Malicious PDF — malware analysis report

Static analysis result for SHA-256 57204e6c6bc4b3a5…

MALICIOUS

PDF

66.6 KB Created: 2021-09-10 00:02:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-02
MD5: 6b62601f05930a4a096e60b78b8b866e SHA-1: 6e801ef9e13c873526f3f096c6b1199a28d5efcc SHA-256: 57204e6c6bc4b3a5f3f2adba85c54e8160f7f3b00503d97953d9e9b108df2bb3
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, many of which are part of a link farm hosted on disposable domains, suggesting an attempt to redirect users to malicious content. The presence of PDF_SEO_DISPOSABLE_LINK_FARM heuristic further supports this, indicating a strategy to obscure the true destination of the links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7267

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://oniceh.ru/uplcv?utm_term=how+to+get+robux+in+2021 PDF link annotation
    • http://wsm.hk/images/files/mopulotid.pdfIn PDF document text
    • https://newsale.linyn.mobi/upload/ckeditor/pages/files/rakagidatubotexoditodu.pdfIn PDF document text
    • https://www.kadeavenue.com/wp-content/plugins/super-forms/uploads/php/files/1fe2fdd224d52bbac94cf6df9d80787c/sizajufopimepek.pdfIn PDF document text
    • http://kimdaiphatsteel.com/Images_upload/files/wugozo.pdfIn PDF document text
    • http://nakloboucku.cz/uploaded/file/13464618115.pdfIn PDF document text
    • http://nhasachnguyenvancu.com/Images_upload/files/xosaseboxe.pdfIn PDF document text
    • http://getem.pl/files/file/kulilitemememidokuk.pdfIn PDF document text
    • http://bobiniauto.com/userfiles/file/xaripavo.pdfIn PDF document text
    • https://deltarents.com/upload/ckfinder/files/21211179674.pdfIn PDF document text
    • https://beeshark.ro/app/webroot/files/userfiles/files/vajarabubip.pdfIn PDF document text
    • https://trucraftsmanship.com/wp-content/plugins/formcraft/file-upload/server/content/files/161339c5b458ee---41976862579.pdfIn PDF document text
    • http://lechioutdoor.com/userfiles/file/14452134285.pdfIn PDF document text
    • http://ylgems.com/file_media/file_image/file/95464510160.pdfIn PDF document text
    • http://mutitar.com/user_img/files/vejibadivoz.pdfIn PDF document text
    • https://kolkataangikar.org/ckfinder/userfiles/files/zumusegatiselafebijoru.pdfIn PDF document text
    • http://longarmquiltacademy.net/fckeditor/userfiles/file/62731899441.pdfIn PDF document text
    • http://www.ciesol.es/ckfinder/userfiles/files/10158701198.pdfIn PDF document text
    • http://siamintertrade.com/file_media/file_image/file/63188444541.pdfIn PDF document text
    • https://senesi-sklad.cz/userfiles/file/jirozuxejufazitejo.pdfIn PDF document text
    • http://coutleelaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/lekudovuganibolama.pdfIn PDF document text
    • http://brilliantsolarpaneling.com/userfiles/file/71320360445.pdfIn PDF document text
    • http://africanhairbraidingsalon.com/userfiles/file/rasomak.pdfIn PDF document text