Malicious PDF — malware analysis report

Static analysis result for SHA-256 3abc4f2717b95e97…

MALICIOUS

PDF

48.7 KB Created: 2021-09-25 14:21:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: f3ce763d0de1845166f54b31ceb5e899 SHA-1: 2ebfc943314ade18c72f245dacbd74d47e0ddb74 SHA-256: 3abc4f2717b95e97001f70dab82a584d9233c08f251bd72e6e9752b49d8059a5
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, many of which point to compromised WordPress sites or disposable hosting, suggesting a link farm designed to distribute malicious content or phish users. The presence of external URI heuristics and the nature of the URLs indicate a potential for further malicious activity, such as downloading second-stage payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5962

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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 http://billagelaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/dowege.pdf In PDF document text
    • http://sentezetutmerkezi.com/upload/ckfinder/files/fubobuxajopopulefesegij.pdfIn PDF document text
    • http://xaydunglenguyen.vn/upload/files/e6bfcd.pdfIn PDF document text
    • http://zbraneklapka.cz/ckfinder/userfiles/files/31860928402.pdfIn PDF document text
    • https://ddriu.hu/wp-content/plugins/super-forms/uploads/php/files/a9500ae35eb447ca5894e811454623d9/60401106.pdfIn PDF document text
    • https://e-tta.com/app/webroot/userfiles/files/lomotelavifenakironedekav.pdfIn PDF document text
    • http://novena99.com/uploads/files/202109231153153685.pdfIn PDF document text
    • https://theshamrockpublecco.it/file/10439807257.pdfIn PDF document text
    • http://jindi2010.com/uploadfile/files/86922702758.pdfIn PDF document text
    • https://peoplehelppeople.net/uploads/File/97290654032.pdfIn PDF document text
    • http://mygiftltd.com/userfiles/file/4597525176.pdfIn PDF document text
    • https://travelworld.ro/userfiles/file/bodiweroxaguziwifokafaku.pdfIn PDF document text
    • http://imaginove.eu/data/Files/93080441505.pdfIn PDF document text
    • http://letsfinal.com/userfiles/file/78142467453.pdfIn PDF document text
    • http://www.linkkorea.co.kr/wp-content/plugins/formcraft/file-upload/server/content/files/161334a924e341---vakisupemaguvefiw.pdfIn PDF document text
    • https://loyd.rs/images/file/54185507833.pdfIn PDF document text
    • https://ekselantechnology.solutions/ckfinder/userfiles/files/gixafeponuvedavepuno.pdfIn PDF document text
    • http://radtel-sport.pl/userfiles/file/59317897796.pdfIn PDF document text
    • https://www.capitalroofingct.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613862816441d---32842708217.pdfIn PDF document text
    • http://ambiance-cinema.fr/wp-content/plugins/super-forms/uploads/php/files/5f5299624ff80b1145c4e11493adfd75/lulola.pdfIn PDF document text
    • http://dakmet.pl/upload/xigure.pdfIn PDF document text
    • https://baatco.com/ckfinder/userfiles/files/76548358347.pdfIn PDF document text
    • https://alstar.uz/images/shared/file/67118297510.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/cv9VXjIrmdE/uplcv?utm_term=internal+storage+is+running+out+please+clean+up+nowPDF link annotation

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