Malicious PDF — malware analysis report

Static analysis result for SHA-256 9ed1efd18df217d3…

MALICIOUS

PDF

54.0 KB Created: 2021-09-24 11:26:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: f1ebae4ae658c7132529f4ac9c347128 SHA-1: d63db1e9cfd9de835e6c2ff1b53bd38a9d589a65 SHA-256: 9ed1efd18df217d31d2f96dfb1536e6542b20a645ee77fccb56846bcccbb4e20
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous embedded URLs, many of which point to disposable hosting or compromised CMS upload directories, indicative of a link farm designed to distribute malicious content. The ClamAV detection and ML classifier further support its malicious nature. While no scripts were explicitly extracted, the presence of external URIs and the nature of the heuristics suggest the PDF is intended to lure users to external sites, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6253

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://chcial.ru/uplcv?utm_term=naruto+slugfest+x+mod PDF link annotation
    • http://limoride.net/gallery/file/jubabapazidavu.pdfIn PDF document text
    • http://prime42.ru/userfiles/files/60720070402.pdfIn PDF document text
    • http://stapper.de/sites/default/files/userfilesfile/kugekusadasomigin.pdfIn PDF document text
    • https://funcarele.com/ckfinder/userfiles/files/88176579517.pdfIn PDF document text
    • http://brunagabriele.it/userfiles/files/65905798600.pdfIn PDF document text
    • https://pastijptoto.com/contents/files/78448457899.pdfIn PDF document text
    • http://thucphamchucnangmy.vn/uploads/files/xibamizetuvoto.pdfIn PDF document text
    • https://rebates.forex/wp-content/plugins/super-forms/uploads/php/files/j5aquhh3ufofgcfn7fok989qv1/wifatuwozudevasoxeseminuz.pdfIn PDF document text
    • http://md-servicios.com/userfiles/file/60891896879.pdfIn PDF document text
    • https://doan295doson.vn/namthuan/images/news/files/59071900234.pdfIn PDF document text
    • http://aimic.com/userfiles/file/lulupagoboboxep.pdfIn PDF document text
    • http://flixgolf.com/ckeditor/ckfinder/userfiles/files/jamifukamudal.pdfIn PDF document text
    • http://dobermanncz.eu/files/daxosel.pdfIn PDF document text
    • https://gruppopolidori.com/upload/image/file/45133838433.pdfIn PDF document text
    • http://studiogiovannone.com/userfiles/files/febolupuni.pdfIn PDF document text
    • https://slavica.ru/wp-content/plugins/super-forms/uploads/php/files/5e1bfbd8a72240758e745dc6c89b4fa6/kevoretogisujugisifigukeb.pdfIn PDF document text
    • http://www.festivalmarrakech.info/wp-content/plugins/formcraft/file-upload/server/content/files/1614d66bfc0b61---7663949609.pdfIn PDF document text
    • https://veritiesinstitute.com/wp-content/plugins/super-forms/uploads/php/files/a4d1e16067e2d4a3ae9fcf4f240f52a1/19918240617.pdfIn PDF document text
    • http://lnv-cnc.com/userfiles/file/zeturabewosebepifawuwin.pdfIn PDF document text
    • https://www.limratechnologies.net/wp-content/plugins/formcraft/file-upload/server/content/files/1612ef1967713c---39518647605.pdfIn PDF document text
    • https://shreenatharcade.com/userfiles/file/zadovuruzujefu.pdfIn PDF document text
    • https://bfull.ru/uploads/files/58209161791.pdfIn PDF document text
    • http://www.gitialiganjlko.org/ckfinder/userfiles/files/vaboti.pdfIn PDF document text
    • http://bayanairag.com/uploads/userfiles/files/79232122696.pdfIn PDF document text

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