Malicious PDF — malware analysis report

Static analysis result for SHA-256 ecac8a58f9f19058…

MALICIOUS

PDF

47.4 KB Created: 2021-09-25 12:21:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: f78f653c24c1e01a0af46014b0e196d7 SHA-1: b0ca3e9485a9a0aefce5008b77e0ace45c295837 SHA-256: ecac8a58f9f1905899a3393a1122a066a3f023070fdf189b8514378f7d6b3b63
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of external links, many of which are hosted on disposable domains or compromised WordPress sites, indicating a link farm designed to distribute malicious content or phish users. The ClamAV detection as 'Pdf.Phishing.Trojan' further supports its malicious nature. No scripts were extracted, but the structure and URL patterns are consistent with phishing or malware distribution campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6520

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 https://chcial.ru/uplcv?utm_term=zee+tv+on+firestick PDF link annotation
    • https://mountmoriahcamp.com/media/57317133168.pdfIn PDF document text
    • http://giteduguedesboires.fr/userfiles/file/86798828681.pdfIn PDF document text
    • http://ttccid.com/userfiles/files/77022119660.pdfIn PDF document text
    • http://neoneofitou.com/ckfinder/userfiles/files/xusenuvejukuvufakisepogi.pdfIn PDF document text
    • http://e-hematologica.com/users/file/zixatapidugapuj.pdfIn PDF document text
    • http://everintelconsulting.com/upload/file/202109131606162403.pdfIn PDF document text
    • https://happycondo.leaddeehub.com/userfiles/files/puzilis.pdfIn PDF document text
    • https://loppisidjupdalen.se/images/uploaded/file/lewiguz.pdfIn PDF document text
    • http://neoneophytou.com/ckfinder/userfiles/files/wokerikefigeledujavet.pdfIn PDF document text
    • https://livbiopharma.com/userfiles/file/gitebedewuk.pdfIn PDF document text
    • http://byecook.com/ckupload/files/xesewopafufuf.pdfIn PDF document text
    • https://aldapa.eus/files/galeria/files/60719868983.pdfIn PDF document text
    • http://terapie-psi.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1613eca9bcc419---3914140287.pdfIn PDF document text
    • http://businessplan-capalpha.eu/mbp/upload/images/images/upload/ckfinder/36456648550.pdfIn PDF document text
    • http://drukarnia-skawina.pl/app/webroot/media/files/zeduw.pdfIn PDF document text
    • http://0975811252cool.linker.tw/files/juvujabubezo.pdfIn PDF document text
    • https://adverto.ee/userfiles/file/45368980123.pdfIn PDF document text
    • https://www.modianodesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/16131b46ec17d8---67352585126.pdfIn PDF document text
    • https://metrosecuritynepal.com/assets/userfiles/files/webolovenunixuwur.pdfIn PDF document text
    • http://ty-int.com/files/files/48013745529.pdfIn PDF document text
    • https://www.ventisilva.com.br/ckfinder/userfiles/files/95515270503.pdfIn PDF document text
    • http://www.dr.schure.net/ckfinder/userfiles/files/vakeselokasebalamikefiv.pdfIn PDF document text
    • https://jaukiaplinka.lt/ckfinder/userfiles/files/lanuk.pdfIn PDF document text
    • https://www.hdontheroadnapoli.it/wp-content/plugins/formcraft/file-upload/server/content/files/16138a500b266e---63354314747.pdfIn PDF document text
    • https://ateneoarbonaida.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613b60ea8fc73---59635864032.pdfIn PDF document text

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