Malicious PDF — malware analysis report

Static analysis result for SHA-256 14d23b4015aa9be0…

MALICIOUS

PDF

46.9 KB Created: 2021-09-30 16:01:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 90af80ddd7754e6a1ce2af1dbebd3c9f SHA-1: b254efd586897431a8f2eeba0a86007a3dec7a4b SHA-256: 14d23b4015aa9be0c8c300b060d45c4d9f2920808ead08f06c7ca42a9dc4da57
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains numerous embedded URLs that point to various websites, including those hosted on compromised WordPress installations. The ClamAV detection and ML classifier indicate malicious intent, likely related to phishing or malware distribution. The heuristic PDF_SEO_DISPOSABLE_LINK_FARM suggests the document is designed as a link farm on disposable hosting, with URLs like 'https://laborke.ru/uplcv?utm_term=legends+of+the+clans+pdf' being used to redirect users.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7448

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 https://laborke.ru/uplcv?utm_term=legends+of+the+clans+pdf PDF link annotation
    • https://intrastorg.com/userfiles/file/marewajejefivaxijo.pdfIn PDF document text
    • http://mcutech.net/files/mutenem.pdfIn PDF document text
    • http://www.orarestauratorisaf.it/wp-content/plugins/formcraft/file-upload/server/content/files/16148a89b00fee---26116339964.pdfIn PDF document text
    • https://rotitelor.com/contents/files/refolafubukoxagimizepurix.pdfIn PDF document text
    • http://train-in-japan.com/images/blog/file/71843896881.pdfIn PDF document text
    • http://arcdesantmarti.com/biocop/Images/images-editor/file/wopugotuwaz.pdfIn PDF document text
    • https://anup.bo/images/files/89624588575.pdfIn PDF document text
    • http://paramountswimwear.com/userfiles/files/dojabizavibifomizini.pdfIn PDF document text
    • http://xn--9w3b270a7kf.kr/ckfinder/userfiles/files/rowubadepipu.pdfIn PDF document text
    • http://www.sunarozlem.com.tr/wp-content/plugins/super-forms/uploads/php/files/0tcob4ekis9lpbk2a8jqs788n4/80358272061.pdfIn PDF document text
    • http://abwninemile.com/uploads/files/97596006751.pdfIn PDF document text
    • http://ailizia.com/userfiles/99182034436.pdfIn PDF document text
    • http://joy05.com/_UploadFile/Images/file/7361682444.pdfIn PDF document text
    • http://vonschickenconcord.com/uploads/files/tatiwuvewegexijizerobije.pdfIn PDF document text
    • http://cameralehiep.com/hinhanh_fckeditor/file/warexipanawaxuxetaf.pdfIn PDF document text
    • https://aucordechasse.fr/vosImages/74146541029.pdfIn PDF document text
    • http://www.oe.com.tw/ezadmin/ckfinder/userfiles/files/sunagoresidanimazo.pdfIn PDF document text
    • http://www.peritaonline.es/ckfinder/userfiles/files/litupoluvetifarirajino.pdfIn PDF document text
    • https://nutstudio.it/userfiles/file/fatetiwulubiwunaj.pdfIn PDF document text
    • http://capriololaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/vawafuwemabexok.pdfIn PDF document text
    • http://fortlauderdalelimorental.net/wp-content/plugins/formcraft/file-upload/server/content/files/161384f1252fd3---23699531344.pdfIn PDF document text
    • https://lotteppta.com/beta/assets/file/486211872.pdfIn PDF document text
    • http://iaestedresden.de/userfiles/file/33331110263.pdfIn PDF document text
    • https://anmoul.com/userfiles/file/towogamitoro.pdfIn PDF document text

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