Malicious PDF — malware analysis report

Static analysis result for SHA-256 ca3b1f3baa40c08b…

MALICIOUS

PDF

59.5 KB Created: 2021-09-08 00:06:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 28f4b09292cbe7dae7f218d70ee4e6f8 SHA-1: 9be3799d0518e32a3b209b795d3035926657e3ff SHA-256: ca3b1f3baa40c08b3f1bea72f5358fd9ece173b0ac0637d2e8d6c4090b4e03aa
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier as malicious. It contains numerous embedded URLs that form a link farm, with many pointing to compromised WordPress sites or disposable hosting. The presence of these links suggests an attempt to direct users to malicious content, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7008

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://chcial.ru/uplcv?utm_term=mapa+metro+lisboa+pdf PDF link annotation
    • https://highfieldhousehotel.net/nbloom/fckuploads/file/dapedibunikodajumili.pdfIn PDF document text
    • http://www.thunderesp.com/ckfinder/ckfinder.htmlfiles/nuxalekepabadevisonezax.pdfIn PDF document text
    • http://zpb-maciejewski.pl/upload/fck/file/44694777592.pdfIn PDF document text
    • http://russkiivopros.com/images/FCKeditor/file/83611488782.pdfIn PDF document text
    • http://multi-accueil.fr/ressource/site-image/files/356002093.pdfIn PDF document text
    • https://corianderedmonton.com/ckfinder/userfiles/files/17607973335.pdfIn PDF document text
    • http://www.kinoimaging.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160719698c7a97---4373882568.pdfIn PDF document text
    • http://plncse.hu/php_data/file/piwefewogugudovejunir.pdfIn PDF document text
    • http://www.virtualaid.eu/wp-content/plugins/formcraft/file-upload/server/content/files/1606d3b195fb7e---54342496749.pdfIn PDF document text
    • http://sun-tes.ru/files/file/xixijozasodufufunanem.pdfIn PDF document text
    • http://lungtransplantopen.com/clients/d/de/de7cc03d42bda6b8b84c8ac9728529bb/File/vadixem.pdfIn PDF document text
    • http://aptchasers.com/FCKeditor/userfiles/file/nitibo.pdfIn PDF document text
    • https://agmatbaa.com/upload/files/buweko.pdfIn PDF document text
    • http://sgpeo.pl/users/file/retum.pdfIn PDF document text
    • http://szrealty.net/uploadpic/2021-5/file/2021051615574473499.pdfIn PDF document text
    • https://alfa-clining.ru/wp-content/plugins/super-forms/uploads/php/files/c79b2b3674734e88b45dcfb6df75f031/puzizato.pdfIn PDF document text
    • https://frennphotography.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a8a5c257600---xujodom.pdfIn PDF document text
    • http://poongdung.com/FileData/ckfinder/files/20210621_91C708B4AA11DBC8.pdfIn PDF document text
    • http://allg-gyn.ch/userfiles/file/xamodaroludaguvigovexuz.pdfIn PDF document text
    • https://csom.cz/wp-content/plugins/super-forms/uploads/php/files/e3c8a7bdd3df9f833d90ca460f385f41/45796167537.pdfIn PDF document text
    • http://premiumresourcing.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606fff76c0691---voxagimozarikufubalew.pdfIn PDF document text
    • http://noithatsah.com/webroot/img/files/tubunuwekiwuwab.pdfIn PDF document text
    • https://www.oneirishrover.com/wp-content/plugins/super-forms/uploads/php/files/b95da3461b88956b84567dbd4c12f41e/gapadaboja.pdfIn PDF document text
    • https://retrofitoman.com/ckfinder/userfiles/files/lapifoduxupatose.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_off0000d15f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD15F 10688 bytes
SHA-256: 67ca9928befec02b51ed84e17e7384f2887f0a67db765b93483c3b54dd5c6596

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