Malicious PDF — malware analysis report

Static analysis result for SHA-256 ca8fb20333fef91b…

MALICIOUS

PDF

55.8 KB Created: 2021-09-21 23:27:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: 2fa7f1ce25ba6d0ef3c9ede312501547 SHA-1: 84873fc52e9ab7a80b15236bc3a25c956dab0037 SHA-256: ca8fb20333fef91bb7b49ec3fb27436dcd8401aa555cafbb555fbe84954b5d5b
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. It contains numerous embedded URLs, many of which point to disposable hosting or are part of a link farm, suggesting a phishing or malware distribution scheme. The presence of external URIs and embedded URLs strongly suggests the document is designed to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8456

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://pixomot.ru/uplcv?utm_term=www+six+six+usa+2020 PDF link annotation
    • http://andreaslasnik.com/data/files/30704642400.pdfIn PDF document text
    • http://tikatalog.sk/_files/file/zozebedojuretopusebazaf.pdfIn PDF document text
    • http://hoteldanang.vn/uploads/images/files/rikugevozekosatokiwivir.pdfIn PDF document text
    • http://www.kowel.com/ckfinder/userfiles/files/1631027766.pdfIn PDF document text
    • http://www.anclupnapoli.it/userfiles/file/didipifidefulowuvileligaj.pdfIn PDF document text
    • https://www.stock2morrow.com/ckfinder/userfiles/files/43948571897.pdfIn PDF document text
    • http://patrick-vallot.com/upload/files/45070350804.pdfIn PDF document text
    • https://eletmodguru.hu/files/files/57708751352.pdfIn PDF document text
    • http://tecs4.com/intranet/ckfinder/userfiles/files/kuxivutas.pdfIn PDF document text
    • http://nachhilfeschule.havonix.com/ckfinder/userfiles/files/vuwinodiw.pdfIn PDF document text
    • http://a2kat.ru/userfiles/file/58376971762.pdfIn PDF document text
    • http://asu78.ru/userfiles/file/28553365580.pdfIn PDF document text
    • https://cornwallstaffagency.com/userfiles/file/67691471068.pdfIn PDF document text
    • https://promenade-perpignan.com/userfiles/file/87539836214.pdfIn PDF document text
    • http://kosmonautika.ee/ckfinder/userfiles/files/rudodepu.pdfIn PDF document text
    • http://lso-msm.fr/userfiles/file/ritawuligij.pdfIn PDF document text
    • https://linardi.ru/files/file/43781747780.pdfIn PDF document text
    • https://xn--64-mlcufjjaii0l.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/792c26fbbfc6f1c77534867166ee9720/69201641046.pdfIn PDF document text
    • http://nfrostov.ru/upload/files/bexesagijapad.pdfIn PDF document text
    • https://djhelaly.com/wp-content/plugins/super-forms/uploads/php/files/707bc0776626c6216e4c69fcaaf921bc/mibexoguwuketereleteri.pdfIn PDF document text
    • https://needletherapy.eu/upload/file/gewojelebizizaj.pdfIn PDF document text
    • https://dom4m.lv/userfiles/files/rogaxovixeso.pdfIn PDF document text
    • http://keletunderground.hu/images/uploaded_pics/file/topipudixugajuvidalu.pdfIn PDF document text
    • https://homeuu.biz/upload/ckeditor/pages/files/wowuxoremivezovizajaba.pdfIn PDF document text
    • https://leonardscopysystems.com/home/leonards/public_html/ckfinder/userfiles/files/41237154486.pdfIn PDF document text