Malicious PDF — malware analysis report

Static analysis result for SHA-256 c968bcf4f7b71036…

MALICIOUS

PDF

48.0 KB Created: 2021-09-05 10:14:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 9c945589ee13bed7ffd6066e5f219822 SHA-1: f3878b16e1216e409e8f758d29c7b49c4837d3d1 SHA-256: c968bcf4f7b71036addf5a55e8a0747a4a7f14e69d46ebe50e9d17c516677faa
154 Risk Score

Malware Insights

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

The PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It functions as a link farm, embedding numerous URLs that point to compromised or disposable hosting, likely to redirect users to malicious content. The presence of multiple links on potentially compromised CMS upload directories and disposable hosting reinforces its role as a distribution point for further malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9210

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://visusmarble.com/images_upload/files/mijizurukeku.pdf In PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d94c9228689---75848526568.pdfIn PDF document text
    • http://birnagarcollege.in/userfiles/file/kegekamerodanujitola.pdfIn PDF document text
    • http://polymer-optix.de/userfiles/file/kezutunibejolijoxasixitob.pdfIn PDF document text
    • https://hotelritariccione.it/wp-content/plugins/formcraft/file-upload/server/content/files/1610998af5e1a1---lisakip.pdfIn PDF document text
    • http://rgn2u.com/userfiles/files/25415346521.pdfIn PDF document text
    • https://pecsikult.hu/files/file/95922062942.pdfIn PDF document text
    • http://jouezadomicile.org/clients/4/49/49939bf6a151252ba1adfe53d1befa29/File/liwobora.pdfIn PDF document text
    • http://centralgiving.com/media/userfiles/file/zepuluwu.pdfIn PDF document text
    • https://ietc-oman.saktoon.com/userfiles/files/natulipowa.pdfIn PDF document text
    • http://www.workbythai.com/admin/assets/images/mesuxaxotopajudupana.pdfIn PDF document text
    • https://3dreamstudios.com/wp-content/plugins/super-forms/uploads/php/files/62a8f9a75ab1d15c99e9d7d92d135de6/54940867807.pdfIn PDF document text
    • http://beming.com/ressource/site-image/files/18002750229.pdfIn PDF document text
    • http://endustriyelkiralama.com/wp-content/plugins/super-forms/uploads/php/files/tksjlvajn3ftppal4f4ogu7bnq/xobujaxakiniji.pdfIn PDF document text
    • https://sukienmiennam.com/userupload/files/63198033712.pdfIn PDF document text
    • http://sunnysidehighschoolclassof59.com/clients/867562/File/15883057147.pdfIn PDF document text
    • http://www.ellisrasbetonwerke.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160913fa3bb59a---73635960313.pdfIn PDF document text
    • http://remontnoedelo.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160bd7e1b1cb80---gimosowezovigito.pdfIn PDF document text
    • https://showdetango.com/bafa/userfiles/file/75171889050.pdfIn PDF document text
    • http://rybarict.cz/webpagebuilder/ckfinder/userfiles/files/13777431628.pdfIn PDF document text
    • https://www.toptalentusa.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082abc910789---robuj.pdfIn PDF document text
    • https://fratellifurloni.it/file/sefotokiminurisa.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/FevRqgeaUVY/uplcv?utm_term=totaline+thermostat+p474+installation+manualPDF link annotation

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