Malicious PDF — malware analysis report

Static analysis result for SHA-256 cb0886a33eaba50e…

MALICIOUS

PDF

61.0 KB Created: 2021-09-12 15:28:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-04
MD5: bbf1b709ce901c7f1523e5e297c84f63 SHA-1: 3b2f2194d9bff67974833d932660450fc6e0600e SHA-256: cb0886a33eaba50e3bca4656622a69fcb2dfe95d2994a6ceb514c180b4b22c39
132 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm and contains embedded JavaScript. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5565

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://partnermind.cz/images/files/rululepikavusabozatisor.pdf In PDF document text
    • http://www.gesas.it/media/mailinglist/file/19411299003.pdfIn PDF document text
    • http://doradcyprawni.com/images/pliki/wagoxumulebifojojuxavis.pdfIn PDF document text
    • http://www.kizkulesikizogrenciyurdu.com/public/ckfinderuploads/files/lilef.pdfIn PDF document text
    • https://izr.fr/files/19410507626.pdfIn PDF document text
    • http://www.euro-fly.eu/userfiles/files/87864028689.pdfIn PDF document text
    • http://www.kocay.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/16131f44c4babb---mulikavalefifugileguk.pdfIn PDF document text
    • https://badrivishal.com/media/19805791114.pdfIn PDF document text
    • http://icr34.fr/icr/icr34.fr/www/files/files/nelofexebivojanavoli.pdfIn PDF document text
    • https://aynispirit.nl/userfiles/file/53421629086.pdfIn PDF document text
    • https://sunridgecorp.com/uploads/files/202109101843156861.pdfIn PDF document text
    • http://studioarchperissinotto.eu/userfiles/files/37585660272.pdfIn PDF document text
    • http://originalbau.hu/imagesfiles/xezoxuwa.pdfIn PDF document text
    • http://tinhdauvietnam.vn/upload/files/konilazikozitenategozut.pdfIn PDF document text
    • http://pegasomeeting.medcoast.net/ckfinder/userfiles/files/69819039505.pdfIn PDF document text
    • https://poojaindiangrill.com/nbloom/fckuploads/file/74752774592.pdfIn PDF document text
    • http://fratellilongoni.com/userfiles/files/10876500690.pdfIn PDF document text
    • http://www.argentum.com/wp-content/plugins/super-forms/uploads/php/files/85q0282cgns5t424cj6248c3ro/36518833782.pdfIn PDF document text
    • http://acupunctuuryao.nl/ckfinder/userfiles/files/tilurixaposakudarulaxipi.pdfIn PDF document text
    • https://barcelonacentremedic.cat/files/galeria/files/futomodofovoj.pdfIn PDF document text
    • http://mya1fc.com/files/ckuploads/files/36835914763.pdfIn PDF document text
    • http://epoch-making.jp/js/upload/files/94235668712.pdfIn PDF document text
    • http://chanhbon.vn/media/ftp/file/50170570679.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/LPIa9PGmDLg/uplcv?utm_term=how+to+turn+off+mms+messages+on+androidPDF link annotation