Malicious PDF — malware analysis report

Static analysis result for SHA-256 f66c59714d65b06c…

MALICIOUS

PDF

45.8 KB Created: 2021-09-19 10:10:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: c7d4239db2d9a7916fc8ce2b958f1563 SHA-1: 9e71d5abda78ebfb798c4c3d13fb0e339b8fe0be SHA-256: f66c59714d65b06c83dc51554d24df3877c50bcb83ff6c99c5667996c21e388b
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is a PDF containing numerous links to external websites, many of which are hosted on disposable domains or compromised CMS uploads. The ClamAV detection and ML classifier indicate malicious intent, likely related to phishing or distributing further malware. No scripts were extracted, but the PDF structure and embedded links strongly suggest a phishing or redirection attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7407

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://oniceh.ru/uplcv?utm_term=harry+potter+philosopher%27s+stone+screenplay+pdf PDF link annotation
    • https://mar3ol.com/Files/files/1564925395.pdfIn PDF document text
    • https://chorland-dining.com/webroot/editor-uploads/files/3635452911.pdfIn PDF document text
    • https://unchiulmihai.ro/files/fckeditor/file/89090047551.pdfIn PDF document text
    • http://ablerexthailand.com/userfiles/files/taxikemepitopajudabaxivux.pdfIn PDF document text
    • http://pc580.cn/upload_fck/file/2021-9-14/20210914064600634752.pdfIn PDF document text
    • http://mmprogetti.it/userfiles/files/dedovi.pdfIn PDF document text
    • http://jfe.hk/userfiles/buxorusiroluguzofojaput.pdfIn PDF document text
    • https://yp05.com/_UploadFile/Images/file/jadud.pdfIn PDF document text
    • http://equipociclistaugeraga.com/ciclistas/userfiles/file/62228673329.pdfIn PDF document text
    • http://go-trec.com/wp-content/plugins/super-forms/uploads/php/files/ennvqf3a7otedo4nrqvtp741fl/vumogamisupixapagikezo.pdfIn PDF document text
    • https://www.aironface.com/wp-content/plugins/super-forms/uploads/php/files/d4518f9a907ac1b8da38190c3792ddec/89071150123.pdfIn PDF document text
    • https://www.leasing.net.in/ckfinder/userfiles/files/puludamovowiduzazet.pdfIn PDF document text
    • https://ourcampuswindow.com/ckfinder/userfiles/files/17638565851.pdfIn PDF document text
    • https://unique.global/wp-content/plugins/super-forms/uploads/php/files/f5a957056524dd710779f883fb7c666b/12605954853.pdfIn PDF document text
    • http://ziepniekkalns.lv/wp-content/plugins/formcraft/file-upload/server/content/files/16139e93b723e5---74561933536.pdfIn PDF document text
    • http://jingmingtai.com/filespath/files/20210912181721.pdfIn PDF document text
    • https://asigurareingermania.ro/wp-content/plugins/super-forms/uploads/php/files/9gscu41d2a2cnacd33iqc8ubd9/36394201454.pdfIn PDF document text
    • https://www.smartfutureexpo.com/ckfinder/userfiles/files/95895725326.pdfIn PDF document text
    • https://too.kg/wp-content/plugins/super-forms/uploads/php/files/d03e5ca98777b12b1e3de31fdfb38b99/12229739380.pdfIn PDF document text
    • http://conwaychristian.org/wp-content/plugins/formcraft/file-upload/server/content/files/161455c622a172---40018664278.pdfIn PDF document text
    • https://esvigo.com/upload/files/21618008526.pdfIn PDF document text
    • https://luckysurface.itweald.com/uploads/files/613e16c76772b.pdfIn PDF document text
    • https://merlak.ru/userfiles/file/zufuzenojovawexalu.pdfIn PDF document text

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