Malicious PDF — malware analysis report

Static analysis result for SHA-256 27cb04427d87288d…

MALICIOUS

PDF

65.4 KB Created: 2021-07-25 09:27:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 9e562ef2d866482a2aa23f62e2beaafa SHA-1: 14f45a9f8d3f8d592e213cd4f8b26bd714fc50fc SHA-256: 27cb04427d87288d7a10b49896bfa6ae33f1f81355a6632b68f4d3b49ef2555d
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many pointing to compromised websites or disposable hosting, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware delivery. While no scripts were explicitly extracted, the PDF structure and embedded links are indicative of a malicious document, potentially leveraging JavaScript for exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9558

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 http://gancza.pl/userfiles/file/81723103554.pdf In PDF document text
    • http://hz-karavany.cz/ckfinder/userfiles/files/63872977268.pdfIn PDF document text
    • http://christembassydocklands.org/wp-content/plugins/super-forms/uploads/php/files/7da2b90d75fa716e47d1d256b9f39cbd/82841201268.pdfIn PDF document text
    • http://gostium.com/wp-content/plugins/formcraft/file-upload/server/content/files/160da373959d6a---kalasowado.pdfIn PDF document text
    • http://parfumerieindex.nl/images/uploads/wiviwinik.pdfIn PDF document text
    • http://zamokugrofa.sk/admin/fckeditor/file/27113127125.pdfIn PDF document text
    • https://majorsagilekvaros.hu/uploads/file/30345081168.pdfIn PDF document text
    • https://givemeit.ru/wp-content/plugins/super-forms/uploads/php/files/6dc29d334dd3d1fe3af98b5b143dd43b/jumititupakemerodopumine.pdfIn PDF document text
    • http://pallenberg-busreisen.de/uploads/files/56069225127.pdfIn PDF document text
    • https://allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/0412980b28e3133345db2188f1932629/juwekidikefufavizevumo.pdfIn PDF document text
    • https://vinisfarm.com/wp-content/plugins/super-forms/uploads/php/files/a335e818d1259765d9f730df0c76d2c1/xinuwim.pdfIn PDF document text
    • http://totaleclipsenv.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f393c579a85---tonujubawim.pdfIn PDF document text
    • https://gizaviation.com/uploads/files/45782448795.pdfIn PDF document text
    • http://africanhairbraidingsalon.com/userfiles/file/juxevesib.pdfIn PDF document text
    • https://amartzon.store/wp-content/plugins/super-forms/uploads/php/files/fdd142c8af77f85fcf001abbb0355be0/nabosisavaxetolemupi.pdfIn PDF document text
    • http://xn--b1ahhafccpgkb2bxo.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/e05a0b00b216650eff52cc9013e77f93/3537765406.pdfIn PDF document text
    • https://majubesar.org/contents//files/62032679340.pdfIn PDF document text
    • https://panificiopasticceriabattaglia.it/file/78927211127.pdfIn PDF document text
    • https://rybczewice.pl/userfiles/file/75430409050.pdfIn PDF document text
    • https://havadisname.com/upload/ckfinder/files/58519724695.pdfIn PDF document text
    • http://execdentalclinic.com/uploads/ckfinder/userfiles/files/wexizifagukigixiwa.pdfIn PDF document text
    • https://cosmopolitanhotel.eu/uploads/wysiwyg/files/13878184154.pdfIn PDF document text
    • http://bawaconstructions.com/editorData/file/boxiweg.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/cv9VXjIrmdE/uplcv?utm_term=how+to+lose+weight+and+gain+muscle+dietPDF link annotation

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