Malicious PDF — malware analysis report

Static analysis result for SHA-256 49da209bb91435c8…

MALICIOUS

PDF

62.6 KB Created: 2021-09-21 03:25:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 8c0f6e670d388ef2930153063500918f SHA-1: 3f2a87cb7699a3a0f246c080916f4ecec6654f2b SHA-256: 49da209bb91435c8cc8c22a265047ffb1810e2d157ebefaebd21587970db1e95
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ClamAV and an ML classifier, and exhibits characteristics of a link farm. Multiple heuristics indicate the PDF contains numerous links pointing to external resources, some hosted on compromised CMS uploads. The document body is heavily obfuscated, preventing a clear understanding of its specific lure, but the overall structure suggests it's designed to redirect users to potentially malicious content hosted on various domains.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7432

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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 http://yoron.net/up/files/nuxamapumaxumusiwesozulu.pdf In PDF document text
    • https://ldoris.com/upfile/files/20210910001340.pdfIn PDF document text
    • http://www.sun-green.eu/ckfinder/userfiles/files/79669736184.pdfIn PDF document text
    • http://franceplus.fr/userfiles/file/16669029076.pdfIn PDF document text
    • http://lncxjzxxw.com/upload_fck/file/2021-9-20/20210920083724387220.pdfIn PDF document text
    • https://daulte.ch/ckfinder/userfiles/files/riposa.pdfIn PDF document text
    • http://ageddfjtjgrade.pretty-match.com/upload/files/tobovobek.pdfIn PDF document text
    • http://sdes.in/uploads/gobubizusegapimim.pdfIn PDF document text
    • http://paneldeconsos.com/userfiles/file/melezexuxoginur.pdfIn PDF document text
    • http://strihaci.cz/userfiles/file/dopavuzodetagumekuzino.pdfIn PDF document text
    • https://www.espymetcalf.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613cab7bba665---givawotexizofiwevi.pdfIn PDF document text
    • https://ncfouting.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613291ccb35a1---xetulizuzi.pdfIn PDF document text
    • https://fnb-concepts.com/images/uploads/files/lusatetes.pdfIn PDF document text
    • http://www.its-dph.cz/admin/fckeditor/editor/userfiles/file/pusufoxekejo.pdfIn PDF document text
    • http://dabien.co.kr/wp-content/plugins/formcraft/file-upload/server/content/files/1613c448e0fac7---purelobowomurenobif.pdfIn PDF document text
    • https://xeroxexpres.cz/userfiles/file/13424524783.pdfIn PDF document text
    • https://aiwatopup.com/ckfinder/userfiles/files/37654690631.pdfIn PDF document text
    • http://aow.infogestnet.it/ckfinder/userfiles/files/20033448784.pdfIn PDF document text
    • http://angelascanu.it/uploads/file/63391102746.pdfIn PDF document text
    • https://xn----7sbabak5acz7byau.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/ce9134a0aa1295a09acb03a5df642dc9/lusifopafoxetuduxa.pdfIn PDF document text
    • https://chorland-dining.com/webroot/editor-uploads/files/jepijageranuxude.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3vuEKuznOb8/uplcv?utm_term=bring+it+on+movies+full+moviePDF link annotation
    • http://crossfit28.com.s125853.gridserver.com/siteuploads/editorimg/file/39340585199.pdfIn PDF document text

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