Malicious PDF — malware analysis report

Static analysis result for SHA-256 5bab828c4911b6d5…

MALICIOUS

PDF

47.6 KB Created: 2021-07-09 01:52:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 0790e3784f23057131e0f3aa1e06f8d3 SHA-1: c385882aa0e80aaaa7f2bc20f7b0c587455c5e9a SHA-256: 5bab828c4911b6d513dde602bf61e0aff07a1a27bcf84eb340e473249afe655f
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as a malicious PDF by ClamAV and an ML classifier. It contains numerous links pointing to compromised WordPress upload directories and other domains, indicating a link farm designed to redirect users to potentially malicious content. The presence of these links suggests an attempt to distribute malware or conduct phishing operations.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7471

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://atlanthealth.com/wp-content/plugins/super-forms/uploads/php/files/1c2804de5addfeef04e042d709ff4a22/45347807365.pdf In PDF document text
    • http://irina-beha.com/ckfinder/userfiles/files/6545629480.pdfIn PDF document text
    • http://php-lounge.de/userfiles/file/44645637714.pdfIn PDF document text
    • https://szaktel.hu/uploads/file/9633481812.pdfIn PDF document text
    • http://ljhalls.com/wp-content/plugins/super-forms/uploads/php/files/32cc7bb7006e99462dbbe1eb6fedb52f/99838771753.pdfIn PDF document text
    • http://www.maderas-navarro.com/ckfinder/userfiles/files/polupopodotere.pdfIn PDF document text
    • http://vom-ragnaroek.de/uploads/file/tosemudatiraferewazevi.pdfIn PDF document text
    • http://am-assets.com/aom/magnolia/userfiles/file/tatusovosubatizin.pdfIn PDF document text
    • http://rauvuonsach.com/images/uploads/files/seside.pdfIn PDF document text
    • https://dsodrecital.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608dfd9617c3c---82552787694.pdfIn PDF document text
    • http://kystop.com/wp-content/plugins/super-forms/uploads/php/files/bconjf76b4i9cbdded6mfg4q17/88608579316.pdfIn PDF document text
    • http://daisytalavera.com/userfiles/files/forafodemujizedazi.pdfIn PDF document text
    • http://www.humillacionyestrella.org/ckfinder/userfiles/files/nogesosav.pdfIn PDF document text
    • http://nnk.gr/wp-content/plugins/formcraft/file-upload/server/content/files/160ac56dd973d0---37472153869.pdfIn PDF document text
    • http://www.olympussverige.se/wp-content/plugins/super-forms/uploads/php/files/4aah9d148a9uun5ffvjg8b54fb/150604023.pdfIn PDF document text
    • http://mini-garden.ru/userfiles/file/44300800112.pdfIn PDF document text
    • https://gmonlinestore.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b42cbc81ece---2741139684.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c8ef7db5e14---fojatewowovekubewakuze.pdfIn PDF document text
    • http://currycornersugarland.com/admin/images/file/desuwajexigokiwejimisikiv.pdfIn PDF document text
    • https://kisikana.hr/userfiles/file/8272638741.pdfIn PDF document text
    • http://www.champcaregivers.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607523e1442fa---44051101089.pdfIn PDF document text
    • https://ceilford.org/wp-content/plugins/super-forms/uploads/php/files/ee361d844431f2ab6e20cc4c6beb1ba5/7097310818.pdfIn PDF document text
    • https://amalighting.com/wp-content/plugins/super-forms/uploads/php/files/279ebdb5d9810a5e8df85a69bd74912c/73782774277.pdfIn PDF document text
    • https://www.sidertest.it/wp-content/plugins/formcraft/file-upload/server/content/files/160d26955f260d---57239620175.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3vuEKuznOb8/uplcv?utm_term=top+10+best+action+anime+2020PDF link annotation