Malicious PDF — malware analysis report

Static analysis result for SHA-256 1a460820734af409…

MALICIOUS

PDF

47.7 KB Created: 2021-09-01 20:47:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: e8bbb5aff5ba9d1d3ab140f383bfdeb4 SHA-1: 91f5ef2183eabe2a19d95fed3d5aedc1f643b53f SHA-256: 1a460820734af409ceeb0a7ce1335f7c9a03d240c2d8b5a1f39024a52de533ef
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file contains numerous embedded URLs that point to compromised websites, many of which are hosted on WordPress installations. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a pattern of using disposable hosting for link farms, suggesting an attempt to obscure the true destination or evade detection. The ClamAV detection as 'Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0' strongly suggests a phishing or trojan distribution intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8648

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 https://medvor.ru/uplcv?utm_term=empire+and+puzzles+xp+farming PDF link annotation
    • https://pezenasenchantee.fr/userfiles/file/68854918975.pdfIn PDF document text
    • https://mission4recruitment.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e5e65ca5e55---fexikinejudu.pdfIn PDF document text
    • https://kolodezrus.ru/wp-content/plugins/super-forms/uploads/php/files/372f68f5b3cc3e98776c48592a10a37e/potimenepoveluxoduwudin.pdfIn PDF document text
    • http://aexpress.lv/index/images/up/file/panumezutozomokotatatutud.pdfIn PDF document text
    • http://qtjdb.com/UploadFile/2021/06/25/file/20210625_223239_156.pdfIn PDF document text
    • http://www.kinoimaging.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160949c836f5ea---27852342465.pdfIn PDF document text
    • https://ceadersvalet.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075c7068a6a7---jibusakomisixafezosewab.pdfIn PDF document text
    • https://www.modianodesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/1611956431b6a8---92952788120.pdfIn PDF document text
    • http://phuclocvienjsc.com/uploads/image/files/86142380517.pdfIn PDF document text
    • https://ikansambel.com/contents//files/penometejiketibuwulebilox.pdfIn PDF document text
    • http://pressvaluation.net/userfiles/file/gobideviwumimivareg.pdfIn PDF document text
    • http://www.kizkulesikizogrenciyurdu.com/public/ckfinderuploads/files/nikajajogadevutilo.pdfIn PDF document text
    • http://kartywspomnien.pl/uploads/assets/file/varer.pdfIn PDF document text
    • https://www.siemers-deutschmann.de/wp-content/plugins/super-forms/uploads/php/files/208gll1i83tf92ni6qco92m37s/36242473.pdfIn PDF document text
    • http://alexlunacoach.com/img/editor/file/22151482135.pdfIn PDF document text
    • https://catherinehourihan.art/wp-content/plugins/super-forms/uploads/php/files/7824e6520a40156eb39b5311165660ae/jijosu.pdfIn PDF document text
    • http://www.virtualaid.eu/wp-content/plugins/formcraft/file-upload/server/content/files/161053d313fce0---gejogo.pdfIn PDF document text
    • http://vpecargo.com/userfiles/file/sizijumefegokuruji.pdfIn PDF document text
    • http://paillasse.hu/userfiles/file/ratekemesaxakijefudop.pdfIn PDF document text

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