Malicious PDF — malware analysis report

Static analysis result for SHA-256 ebdf372605cd25d0…

MALICIOUS

PDF

99.9 KB Created: 2021-10-14 06:21:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: 573c5184f4adad6638bc3af81e6a71ee SHA-1: b9c3052679f3e906fc9ac9bb83d7a8278948f189 SHA-256: ebdf372605cd25d0d38a9191ba012140d2b668d0c618c6b8eb3eb24d98c2d171
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains a link farm directing users to various websites, some of which are hosted on compromised CMS uploads. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. The primary function appears to be redirecting users through a series of links, potentially to a malicious payload or phishing page.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7451

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://re-media.ru/foto/ck/files/purigikobekusuv.pdf In PDF document text
    • http://xn--989ap7r0xbd5x.com/upload/fckeditor/file/39647137483.pdfIn PDF document text
    • https://mancomunidadvaldizarbe.com/userfiles/files/nenitotevodugorujobakoju.pdfIn PDF document text
    • http://tz5168.com/uploadfile/image/2021/10/10/file/20211010_160228_134.pdfIn PDF document text
    • http://www.mediacomriccione.it/wp-content/plugins/formcraft/file-upload/server/content/files/1616448a15e5e6---mebalogutifoliwogog.pdfIn PDF document text
    • http://unternehmensberatung-hegenbarth.de/userfiles/file/lawukumifexawedizivefoje.pdfIn PDF document text
    • http://stepasidemedical.ie/images/uploads/file/vorozulirujixa.pdfIn PDF document text
    • https://rais.bg/uploads/file/jemefopipunibije.pdfIn PDF document text
    • http://kesherisrael.com/uploadEditor/files/nunozomoxiwozifa.pdfIn PDF document text
    • https://lederstuehle-shop.de/ckfinder/userfiles/files/66542323177.pdfIn PDF document text
    • https://studiogreenwich.ru/wp-content/plugins/super-forms/uploads/php/files/5d9fff4fb111d8684e5eb4775a5da59c/55307069888.pdfIn PDF document text
    • http://syarmarka.ru/userfiles/files/4835617572.pdfIn PDF document text
    • http://kor-ra.ru/UserFiles/file/muzudigimemoreliperufatit.pdfIn PDF document text
    • http://subventionsbetrug.de/wp-content/plugins/super-forms/uploads/php/files/fveobgcuv4osa7t6kpr89fclgq/dirigedizipofaruxabapev.pdfIn PDF document text
    • https://portalbime.com/UploadedFiles/New/file/nuxaturoroputazum.pdfIn PDF document text
    • http://www.deco-interieure.com/userfiles/file/35794806035.pdfIn PDF document text
    • http://sm.ac.th/ckfinder/userfiles/files/96538219342.pdfIn PDF document text
    • http://rgn2u.com/userfiles/files/voboxevaxoganixera.pdfIn PDF document text
    • http://www.sunarpazarlama.com/wp-content/plugins/super-forms/uploads/php/files/837gsakq24opefckg9390uqu61/92977348013.pdfIn PDF document text
    • http://reelproductionshd.com/userfiles/file/38881324282.pdfIn PDF document text
    • https://buyafranchise.org/files/files/lolobur.pdfIn PDF document text
    • http://feedproxy.google.com/~r/MbOu/~3/4dZi1sgP-vI/uplcv?utm_term=avengers+age+of+ultron+streaming+itaPDF link annotation
    • http://perfecturology.cafe24.com/upload/editor/imagefile/37391436228.pdfIn PDF document text

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