Malicious PDF — malware analysis report

Static analysis result for SHA-256 20575ba80c2e3c2f…

MALICIOUS

PDF

67.9 KB Created: 2021-07-03 13:07:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 6a07f410ce810d514f176c0e24c43143 SHA-1: c1231eb4c6b582dd32c3d3c3430dd9f90e17aeb1 SHA-256: 20575ba80c2e3c2fa4dcf269bfbb10a216bba1d8c4bb6945c14bc2d79a662b68
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and ML classifiers, indicating a phishing or trojan threat. It contains numerous links, many pointing to compromised WordPress upload directories and disposable hosting, suggesting a link farm designed to distribute malicious content. The presence of external URIs and link farms strongly suggests an attempt to redirect users to malicious sites for further exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6525

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=indian+polity+m+laxmikant+6th+edition+pdf
    • https://beachesbrewing.com/wp-content/plugins/super-forms/uploads/php/files/1e71cbde7d5491db86c1f5c505828e4a/megefojagub.pdf
    • https://betenenergy.com/sites/default/files/file/luvapidikadipeb.pdf
    • https://brunoamaranti.it/wp-content/plugins/super-forms/uploads/php/files/bokc7tpn27ncbgu5i6gv7fbhs0/13408804448.pdf
    • http://fitviewer.de/files/file/lopevitutif.pdf
    • http://heritagecarletonplace.com/clients/c/c2/c23aa4fb54f25340752d20cfcff880b2/File/75531404412.pdf
    • http://richmore.kr/uploadfile/fckeditor/file/51179891015.pdf
    • https://www.penyembuhanholistikreiki.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609b8be5389c0---sogolefaxuburajugofobesot.pdf
    • https://yourownadviser.com/ckfinder/userfiles/files/zijasuja.pdf
    • http://www.zopfitravel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609df7c6e5a79---92776837534.pdf
    • https://golf-tout-terrain.com/publish/page/file/63316798621.pdf
    • http://aliancegroup.su/wp-content/plugins/formcraft/file-upload/server/content/files/160848d17bf4dc---boxowulozaxeri.pdf
    • https://dietacud.eu/upload/file/14012931342.pdf
    • http://plenaadoracao.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a0740d40163---75442484281.pdf
    • http://es-umzuege-transporte.de/wp-content/plugins/super-forms/uploads/php/files/fee3be8f758f70cba0f669aeb43dfa10/budozanoritadogikukaz.pdf
    • https://refour.dk/wp-content/plugins/super-forms/uploads/php/files/09e941f11b1a7852714d0b673ddf13df/wejoto.pdf
    • https://travels-ukraine.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c94f6c78225---damujevakexajabixa.pdf
    • http://ccswcd.com/userfiles/file/66338205528.pdf
    • http://midiabyz.com/wp-content/plugins/super-forms/uploads/php/files/af262c68c938f32192229536fb4c78d9/95516695262.pdf
    • http://synerfreight.com/syner_upload/images/files/neduj.pdf
    • https://fanaf.comarticle_ressources/file/17734903163.pdf
    • https://limpjet.com.br/wp-content/plugins/super-forms/uploads/php/files/0ce842f6e6c93cfa3635bcb4f3fa5447/2711256568.pdf
    • http://xiaohecollege.com/d/files/66504908110.pdf
    • https://agilitynd.com/wp-content/plugins/super-forms/uploads/php/files/02d9483d78f0509a999aab09901cd4c9/xasakilipobivoxiwore.pdf
    • https://kantankacreative.com/wp-content/plugins/super-forms/uploads/php/files/f8e48ab639ebf1a1885bfb659a86eb82/33565438471.pdf
    • https://skazkavdom.com/wp-content/plugins/super-forms/uploads/php/files/9290724dcff0bf13f2b0746eeb25608a/17683284356.pdf
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c530.bin
69ec644186b99b1f7db1de4352a3b44329bd2c98a74652fb33a63f129ff22574		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC530 17252 bytes
font_01_sfnt_off0000f238.bin
f2c529223f3e5683884d4dcbc7d978b9771125e376ad8ab1f559f470ce0f7cb4		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF238 10920 bytes

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