Malicious PDF — malware analysis report

Static analysis result for SHA-256 ce477d804e3fba43…

MALICIOUS

PDF

84.6 KB Created: 2021-08-11 15:08:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: c2c08e757c0b66bab7543882c5749176 SHA-1: 5ff294133b4ce60c8c8f6799dd545c3e0d388d44 SHA-256: ce477d804e3fba43fd8acef88d078ea2346528d34b389bf1abb4ec7e1e62d559
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains a link farm pointing to multiple compromised WordPress sites and disposable hosting, suggesting an attempt to obscure the final destination. The embedded URLs are likely used to redirect users to phishing pages or download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9003

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://mas.vacations/wp-content/plugins/formcraft/file-upload/server/content/files/1609984bea2476---retudezuminuzedepenexepo.pdf In PDF document text
    • http://www.expo-hotel.com/english/wp-content/plugins/formcraft/file-upload/server/content/files/160b9d6bf5ab05---fubojeselaleto.pdfIn PDF document text
    • http://accessiblevehicleservices.com/userfiles/file/xipezukev.pdfIn PDF document text
    • http://shinserviceodi.ru/wp-content/plugins/super-forms/uploads/php/files/84ca9863995decfd97a6bb59cc5e3839/texaperivezarefitutewox.pdfIn PDF document text
    • http://ranaghatpchsschool.org/userfiles/file/pitizanojavexebawumepaban.pdfIn PDF document text
    • http://austria-ex.com/images/blog//file/61760641040.pdfIn PDF document text
    • http://cozycornerexpress.com/uploads/files/titiziwabefezilalujona.pdfIn PDF document text
    • http://www.barankayalar.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1610499a6d404c---13602535694.pdfIn PDF document text
    • http://ancheng-medical.com//uploadfile/files/mamupowopi.pdfIn PDF document text
    • http://www.morenoroofing.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a86e92c018e---tepusekin.pdfIn PDF document text
    • http://timebymtm.com/upload/files/lesemode.pdfIn PDF document text
    • https://vibangthuaphatlai.net/uploads/files/rorarewovupetezufejapuru.pdfIn PDF document text
    • http://harasim.cz/uploaded/files/bivinedapa.pdfIn PDF document text
    • http://cocoal.com/uploads/file/deputuvositadefafobajif.pdfIn PDF document text
    • https://eobliecky.sk/userfiles/file/vazuzidika.pdfIn PDF document text
    • http://ucity68.com/clients/e/ea/ea220da86df44fb0ae3b7c8e8295ccc1/File/vovemadufoso.pdfIn PDF document text
    • http://cocoal.com/uploads/file/zexozuxofiresozikakip.pdfIn PDF document text
    • http://teaandtiara.ca/clients/c/cf/cffd5a667a547ddf6f7ed7e454f715b7/File/sewaxexuxorati.pdfIn PDF document text
    • https://belgradenightlife.info/wp-content/plugins/super-forms/uploads/php/files/dht6na7tl1ns87u8gvt12lv6dp/58887288500.pdfIn PDF document text
    • https://tempegaring.com/contents//files/pagajigidalitu.pdfIn PDF document text
    • http://www.leesii.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f72a208750---92730501633.pdfIn PDF document text
    • http://bizwd.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bbe51947e44---34431561196.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/ngfLrbzwjls/uplcv?utm_term=exercices+corrig%C3%A9s+intensit%C3%A9+du+courantPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000112ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x112BA 10836 bytes
SHA-256: 55c67d757c97a45934b6e8949af2b4622392f92d80438b40bf2792f2ccc3cdef
font_01_sfnt_off00012b6b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12B6B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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