf
    • https://aihr-iadh.org/uploads/FCK_files/file/jubegomawa.pdf
    • http://johnlillylaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/nozoxetotok.pdf
    • https://balajihighfields.in/userfiles/file/6799745802.pdf
    • http://ecohost.ru/pics/images/file/79752910447.pdf
    • http://www.belladermeestetica.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1609e18e9035e2---larijanitemewazit.pdf
    • https://fotofidelity.cz/userfiles/file/xosubofilopivadabor.pdf
    • https://adbetelparaguay.com/wp-content/plugins/super-forms/uploads/php/files/8fe3bdf07d9979f1fcf3c1fcb6dc55f0/98592543297.pdf
    • https://www.erenang.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d6ed4f319f---winuzegogarak.pdf
    • https://network-italia.it/file/gogov.pdf
    • https://www.fmworks.com.tr/wp-content/plugins/super-forms/uploads/php/files/pqri1if69cdq11qsq3v4d9v013/lodanuv.pdf
    • http://www.thegrcinstitute.org/app/webroot/js/ckfinder/userfiles/files/83930158549.pdf
    • https://mattweidnerlaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/16073bae2b5d5d---67093120680.pdf
    • https://grupo-bahia-real-estate.com/ckfinder/userfiles/files/31410078845.pdf
    • https://aarhuskortet.dk/images/file/89617953737.pdf
    • http://suachuaspa.com/upload/images-content/files/78306361619.pdf
    • https://kimtuong.vn/isc/public/files/fckupload/file/nakesufarokusekuripeve.pdf
    • https://sportsht.com/userfiles/file/xidugufojedale.pdf
    • http://idealhca.com/admin/images/file/wizufukikegozewakigeg.pdf
    • https://majubesar.info/contents//files/ravisixolaliveveludidezat.pdf
    • https://karinbentum.nl/uploads/file/nuwogakirulaxikuf.pdf
    • https://ventana-sur.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e0f8d3e6321.pdf
    • https://ckmandarin.com/uploads/medekit.pdf
    • http://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/160944f460cf18---pedovereluvig.pdf
    • http://aeronautike.com/userfiles/file/30803932089.pdf
    • https://x-leather.com/radsportfiles/file/jiwilasuvemajov.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/S30rS-6n6vg/uplcv?utm_term=esc+pericardial+guidelines

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