Malicious PDF — malware analysis report

Static analysis result for SHA-256 ff6669cee1d183e4…

MALICIOUS

PDF

52.8 KB Created: 2021-09-18 04:55:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 7d41df68ad3210a8f83bafb94b2251df SHA-1: 867a14b8edb82a82e1ffe9b2d689bd46b912bb64 SHA-256: ff6669cee1d183e4b7314930e746cbd33d72c08f0193de32806ab319832de949
154 Risk Score

Malware Insights

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

The PDF contains a link farm directing to multiple compromised WordPress sites and other domains, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent, likely to lure users to malicious content or downloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9233

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://nucamsa.es/userfiles/files/52115598199.pdf In PDF document text
    • https://www.ibyservice.com/wp-content/plugins/super-forms/uploads/php/files/aa055a13463835bf82660ad7a8588b23/7068544854.pdfIn PDF document text
    • http://cmuniontravel.com/userfiles/file/vubufax.pdfIn PDF document text
    • http://fabrykakonwersji.pl/wp-content/plugins/super-forms/uploads/php/files/f897bbda59b059c48838cf9c08c1f221/48942080885.pdfIn PDF document text
    • http://akademia-jedenastka.pl/zdjecia/fck/file/97320131127.pdfIn PDF document text
    • http://scea.edu.mn/ckfinder/userfiles/files/rirezopudogidur.pdfIn PDF document text
    • http://meruzhankhachatryan.com/app/webroot/files/file/mipugom.pdfIn PDF document text
    • http://rulada.by/upload/editor/files/30877687773.pdfIn PDF document text
    • https://www.clinicaepilepsia.cl/ckfinder/userfiles/files/39946452805.pdfIn PDF document text
    • http://pavcargo.ru/wp-content/plugins/super-forms/uploads/php/files/2cd4cce0d4e52161a791c5412045cf5e/kakedebewigipumer.pdfIn PDF document text
    • http://xageunion.com/userfiles/file/pikukamuzoki.pdfIn PDF document text
    • http://vektor-bezpeki.com/userfiles/files/lixepu.pdfIn PDF document text
    • https://gencatakan.com/upload/file/vegezavamup.pdfIn PDF document text
    • https://ww150004.linebot.net/upfile/files/20210911185710.pdfIn PDF document text
    • https://raovat72.vn/uploads/news_file/nudorekitakun.pdfIn PDF document text
    • http://www.dogwoodagility.nl/ckfinder/userfiles/files/7683542204.pdfIn PDF document text
    • https://fobh.net/userfiles/files/vefagetal.pdfIn PDF document text
    • https://albizy.com/ckfinder/userfiles/files/lujivafuxebegi.pdfIn PDF document text
    • http://tinhdauvietnam.vn/upload/files/71205466266.pdfIn PDF document text
    • https://polinagerz.ru/wp-content/plugins/super-forms/uploads/php/files/9jnkgvegihdpt16bi2q94rvb9d/kavavis.pdfIn PDF document text
    • http://bbbo.handyfriendship.com/upload/files/raxorigojoletotobefiju.pdfIn PDF document text
    • http://www.museopizarra.com/ckfinder/userfiles/files/goxatatetasesagakaxoto.pdfIn PDF document text
    • http://energo-winstal.pl/userfiles/file/69235542352.pdfIn PDF document text
    • https://exam11.menapoint.com/app/webroot/upload/files/54714895298.pdfIn PDF document text
    • https://turismo-galicia.es/ckfinder/userfiles/files/felezava.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3vuEKuznOb8/uplcv?utm_term=kingsoft+for+androidPDF link annotation