Malicious PDF — malware analysis report

Static analysis result for SHA-256 bbbcfea142771aa9…

MALICIOUS

PDF

47.8 KB Created: 2021-09-06 23:54:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 70cc609481aa642fde3dc741b71a91ca SHA-1: f138c22cd0e23142598b0c78d1a49c2a04d67733 SHA-256: bbbcfea142771aa98b38155089e545373a3dade58c0c0eb04d30848711424f43
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a phishing or trojan threat. It functions as a link farm, containing numerous URLs that point to compromised WordPress sites and disposable hosting domains, likely intended to redirect users to malicious content. The presence of these links suggests an attempt to lure users to external sites for further exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9210

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://thefutureofgolf.eu/wp-content/plugins/formcraft/file-upload/server/content/files/1609f1a50408fd---18789790776.pdf In PDF document text
    • http://kcobafl.org/ckfinder/userfiles/files/48567820591.pdfIn PDF document text
    • https://www.hausbootgeiseltalsee.de/wp-content/plugins/super-forms/uploads/php/files/1rttk197201n0fo72c5orvih89/16999401259.pdfIn PDF document text
    • http://kelvista.lt/images/files/bunemubupedojinizabubip.pdfIn PDF document text
    • https://renebeumer.nl/userfiles/file/xemaj.pdfIn PDF document text
    • https://mimpiindahsatu.com/contents//files/tixukexofisaviliza.pdfIn PDF document text
    • http://drapa-technika.cz/UserFiles/File/lolibojoxajuguvo.pdfIn PDF document text
    • https://tasleemdubai.com/userfiles/files/muvodowotoxa.pdfIn PDF document text
    • http://www.communityheroesproject.org/wp-content/plugins/formcraft/file-upload/server/content/files/160a0149aae21a---65433277440.pdfIn PDF document text
    • http://az4group.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16072e90a744ba---79796537863.pdfIn PDF document text
    • http://goldway.jp/upload/board/file/gobokupa.pdfIn PDF document text
    • http://share-world.tw/userfiles/file/77529356644.pdfIn PDF document text
    • https://matras-matrasych96.ru/admin/ckfinder/userfiles/files/79012086758.pdfIn PDF document text
    • http://ophirtonhotel.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16073f07f0b3b7---85914961792.pdfIn PDF document text
    • http://herfon-machinery.com/images/ckfinder/files/20210830100439.pdfIn PDF document text
    • https://sumangold.net.vn/wp-content/plugins/super-forms/uploads/php/files/7aguarp0kcnh88iv44vcjhtuhu/silugavofod.pdfIn PDF document text
    • https://proff-doors.ru/wp-content/plugins/super-forms/uploads/php/files/c3f4dd3b428daf6b8b6f0eebeadd923c/20293118925.pdfIn PDF document text
    • http://www.thunderesp.com/ckfinder/ckfinder.htmlfiles/85247988074.pdfIn PDF document text
    • https://rrvchefs.com/wp-content/plugins/super-forms/uploads/php/files/d78c457d4106d7420c75f3ccd6be0183/15845201029.pdfIn PDF document text
    • http://remontnoedelo.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160c083077c5ce---39209617316.pdfIn PDF document text
    • http://hoteldanang.vn/uploads/images/files/pelaxexifixujuduxila.pdfIn PDF document text
    • http://melissajacksonmd.com/wp-content/plugins/formcraft/file-upload/server/content/files/16090622a9a8d4---68944643883.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1xuhb7AK25c/uplcv?utm_term=cloud+vs+on+premise+comparison+pdfPDF link annotation

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