Malicious PDF — malware analysis report

Static analysis result for SHA-256 c1f738f1624f575a…

MALICIOUS

PDF

46.8 KB Created: 2021-09-26 17:46:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-20
MD5: 61da64bedfc9da8bab8fd8161a030e7a SHA-1: 12420764ca6fc93251d9a795d511c4fffa3cb992 SHA-256: c1f738f1624f575a50accc0830c9dbf58e430a4a502066977a55e9ee0d9dd32e
132 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript, which is a common technique for executing malicious code within documents. The heuristic firings indicate that this JavaScript is likely used to redirect the user to a link farm, as evidenced by the numerous external URIs and the 'PDF_SEO_DISPOSABLE_LINK_FARM' alert. ClamAV also detected this file as a phishing trojan, further supporting its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5549

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://longruiglass.com/ckfinder/userfiles/files/20210913_235855.pdf In PDF document text
    • http://charugarware.com/DEVELOPMENT/charu_garware/uploaded/userfiles/file/39047172450.pdfIn PDF document text
    • https://eecpowerindia.com/codelibrary/ckeditor/ckfinder/userfiles/files/56473623578.pdfIn PDF document text
    • http://romento.com/uploaded_files/userfiles/files/kedabizufubive.pdfIn PDF document text
    • http://www.naturhalles.fr/fckeditor/userfiles/file/zemumemopelesu.pdfIn PDF document text
    • https://homestayhoian.vn/uploads/image/files/74381727716.pdfIn PDF document text
    • https://nhahangthanghuong.com/uploads/files/supobifamomiranewej.pdfIn PDF document text
    • http://mdbim.pl/ubezpiecz/obrazy/file/tisoxeseruxopeperagatevol.pdfIn PDF document text
    • http://kirche-treuen.de/UserFiles/File/gavijovepuwutitili.pdfIn PDF document text
    • https://hotararicedo.ro/files/files/didelowusabakafofu.pdfIn PDF document text
    • http://bolshunoff.ru/images/wysiwyg/file/71685423004.pdfIn PDF document text
    • http://2446665a.ru/ckfinder/userfiles/files/denakudonibu.pdfIn PDF document text
    • https://myparrotfood.com/user_files/files/758385412.pdfIn PDF document text
    • https://cpc-serbia.org/js/files/zelisabik.pdfIn PDF document text
    • http://www.ks-klinika.ru/ckfinder/userfiles/files/tukipuxadisid.pdfIn PDF document text
    • http://8njl.com/userfiles/files/4467030109.pdfIn PDF document text
    • http://landpas.pl/upload/file/15066858344.pdfIn PDF document text
    • https://tidurmalam2.com/contents/files/19540899874.pdfIn PDF document text
    • https://linhngapt.vn/upload/files/gifuxetobokazakex.pdfIn PDF document text
    • https://njshore.drinkpoint.com/uploads/files/90382734361.pdfIn PDF document text
    • https://krygina40.ru/UserFiles/File/gizubajajurifuta.pdfIn PDF document text
    • http://gcoekmr.org/cukashmir/User_Files/imagefile/tejakowibegoluneduzesi.pdfIn PDF document text
    • http://xn--42-jlclgg6a3e.xn--p1ai/userfiles/file/68460806939.pdfIn PDF document text
    • https://hunghiephuylog.com/upload/files/fekobamater.pdfIn PDF document text
    • http://travellerisland.com/files/fimalaleni.pdfIn PDF document text
    • http://www.ashtralmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/16147d01ad5389---dadirilubusubonebanuwin.pdfIn PDF document text
    • https://autoskola-scp.com/files/70136567210.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/zMnd8XtcwSM/uplcv?utm_term=ghd+sports+app+pcPDF link annotation

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