Malicious PDF — malware analysis report

Static analysis result for SHA-256 44fb70dce67632fa…

MALICIOUS

PDF

48.0 KB Created: 2021-09-08 14:32:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: cc6d80be21e2758f383d549fe5e41aa3 SHA-1: 6284d9ab033d27e07fb82aa98bc1eb755642b798 SHA-256: 44fb70dce67632fa82152f851cf67ac87ef030c6a729583049de047f8d5b450e
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, with many pointing to domains that appear to be part of a link farm designed to obscure the ultimate destination. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware delivery. While no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with techniques used to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6791

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://gillsandgeckos.com/userfiles/file/fesivifowemabiwizaso.pdf In PDF document text
    • https://chameleoncoupons.com/adgprocessing/uploads/files/bulizaweralusupato.pdfIn PDF document text
    • https://thefertilizergranulator.com/d/files/wulezeviwazana.pdfIn PDF document text
    • http://sarkar.ie/userfiles/file/95795664014.pdfIn PDF document text
    • http://ttfi.org/app/webroot/userfiles/file/wulamikofolizosopedutadit.pdfIn PDF document text
    • http://newcityhk.com/userfiles/vidomasateka.pdfIn PDF document text
    • https://impeka.lt/components/com_mijoshop/opencart/image/data/files/mitesa.pdfIn PDF document text
    • https://afritransport.com/app/webroot/files/file/guniviz.pdfIn PDF document text
    • http://iviltra.lt/images/files/lepezilafawulalaw.pdfIn PDF document text
    • http://xn--9p4b29dncp2cc6y.net/upload/fckeditor/file/37234742838.pdfIn PDF document text
    • http://www.telsercom.com/wp-content/plugins/formcraft/file-upload/server/content/files/16134135338697---ropabujekogokewi.pdfIn PDF document text
    • http://a-mega.ua/images/uploads/file/95220453097.pdfIn PDF document text
    • https://hacunamatata.ru/wp-content/plugins/super-forms/uploads/php/files/fe97147878120edf52add64d0fd4a447/jaxavomuvakakul.pdfIn PDF document text
    • http://akpanlawoffice.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/juzitifumi.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/S30rS-6n6vg/uplcv?utm_term=cephalohematoma+vs+caput+succedaneum+pdfPDF link annotation

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