Malicious PDF — malware analysis report

Static analysis result for SHA-256 053af92d21fd4219…

MALICIOUS

PDF

54.6 KB Created: 2021-09-08 22:10:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-03
MD5: 5404c44a6393306d7006093883caa3b5 SHA-1: ddc85077700a6289c1732280c757aa21f5fb6ac7 SHA-256: 053af92d21fd421982f890307714b722792db8b0dca54436ce944a47bd608d58
132 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external URIs, many of which point to disposable domains, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. The embedded JavaScript is likely used to facilitate the redirection or exploit vulnerabilities.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6099

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://trickapotisk.cz/webpagebuilder/ckfinder/userfiles/files/75138990578.pdf In PDF document text
    • http://szkolka-wiercioch.pl/files/file/37939760063.pdfIn PDF document text
    • http://scea.edu.mn/ckfinder/userfiles/files/26427822194.pdfIn PDF document text
    • http://kovofilm.cz/userfiles/file/10643103082.pdfIn PDF document text
    • https://alenakovalchuk.ru/wp-content/plugins/super-forms/uploads/php/files/2612dd56c9309e07267e2f72475d1712/88231181991.pdfIn PDF document text
    • https://patriciogaete.com/upload/file/27244485305.pdfIn PDF document text
    • http://handsonmontessoripk.com/userfiles/files/66962822560.pdfIn PDF document text
    • http://www.fd.ntou.edu.tw/ckfinder/userfiles/files/83660505804.pdfIn PDF document text
    • http://appli-veolia.net/ckfinder/userfiles/files/kukatexil.pdfIn PDF document text
    • http://telegid.tv/userfiles/files/walatavisuzak.pdfIn PDF document text
    • http://leoclubmarsala.it/userfiles/files/pabozilaxatenudunovofiza.pdfIn PDF document text
    • http://bapassamarinda.id/assets/ckfinder/core/connector/php/uploads/files/vejuwivatodezusamezun.pdfIn PDF document text
    • https://satellietgroep.nl/userfiles/files/ligobosomoxus.pdfIn PDF document text
    • http://asr-net.ru/uploads/files/35020787578.pdfIn PDF document text
    • https://linhquan-group.com/upload/ck/files/xowirapexanizimexarokato.pdfIn PDF document text
    • http://vanillasky-ch.com/images/files/tifuzebuxagunoz.pdfIn PDF document text
    • http://studiofantino.it/userfiles/files/63213492334.pdfIn PDF document text
    • http://www.cerel.eu/images/wyswig_images/file/51481346855.pdfIn PDF document text
    • http://gaishachuukobuhin.com/js/upload/files/22606342220.pdfIn PDF document text
    • http://waypl.pl/upload/File/kamufanozujawusekikodagem.pdfIn PDF document text
    • https://nanyangtextile.com/userfiles/file/33249917260.pdfIn PDF document text
    • http://e-sheremet.com/img/giboderilopumeka.pdfIn PDF document text
    • http://kirks-pool.com/wp-content/plugins/formcraft/file-upload/server/content/files/16137cfd154277---pekuf.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1xuhb7AK25c/uplcv?utm_term=movie+and+tv+apps+for+androidPDF link annotation

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