Malicious PDF — malware analysis report

Static analysis result for SHA-256 5578103adbde6a4a…

MALICIOUS

PDF

65.2 KB Created: 2021-09-11 17:47:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 301e7fe1de2f3737e854954257153e2d SHA-1: 043cf58126dbd0ccfb321d5749750182736cb576 SHA-256: 5578103adbde6a4a7a4757406818669a76b4b9359c1ce835aa230b7a7ca271ba
72 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample contains embedded JavaScript, a common technique for executing malicious code within PDFs. The PDF_SEO_DISPOSABLE_LINK_FARM heuristic indicates a high number of distinct hosts and links, suggesting a link farm designed to obscure the ultimate destination. The embedded JavaScript likely redirects the user to one of these external URLs, which are often used for phishing or to download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5089

Heuristics 4

  • 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://www.costaverde.it/wp-content/plugins/formcraft/file-upload/server/content/files/1613c503404ffc---75853068273.pdf In PDF document text
    • http://xuanfe.com/uploads/FCKeditor/file/23917219953.pdfIn PDF document text
    • http://albarossa.jp/js/upload/files/62244109316.pdfIn PDF document text
    • https://bizimpin.com/calisma2/files/uploads/sifamuzusaxit.pdfIn PDF document text
    • https://svetplus.com/userfiles/files/71315511926.pdfIn PDF document text
    • https://grandplaza.bg/uploads/assets/file/26787747401.pdfIn PDF document text
    • http://petra-koparki.pl/Upload/file/wugeber.pdfIn PDF document text
    • https://wupaojichangjia.com/d/files/dafagosatukagofutebefije.pdfIn PDF document text
    • https://www.davidcosz.de/wp-content/plugins/super-forms/uploads/php/files/4s9gu8kitf0n50n6pq0h63bs63/fudirotabakiwonebi.pdfIn PDF document text
    • http://grandwatergatehotel.com/upfile_hotel/files/56875626236.pdfIn PDF document text
    • https://navliecky.net/userfiles/file/jaridedov.pdfIn PDF document text
    • http://parikshitconstruction.com/uploads/sawavogufit.pdfIn PDF document text
    • http://tcihk.com/userfiles/lenim.pdfIn PDF document text
    • http://pusancard.com/userData/board/file/gakepurobulige.pdfIn PDF document text
    • https://davidfoleyinc.com/userfiles/file/23759123532.pdfIn PDF document text
    • https://kcss.hu/korosi/userfiles/file/laxubiduvoxofizemidasoxa.pdfIn PDF document text
    • http://preiss.at/upload_files/files/xavizonolononutinir.pdfIn PDF document text
    • http://grimastone.ru/files/7066370182.pdfIn PDF document text
    • https://mudraconsultancy.com/uploads/files/lumamokinufipof.pdfIn PDF document text
    • https://vili-al.com/uploads/wysiwyg/files/26845627147.pdfIn PDF document text
    • http://xn--o39a91gvwm83kbsn.com/FileData/ckfinder/files/20210906_5FF6AE8DFA8CB6C5.pdfIn PDF document text
    • https://sgicorp.com/userfiles/files/31118150795.pdfIn PDF document text
    • http://tecniagua.es/uploads/ckfinder/files/45041177850.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3vuEKuznOb8/uplcv?utm_term=android+sex+games+listPDF link annotation