Malicious PDF — malware analysis report

Static analysis result for SHA-256 9179643e014748bf…

MALICIOUS

PDF

48.0 KB Created: 2021-09-10 13:01:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: ba52cc5db9c3fafe4704f2a44508ea9b SHA-1: f5df3f14d82ec02e5c11c8a3d38c40399b9b4255 SHA-256: 9179643e014748bfb781726d3632fd1e34f1dca38794724fd0cc1359484aad24
154 Risk Score

Malware Insights

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

The PDF contains numerous links to other PDF files hosted on various domains, many of which appear to be disposable or compromised. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware delivery. The presence of a link farm suggests an attempt to obscure the ultimate destination or to distribute multiple malicious payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8987

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://linuxnewyork.com/draft/media/kepijatakuj.pdf In PDF document text
    • http://studiodugnani.it/userfiles/files/mugivuvikuwele.pdfIn PDF document text
    • http://tpt.taipei/asset/uploads/files/22621790796.pdfIn PDF document text
    • http://labonguyenhoang.com/img-chamthi/files/xividadikadizaraguvox.pdfIn PDF document text
    • https://majorsagilekvaros.hu/uploads/file/zovonumogavemi.pdfIn PDF document text
    • https://pabxlg.com/userfiles/file/nudajujabikofo.pdfIn PDF document text
    • http://parkety-patemal.sk/files/file/99791725200.pdfIn PDF document text
    • https://adeptos.clevercloud.pt/images/items/files/texikasuwufepeze.pdfIn PDF document text
    • https://motionslam.com/wp-content/plugins/super-forms/uploads/php/files/9adf4ba602d7de1d30665fca198beda6/diwemumesepov.pdfIn PDF document text
    • http://asbu.net/uploads/FCK_files/file/fuzebesikez.pdfIn PDF document text
    • http://www.contal-farmer.com/uploads/files/74494267359.pdfIn PDF document text
    • http://aire-limpio.com/img/editor/file/21008944094.pdfIn PDF document text
    • https://www.ogblfrontaliers.fr/wp-content/plugins/super-forms/uploads/php/files/jpvbev4n4gpo9rqma570826917/12740147472.pdfIn PDF document text
    • https://cqc-material.com/app/webroot/userfiles/files/19868567395.pdfIn PDF document text
    • http://nedirajtebosnu.net/userfiles/file/pimowavazilow.pdfIn PDF document text
    • https://phoenixknights.co.uk/wp-content/plugins/super-forms/uploads/php/files/874d157c51c8eb30b840ab76e972e66a/73169412389.pdfIn PDF document text
    • http://hitmet.slektenkaas.com/bilder/file/tixutagurapebuno.pdfIn PDF document text
    • http://js-space.de/userfiles/file/69473171191.pdfIn PDF document text
    • http://websurin.net/UserFiles/File/28693915838.pdfIn PDF document text
    • http://studiotecnicoprato.eu/userfiles/files/venototewugowefagozonitud.pdfIn PDF document text
    • https://autotrilogy.com/wp-content/plugins/super-forms/uploads/php/files/3dfa56da70c65f758ecc4ac61cafacdf/84651495087.pdfIn PDF document text
    • https://expungemyrecordnj.com/wp-content/plugins/formcraft/file-upload/server/content/files/161381a928ff03---semekevol.pdfIn PDF document text
    • https://eurotig.ro/file/kejomasakofajetukematul.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3vuEKuznOb8/uplcv?utm_term=proxy+tunnel+apkPDF link annotation

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