Malicious PDF — malware analysis report

Static analysis result for SHA-256 fa42b6e81141a5f3…

MALICIOUS

PDF

59.5 KB Created: 2021-10-07 07:34:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-20
MD5: ce06a30fdf5d786d34d7b3816c79b0d3 SHA-1: cfe0db6d2ac5845ce2ec1bcd25042ccb63ccd2ff SHA-256: fa42b6e81141a5f375230aeff5f29da0f675224e9991a617bf59d1557aeb897c
132 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample is a PDF containing embedded JavaScript, which is a common technique for delivering malicious content. The PDF also functions as a link farm, directing users to multiple external URLs, some of which are hosted on compromised CMS platforms. The embedded JavaScript likely facilitates the redirection or download of further malicious payloads from these URLs.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.3255

Heuristics 6

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://sriagasthiyarastro.com/FCKeditor/userfiles/file/dijojevivovak.pdf In PDF document text
    • https://corumosmanlimakina.com/js/ckfinder/userfiles/files/kumofinikutej.pdfIn PDF document text
    • http://kennyre.com/wp-content/plugins/formcraft/file-upload/server/content/files/16139c5d362b7f---14211806991.pdfIn PDF document text
    • https://mimpishio1bet.com/contents/files/motoduvonikasoromuriv.pdfIn PDF document text
    • https://ascii.tn/web/cgi/file/30556995415.pdfIn PDF document text
    • https://creativekids.abcedukacji.pl/web/uploads/files/lolaruvibemuwisoviwukixu.pdfIn PDF document text
    • http://mayingiabao.com/upload/files/gefakokak.pdfIn PDF document text
    • https://catequesisnavarra.org/guiarte_userfiles/files/6039405609.pdfIn PDF document text
    • http://www.sunarsurdurulebilir.com/wp-content/plugins/super-forms/uploads/php/files/0hb7s66bh0l8hcn27j7qnvdg75/98642657932.pdfIn PDF document text
    • http://frederickfollows.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/161485611922ab---kuvetapanal.pdfIn PDF document text
    • https://tmtteks.com/files/foxonimokutijogijupigopa.pdfIn PDF document text
    • https://www.mtiwelding.co.uk/admin/ckfinder/userfiles/files/13299793970.pdfIn PDF document text
    • https://spyboarcams.com/files/fasigatogojoperuzoj.pdfIn PDF document text
    • https://phase1acoustics.com/wp-content/plugins/formcraft/file-upload/server/content/files/16153959edaf65---611749576.pdfIn PDF document text
    • http://khautrangkhangviet.com/upload/img/files/zidixabe.pdfIn PDF document text
    • http://ha-sine.com/d/files/pitapunazogezixubi.pdfIn PDF document text
    • http://s2ipower.com/survey/userfiles/files/peduk.pdfIn PDF document text
    • http://www.moteco.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1615e64e75b9aa---77182561562.pdfIn PDF document text
    • https://administrador.bannik.com/benkio/files/25737203221.pdfIn PDF document text
    • http://oticonshop.com/ckfinder/userfiles/files/92043005399.pdfIn PDF document text
    • https://cauthinh.com/luutru/files/44506606280.pdfIn PDF document text
    • https://molecult.metallo-tests.ch/sites/web/upload/files/vipepezolapawi.pdfIn PDF document text
    • http://hzjksj.com/images/upload/File/18209122835.pdfIn PDF document text
    • http://footstepfloor.com/upfiles/files/94056629160.pdfIn PDF document text
    • https://gulfb2b.com/userfiles/file/bowabilorurefexare.pdfIn PDF document text
    • http://lmalaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/19655123227.pdfIn PDF document text
    • http://4998horo.gmmwireless.com/contents/files/jegomuw.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1xuhb7AK25c/uplcv?utm_term=the+bag+piperPDF link annotation

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