Malicious PDF — malware analysis report

Static analysis result for SHA-256 54fe15ba85d56c8f…

MALICIOUS

PDF

47.0 KB Created: 2021-09-24 03:32:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: da8dc3b5827a2f056c8ba1558e9df0b7 SHA-1: feb452bef2435f04d629a09b20d7e525922fcc9a SHA-256: 54fe15ba85d56c8fd7c42ea998724ca05019bb5b590e44ee997e97c776ba370c
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 User Execution: Malicious File

The sample was detected as malicious by ML classifiers and ClamAV, specifically flagged as a phishing trojan. It contains numerous embedded URLs, many pointing to PDF files hosted on various domains, suggesting a link farm designed to obscure the ultimate destination or distribute further malicious content. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' strongly indicates a malicious intent to redirect users through multiple domains.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7355

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 http://cctechlaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/bilimajizi.pdf In PDF document text
    • http://dom-2000.ru/ckfinder/userfiles/files/pawifokapi.pdfIn PDF document text
    • http://ckud.handysociality.com/upload/files/vajokafovowat.pdfIn PDF document text
    • http://anindecor.pl/files/file/fisozifaw.pdfIn PDF document text
    • https://silky.ae/images/bulk_images/files/fitemurovuxo.pdfIn PDF document text
    • https://www.aukuras.org/ckfinder/userfiles/files/82231969567.pdfIn PDF document text
    • http://maivietnamesecotati.com/uploads/files/47307995242.pdfIn PDF document text
    • http://tao-oita.com/admin/upload_filesfile/garutepa.pdfIn PDF document text
    • https://vmgeducationtrust.org/home/vmgedu/public_html/public/userfiles/file/18549153539.pdfIn PDF document text
    • https://angel-juicer.com/FileData/ckfinder/files/20210924_D2D3AE3300C69B1B.pdfIn PDF document text
    • http://artin-intranet.com/ckupload/files/powipunelonuxifuvo.pdfIn PDF document text
    • http://finara-v.com/file_media/file_image/file/vesemapozipafotalefo.pdfIn PDF document text
    • http://sanruou.com/app/webroot/uploads/files/59103745648.pdfIn PDF document text
    • http://alnadaoil.com/userfiles/file/xonodavidezavogulukubiki.pdfIn PDF document text
    • http://nicenpos.com/userData/board/file/widudufunu.pdfIn PDF document text
    • http://fred-robin.com/ckfinder/userfiles/files/78161770042.pdfIn PDF document text
    • https://husvagnsexpo.se/wp-content/plugins/formcraft/file-upload/server/content/files/16149b1d36bff9---kotivagibuladepajek.pdfIn PDF document text
    • http://52fotki.ru/ckfinder/userfiles/files/lupirajapujuxawumoz.pdfIn PDF document text
    • https://turasmobilya.com/img/editor/image/file/856482449.pdfIn PDF document text
    • http://akicgiyim.com/userfiles/file/rozapejogovufupagifoge.pdfIn PDF document text
    • http://babyindex.nl/images/uploads/2524894338.pdfIn PDF document text
    • https://yauspeshen.com/ckfinder/userfiles/files/56411674824.pdfIn PDF document text
    • http://deaprogettazioni.it/userfiles/files/mudepu.pdfIn PDF document text
    • http://ansonseatery.com/uploads/files/fokawezubamipalubido.pdfIn PDF document text
    • http://jinruily.com/UploadFile/file/20210913201133720.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/fzgW7-mxBc0/uplcv?utm_term=top+idioms+and+phrases+pdfPDF link annotation

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