Malicious PDF — malware analysis report

Static analysis result for SHA-256 3b0933160ea3f47b…

MALICIOUS

PDF

62.5 KB Created: 2021-10-07 13:42:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: cef446121a55f8ab101b76f6c7beeb18 SHA-1: 87e02b1e044347bf1c3467f6f0b902c340d52d6f SHA-256: 3b0933160ea3f47b95da14475dde683cea2055cbebd51ce1af36b12d50888a58
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The sample was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. Numerous embedded URLs were extracted, pointing to a link farm strategy designed to redirect users to potentially harmful sites. The PDF_SEO_DISPOSABLE_LINK_FARM heuristic further supports this, suggesting the document's primary purpose is to host a large number of links on disposable domains.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8029

Heuristics 4

  • 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.
  • 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://pixomot.ru/uplcv?utm_term=chef+salad+nutrition+facts PDF link annotation
    • https://infoenergie-loire.org/userfiles/file/bamisubegamar.pdfIn PDF document text
    • http://baharemadinah.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614a1d0b006a8---jakujadigod.pdfIn PDF document text
    • https://gimenezricarte-deltabogados.com/ckfinder/userfiles/files/tegewasubipevosejefe.pdfIn PDF document text
    • http://jungvassar.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/zewitatuziluzirenoxos.pdfIn PDF document text
    • https://www.iieng.org/editor/ckfinder/userfiles/files/fusifisasudoponagekib.pdfIn PDF document text
    • https://mfdesign.hu/files/file/jozawekaf.pdfIn PDF document text
    • http://sedaciesupravy.sk/media/file/68125959393.pdfIn PDF document text
    • http://imbirimbir.ru/files/88678486038.pdfIn PDF document text
    • https://www.lesson-online.org/wp-content/plugins/super-forms/uploads/php/files/lqqes75cjhmce9ji168kv65c41/tizizinufejiwofuj.pdfIn PDF document text
    • http://arniuniversity.in/ci/userfiles/files/29494103391.pdfIn PDF document text
    • https://youkuvpn.com/upload/files/guregevoxefuxigekin.pdfIn PDF document text
    • http://zeshengtecphar.com/UploadFiles/FCKeditor/20211006155542.pdfIn PDF document text
    • https://lotte-ppta.com/beta/assets/file/namadox.pdfIn PDF document text
    • http://berallebags.com/UploadFiles/FCKeditor/20211001142714.pdfIn PDF document text
    • http://tuvanluatdanang.com/upload/ck/files/lexukobu.pdfIn PDF document text
    • https://kolegium.inaheart.org/upload/files/rowovosupebofovu.pdfIn PDF document text
    • http://thaicockstar.com/ckfinder/userfiles/files/35918298204.pdfIn PDF document text
    • http://parcroyale.hk/userfiles/rupetivinutuvovul.pdfIn PDF document text
    • http://fu-xin.tw/uploads/files/202109120804394368.pdfIn PDF document text
    • https://siltri.com/fck_upload/file/73596833912.pdfIn PDF document text
    • https://www.champagne-cornevin.fr/ckfinder/userfiles/files/56938333170.pdfIn PDF document text
    • https://giridhareye.org/ckfinder/userfiles/files/fizevuridaxoz.pdfIn PDF document text
    • https://badanie-wody.pl/galeria/file/dudidoporu.pdfIn PDF document text
    • http://giasuminhtam.com/Images_upload/files/95566205139.pdfIn PDF document text
    • https://bunianco.com/other_files/File/15963714464.pdfIn PDF document text
    • http://lsneotek.com/ckupload/files/muvivob.pdfIn PDF document text

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