Malicious PDF — malware analysis report

Static analysis result for SHA-256 dbfca67efb3a6d3a…

MALICIOUS

PDF

44.2 KB Created: 2021-09-30 10:48:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23
MD5: beef14e6827583ce7c5a5bd62a7fa2a8 SHA-1: b6d5f51ee2ff28e9c8a15d7743196649ff592298 SHA-256: dbfca67efb3a6d3a5c8cb3e218def88b69ed6b5ceb30c473a6a41cf29a3807f9
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was identified as malicious by ML classifiers and ClamAV, specifically flagged as a phishing trojan. It contains numerous embedded URLs, many pointing to PDF files, and one heuristic indicates it's a link farm on disposable hosting. The document body is heavily obfuscated, but the presence of external URIs and the link farm heuristic suggest an attempt to redirect users to malicious sites, likely for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7887

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://nayyaralidada.net/alpha/ckfinder/userfiles/files/33798676206.pdf In PDF document text
    • http://gibkrakow.pl/uploads/files/pubogofijofob.pdfIn PDF document text
    • http://tiendanatacion.com/noticias/files/83320558575.pdfIn PDF document text
    • http://ippinnudon.com/uploads/files/dojilubowewesoxoluvarig.pdfIn PDF document text
    • http://tlumacz-francuskiego.pl/userfiles/file/detasit.pdfIn PDF document text
    • http://businessvaluationapp.com/fck_files/file/7515297456.pdfIn PDF document text
    • http://www.tsahimmongol.com/uploads/images/files/58798463066.pdfIn PDF document text
    • http://www.tobywells.org/media/fckdir/file/tawumosixenerebikegipoma.pdfIn PDF document text
    • https://okul.gencreklamajansi.com/uploads/files/nivepefekaxemubosivusibap.pdfIn PDF document text
    • https://lllk.ru/wp-content/plugins/super-forms/uploads/php/files/b2c878af6057ccd518b71f7f3c70e60e/josorosabepim.pdfIn PDF document text
    • http://kochamsushi.pl/UserFiles/file/kumelokoxej.pdfIn PDF document text
    • http://citlak.de/admin/UserFiles/file/runutupok.pdfIn PDF document text
    • http://linpus.com/app/webroot/userfiles/files/siledolikotagawunuf.pdfIn PDF document text
    • http://teifsepahan.com/files/file/77008961729.pdfIn PDF document text
    • http://kayapalinakliyat.net/file/keluvunur.pdfIn PDF document text
    • https://medtek.vn/storage/file/vopedepefuliduviso.pdfIn PDF document text
    • http://artsar.pl/userfiles/file/37812286641.pdfIn PDF document text
    • http://infosierra.es/images/editor/xupobizobiduvidavejeveji.pdfIn PDF document text
    • https://hogies.com/includes/template/uploads/file/banekumojexobiwud.pdfIn PDF document text
    • http://www.korayozelguvenlik.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613e25cea3b55---42907472732.pdfIn PDF document text
    • https://gagiongvitgiong.com/ckfinder/userfiles/files/mikumugezewulotirakupi.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BkSY9tpko7c/uplcv?utm_term=fifa+18+mobile+mod+apkPDF link annotation