Malicious PDF — malware analysis report

Static analysis result for SHA-256 654722e4af0b1846…

MALICIOUS

PDF

78.3 KB Created: 2021-08-12 05:00:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 0975a4936f04d06a863dda6254041f91 SHA-1: c41f6d185df5ee650e1caf8f0f68f085a06015f1 SHA-256: 654722e4af0b184660bdd512a693a99f080e30e3e7ea9a9929c3010fa92cf38b
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains a link farm pointing to multiple compromised websites and disposable hosting, suggesting an attempt to obscure the final malicious destination. The presence of external URIs and the nature of the heuristics indicate a likely phishing or malware distribution lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6251

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 https://crysiq.ru/uplcv?utm_term=fredie+didier+processo+civil+pdf+vol+1 PDF link annotation
    • http://moristas.com/userfiles/files/rerizupigefurojonuwuluwob.pdfIn PDF document text
    • http://cdio.vn/uploads/userfiles/file/pedaxazenaxifagaz.pdfIn PDF document text
    • https://colakcivi.com/userfiles/file/35865429161.pdfIn PDF document text
    • http://dichvugiayphep.biz/upload/ck/files/zuxarunoja.pdfIn PDF document text
    • https://dazzlin.co.uk/wp-content/plugins/super-forms/uploads/php/files/81a09612d44a47b1bca32e81f52aaf76/83766191718.pdfIn PDF document text
    • http://vtracauto.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609abcb9068b8---burululudavubusexo.pdfIn PDF document text
    • https://forex-robo.org/wp-content/plugins/super-forms/uploads/php/files/d91fcaadb40bb5ee9b948dd40fabdadf/50358196404.pdfIn PDF document text
    • http://az4group.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160b6694145446---gazunefazofaf.pdfIn PDF document text
    • http://tv-sat.cz/userfiles/file/86120494342.pdfIn PDF document text
    • http://www.ebsjosepirosamaria.com/wp-content/plugins/formcraft/file-upload/server/content/files/160703e9420c12---69269421502.pdfIn PDF document text
    • https://coloreverything.love/wp-content/plugins/super-forms/uploads/php/files/8c47f6c47ced57699f0714f25eea2b1c/53698389051.pdfIn PDF document text
    • http://southfieldhigh1973.com/clients/2/27/27a5067865c8334ad4a5a1fd7642c928/File/22037906488.pdfIn PDF document text
    • http://www.franklinwebdesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071f2981957d---dobixuv.pdfIn PDF document text
    • http://thaimassageboy.com/ckfinder/userfiles/files/zabarujupul.pdfIn PDF document text
    • https://phoenixknights.co.uk/wp-content/plugins/super-forms/uploads/php/files/014755a246bc30ced05bd79ccb733a52/zudirejipeganuwis.pdfIn PDF document text
    • https://zazilha.com.mx/wp-content/plugins/super-forms/uploads/php/files/bd7b5745a1e9b94ac2d5df2e5270cb83/mudesuvorozoxabunax.pdfIn PDF document text
    • http://yishiweb.com/upfiles/files/20210611_063221.pdfIn PDF document text
    • http://asesorialuishervas.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b836404e07d---46215429791.pdfIn PDF document text
    • http://savitapiti.org/ckfinder/userfiles/files/regoxidabufaxosuvelo.pdfIn PDF document text
    • https://medosojewellery.com/userfiles/files/fomugafogapawilusedomi.pdfIn PDF document text
    • https://hometeamcorp.com/images/usr/18129797698.pdfIn PDF document text
    • https://meesens.be/KrMee/Tekstverwerker/nawikivapibarus.pdfIn PDF document text
    • http://cdhsalumni.com/clients/28864/File/velexebamazinizixajunu.pdfIn PDF document text
    • https://sanmall.ru/files/uploads/files/61385249331.pdfIn PDF document text
    • http://northphoenixmustangs66.com/clients/4/4b/4b49b54eec06ebba3741256e9f3e6f2b/File/49087829648.pdfIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000108c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x108C4 21608 bytes
SHA-256: c60196a4128c327ec614f5296ec5b93fde8182bff3881a8d6fa0f461e6b1ee6f

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