Malicious PDF — malware analysis report

Static analysis result for SHA-256 bd1ff664c010c80c…

MALICIOUS

PDF

53.7 KB Created: 2021-09-03 04:56:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 4a9458be6a161828e9e88a01d6a56951 SHA-1: ef4f66a2cb539a7dbb7a2b82a90f035a238ef1b4 SHA-256: bd1ff664c010c80c0f627513ff03624c40286fb30dcc568e4a5957aceb04c306
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous links pointing to websites hosted on compromised CMS platforms, indicating a link farm designed to redirect users. The ClamAV detection and ML classifier strongly suggest malicious intent, likely for phishing or distributing further malware. The file's structure and numerous external links align with techniques used to obscure the ultimate destination and evade initial detection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5894

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://ilovegabal.net/fckeditor/_upload/file/99714629953.pdf In PDF document text
    • http://worksafeorg.com/wp-content/plugins/super-forms/uploads/php/files/dvh42b39jv6t2vml2aq165k291/kuvutalexejof.pdfIn PDF document text
    • https://ventana-sur.com/wp-content/plugins/formcraft/file-upload/server/content/files/160abc5c6f35d1.pdfIn PDF document text
    • http://www.supercarrentalsofmiami.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c14216e6426---24538660495.pdfIn PDF document text
    • http://www.majorisinvestimentos.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16115cbcaada8d---15347800605.pdfIn PDF document text
    • http://www.texaco.bargiel.com.pl/ckfinder/userfiles/files/kuvakexuxotuvujopamono.pdfIn PDF document text
    • http://www.nandomoraes.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160c94f8ee74d4---wewogizijumatil.pdfIn PDF document text
    • https://rajatotogroup2.com/contents//files/rasezinidavobedaxobezarum.pdfIn PDF document text
    • https://grandhotelbulgaria.com/userfiles/file/47108235806.pdfIn PDF document text
    • http://lse.hu/userfiles/file/kemolawafifedekurubatalex.pdfIn PDF document text
    • https://donnasalon.ru/wp-content/plugins/super-forms/uploads/php/files/b6dc77913e166c6f7e0dec3ef5926119/ninexawurixinodumux.pdfIn PDF document text
    • https://sdyh.gr/wp-content/plugins/super-forms/uploads/php/files/9m1bntsmvk5h6tg2mer2sfb656/saxezititolegidugegub.pdfIn PDF document text
    • https://nbtele.com/en/cache/fck_files/file/wotugapewikunik.pdfIn PDF document text
    • https://aradmissions.com/ci/userfiles/files/90470223276.pdfIn PDF document text
    • http://nakamurasangyou.jp/app/webroot/uploads/files/68356080107.pdfIn PDF document text
    • http://bjoybrands.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607533028a1bd---74610618616.pdfIn PDF document text
    • https://bya-ingenieria.com/ckfinder/userfiles/files/28946346567.pdfIn PDF document text
    • https://betenenergy.com/sites/default/files/file/rakexof.pdfIn PDF document text
    • https://phuketwebstudio.com/ckfinder/userfiles/files/kopadup.pdfIn PDF document text
    • http://profitoolinfo.ru/ckfinder/userfiles/files/99893279912.pdfIn PDF document text
    • http://eltonltd.ru/sites/default/files/uploads/47763466040.pdfIn PDF document text
    • https://jordan.si/dokumenti/file/lebekobasonowaxavo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/PmAiG5ZyT-k/uplcv?utm_term=tagged+pdf+formatPDF link annotation

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