Malicious PDF — malware analysis report

Static analysis result for SHA-256 56b0a1d833b1c71c…

MALICIOUS

PDF

44.3 KB Created: 2021-09-11 15:55:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: dd0133a952cd27777d2cb93ec6f19f28 SHA-1: 8e08f5c5cf1d0245b004d1859fc6b95290b7388e SHA-256: 56b0a1d833b1c71ce8184403f78e9764a4568b19612413a1eabe0b5b1d1ebb4b
132 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The file contains embedded JavaScript and numerous external URIs, suggesting it's designed to redirect users to potentially harmful websites. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' further supports this, indicating a tactic to obscure malicious links within a large number of disposable domains.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7422

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
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://www.alitec.es/js/ckfinder/userfiles/files/tatikusujavikakexinizi.pdf In PDF document text
    • http://jcpingie.be/public/files/19616788624.pdfIn PDF document text
    • http://bephoangdung.vn/uploads/ckfinder/files/26645497199.pdfIn PDF document text
    • https://bimore.vn/webroot/img/files/53032598438.pdfIn PDF document text
    • http://nature-revive.org/files/file/54997054547.pdfIn PDF document text
    • http://www.cerathai.com/image/upload/File/57000831579.pdfIn PDF document text
    • http://stacjaregeneracja.pl/userfiles/file/13801162990.pdfIn PDF document text
    • http://rnralpha.cz/res/file/5483225412.pdfIn PDF document text
    • https://minlinart.com/archive/upload/files/dinebe.pdfIn PDF document text
    • http://www.1atlanticfunding.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613189451aff7---veworojabekunonos.pdfIn PDF document text
    • https://normec-cm.com/ckfinder/userfiles/files/84720843226.pdfIn PDF document text
    • http://vitanova-cattery.com/upload/file/vurepokomoxez.pdfIn PDF document text
    • http://zssadkowice.pl/pliki/16708062953.pdfIn PDF document text
    • http://srub-servis.ru/userfiles/file/11596859307.pdfIn PDF document text
    • https://i-chat.tw/js/ckfinder/userfiles/files/21186208834.pdfIn PDF document text
    • http://www.reroofingbrisbaneqld.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1613be01327cdd---wolowogaluvarevezaxe.pdfIn PDF document text
    • http://apexibd.com/uploads/fck_uploads/file/viriguniwosijewefizugafi.pdfIn PDF document text
    • http://internationalnetworksolutions.net/files/In PDF document text
    • http://sdtrafficticketlawyer.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/72372044705.pdfIn PDF document text
    • http://alphamarino.kz/images/news/file/laxipixib.pdfIn PDF document text
    • http://iknow.pl/files/file/pesaxubegabe.pdfIn PDF document text
    • http://dsraxys.com/uploads/komazifinibip.pdfIn PDF document text
    • http://chongthamnguoc.vn/img/files/45126836984.pdfIn PDF document text
    • http://impactpluslearning.com/ckfinder/userfiles/files/fapapawije.pdfIn PDF document text
    • https://tort-art.ru/userfiles/file/77290631489.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1KS0DP0cxss/uplcv?utm_term=honor+pad+5+updatePDF link annotation

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