Malicious PDF — malware analysis report

Static analysis result for SHA-256 c0a9751b9be4e15a…

MALICIOUS

PDF

43.1 KB Created: 2021-09-21 15:24:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 44b0440495574e098c1d078e9ee7dcc7 SHA-1: 41a7475ecbb5dd4edaff55d0a2d3d65c0b7d19c2 SHA-256: c0a9751b9be4e15a484c645b0ca7f9bc732ae1e158278928598298b4c77fae1b
132 Risk Score

Malware Insights

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

The sample contains embedded JavaScript and multiple external URIs, indicating it is designed to redirect users to potentially malicious websites. The PDF_SEO_DISPOSABLE_LINK_FARM heuristic and the large number of extracted URLs suggest a link farm or phishing campaign. ClamAV detection further supports its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6964

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://pistant.ru/uplcv?utm_term=voice+changer+clownfish+mac PDF link annotation
    • http://citygclub.com/ckupload/files/59853394171.pdfIn PDF document text
    • http://antik-cafe-bergen.de/wp-content/plugins/formcraft/file-upload/server/content/files/16141ed91a3c47---74844492452.pdfIn PDF document text
    • http://doorsatyrau.com/ckfinder/userfiles/files/nanebewitagubudarunarem.pdfIn PDF document text
    • http://cserepakcio.hu/xdata/file/88292962212.pdfIn PDF document text
    • http://hamdannepal.com/userfiles/file/61507270334.pdfIn PDF document text
    • http://cctsw.net/whly/up_files/FCK/file/20210918_123027_200.pdfIn PDF document text
    • http://aven.su/userfiles/file/nuguxuz.pdfIn PDF document text
    • http://www.thunderesp.com/ckfinder/ckfinder.htmlfiles/luvimeluvib.pdfIn PDF document text
    • http://electric-kernbichler.at/zodadetil.pdfIn PDF document text
    • http://gearonlaw.net/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/kuwezuno.pdfIn PDF document text
    • https://asiquim.com/ckfinder/userfiles/files/lolixikekitez.pdfIn PDF document text
    • https://miaousland.fr/ckfinder/userfiles/files/wetogawaka.pdfIn PDF document text
    • https://www.idd.no/ckfinder/userfiles/files/83189192670.pdfIn PDF document text
    • http://gfk-schwimmbad.de/i/File/zasomevat.pdfIn PDF document text
    • https://yocarbroker.com/upload/ckfinder/files/28123083965.pdfIn PDF document text
    • https://tecnomatec.cl/upload/file/depebapebekazedeviwano.pdfIn PDF document text
    • https://textosl.com/upload/editor/file/dokeriwubetapesolema.pdfIn PDF document text
    • http://willettelaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/tutosavero.pdfIn PDF document text
    • https://gameadvisers.com/js/new/fckeditor/userfiles/file/9386981352.pdfIn PDF document text
    • http://debeleven.net/UserFiles/File/21506979072.pdfIn PDF document text
    • http://pizzeriagiganti.ro/imagini_ws/44721782333.pdfIn PDF document text
    • https://wanfutemple.urwaydesign.com/data/file/userfiles/files/31503274940.pdfIn PDF document text
    • http://compie.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16146d279c936e---parigakiro.pdfIn PDF document text
    • http://raczpalinka.hu/userfiles/file/73942947906.pdfIn PDF document text
    • https://inprovitbolivia.com/ckfinder/userfiles/files/wonekidosudugos.pdfIn PDF document text

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