Malicious PDF — malware analysis report

Static analysis result for SHA-256 2c8c37ef7c256e90…

MALICIOUS

PDF

41.5 KB Created: 2021-09-19 06:57:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: d26412e5474db50432495b3b2f5c6cc9 SHA-1: e1cf9afe2e53e3827568f59dd0ca87473c908dcd SHA-256: 2c8c37ef7c256e90cfec6d288c4e9dfbb82cfdadd44d01c26879738cd421bdc6
174 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF is identified as a phishing lure due to its small size and the presence of a single image with an action trigger. It contains numerous external links, many pointing to compromised CMS uploads or disposable hosting, suggesting an attempt to redirect users to malicious content. The ClamAV detection and ML classifier further support its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7814

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
  • Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 1 image(s), only 0 text block(s), carries a click-outward action, and is only 41 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • 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://pixomot.ru/uplcv?utm_term=thoptv+version+36 PDF link annotation
    • http://gavionescodeinsa.com/userfiles/27967587206.pdfIn PDF document text
    • http://smirna.pl/files/file/87299458448.pdfIn PDF document text
    • https://baptistfriends.org/media/40135367926.pdfIn PDF document text
    • http://krajinar.cz/soubory/files/58534622372.pdfIn PDF document text
    • http://onmamtour.com/FileData/ckfinder/files/20210912_7CD4C7B344DB0DAC.pdfIn PDF document text
    • https://dobre-akce.cz/media/files/file/pafedipopoziw.pdfIn PDF document text
    • https://hantverkarenisandby.se/UserFiles/files/guxiwotubuwajobawonesubu.pdfIn PDF document text
    • https://campermagazine.tv/public/file/zugukilesazuku.pdfIn PDF document text
    • http://akkoryazilim.com/userfiles/file/xasanajafugugefiro.pdfIn PDF document text
    • https://upaspor.com/resimler/files/32855126769.pdfIn PDF document text
    • http://sunnysolutions.it/uploads/assets/file/15210872704.pdfIn PDF document text
    • http://italiangreyhound.pl/img1/userfiles/file/52989977096.pdfIn PDF document text
    • http://phongkhamthienhoa.vn/images/files/8134731655.pdfIn PDF document text
    • https://kodeac.com/wp-content/plugins/super-forms/uploads/php/files/psvhvn0jvbacqgd6oto0s4smbr/13099628710.pdfIn PDF document text
    • http://ricettebiagi.it/uploads/assets/file/69050749337.pdfIn PDF document text
    • https://www.luxboss.com/ckfinder/userfiles/files/12078733050.pdfIn PDF document text
    • https://hmjrgoldhockey.org/wp-content/plugins/super-forms/uploads/php/files/888305fb581d4d7e3af44d4cfefb6dbd/fatulileb.pdfIn PDF document text
    • http://oresteruggiero.com/userfiles/files/13037748535.pdfIn PDF document text
    • http://www.peplex.it/wp-content/plugins/formcraft/file-upload/server/content/files/16139383ae338e---63220433651.pdfIn PDF document text
    • http://www.holderit.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614371f47e9b4---71137689175.pdfIn PDF document text
    • https://optimustelecoms.com/ckfinder/userfiles/files/lepebuzagunabefukuwokopid.pdfIn PDF document text
    • https://behagi.eus/files/galeria/files/gekitozexela.pdfIn PDF document text

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