Malicious PDF — malware analysis report

Static analysis result for SHA-256 3ab03421c651f04c…

MALICIOUS

PDF

64.0 KB Created: 2021-09-15 09:56:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 7d3f19fc0e03aaacfdf8fe4c2234c9dd SHA-1: ff558436f0c891fd3ddf8d2ca52c20802379ea49 SHA-256: 3ab03421c651f04c787d42c1608ca4f6ebc088b0ca0d467e139f3eda6482baca
132 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous links, many of which point to PDF files hosted on potentially disposable domains. The heuristic PDF_SEO_DISPOSABLE_LINK_FARM and ML_NYX_PDF_MALICIOUS firings, along with the ClamAV detection, strongly indicate malicious intent. The embedded JavaScript likely facilitates the redirection to these malicious links, which are designed to trick users into downloading further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8034

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 http://kahasat.cz/data/file/57008224626.pdf In PDF document text
    • https://bulgariapools.com/contents/files/53877508524.pdfIn PDF document text
    • http://sartor.ru/upload/files/48862228867.pdfIn PDF document text
    • http://videofilm-tv.ru/content/File/baxesesibakatuminobowetit.pdfIn PDF document text
    • http://jumpstart.mobi/ckfinder/userfiles/files/labeza.pdfIn PDF document text
    • http://pzhjintai.com/upload/files/suxalerimaserujob.pdfIn PDF document text
    • https://www.pferde-fuer-unsere-kinder.de/wp-content/plugins/formcraft/file-upload/server/content/files/16133c64603cda---20629520866.pdfIn PDF document text
    • https://ourcampuswindow.com/ckfinder/userfiles/files/3920401383.pdfIn PDF document text
    • http://m-camper.ru/ckfinder/userfiles/files/wowozobadorogotepapogal.pdfIn PDF document text
    • http://ngocminhcnc.com/demo_thietbimay_24_7/upload/files/21348425588.pdfIn PDF document text
    • http://autosvanbeek.nl/mindcms/js/ckf/userfiles/files/39851569136.pdfIn PDF document text
    • https://jmtours.co/aym_image/files/bakokaxowo.pdfIn PDF document text
    • http://madinagirls.com/easydo%20v2.00/files/uploads/tewajemurapomixizorijeriv.pdfIn PDF document text
    • http://cissi.it/userfiles/files/87078890950.pdfIn PDF document text
    • http://iccj.jp/images/uploads/fckeditor/file/12663467787.pdfIn PDF document text
    • http://wgadget.com/file_media/file_image/file/14357989844.pdfIn PDF document text
    • https://prosaison.fr/userfiles/files/rizuwopejonesegulugugakix.pdfIn PDF document text
    • http://falegnameriacastiglione.it/userfiles/files/64770558372.pdfIn PDF document text
    • http://teleinwestor.pl/userfiles/file/zarokepupoxolu.pdfIn PDF document text
    • http://aeusjtu.pretty-match.com/upload/files/kagadi.pdfIn PDF document text
    • http://mocphatreal.com/assets/images/ckfinder/files/1519460232.pdfIn PDF document text
    • http://studiotecnicobonoli.com/userfiles/files/95776498035.pdfIn PDF document text
    • https://careerexpo.alljobsinliberia.com/ckfinder/userfiles/files/xukej.pdfIn PDF document text
    • https://szamitogep-szerviz-javitas.hu/ckfinder/userfiles/files/tiwagerajekubawuk.pdfIn PDF document text
    • https://bilegt.mn/userfiles/files/kodewo.pdfIn PDF document text
    • http://krzysztofmalec.pl/gfx/fck/file/2182713774.pdfIn PDF document text
    • http://faisaltowel.com/survey/userfiles/files/bolajafafenufekorazukowef.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1xuhb7AK25c/uplcv?utm_term=patch+android+apkPDF link annotation

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