Malicious PDF — malware analysis report

Static analysis result for SHA-256 38ee89b2b331565b…

MALICIOUS

PDF

53.3 KB Created: 2021-09-12 16:13:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: e470735ec7f7f05bf188a23cfc0ee187 SHA-1: 6513185e90ae095e0f1c623f163acac1df820bb7 SHA-256: 38ee89b2b331565bb04b0e22fd43ba385622f303f96db925f5d8e56b449a971b
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by multiple heuristics as containing a link farm hosted on compromised CMS uploads, and ML classifiers also indicated maliciousness. The embedded URLs, such as http://claudiodauelsberg.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1613503ca989c2---30349003803.pdf, are likely part of a phishing or malware distribution scheme. Although no scripts were explicitly extracted, the PDF structure and URL patterns suggest an attempt to lure users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8534

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
  • 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://trainternational.in/wp-content/plugins/formcraft/file-upload/server/content/files/16139da8b64d01---fowipa.pdf In PDF document text
    • http://swhwsolution.it/ckeditor-ckfinder-integration/uploads/files/19874557202.pdfIn PDF document text
    • https://www.fecomerciomg.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/16138a89336e66---64712161839.pdfIn PDF document text
    • https://familienbilstrup.dk/ckfinder/userfiles/files/75230945668.pdfIn PDF document text
    • https://gservicepz.com/wp-content/plugins/super-forms/uploads/php/files/1895e03b369f78729424339053fdaf9d/19447533308.pdfIn PDF document text
    • http://claudiodauelsberg.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1613503ca989c2---30349003803.pdfIn PDF document text
    • http://leylatoprak.com/userfiles/file/54955011098.pdfIn PDF document text
    • http://defhjdr.friend-match.com/upload/files/takotuvularisunoluwigugo.pdfIn PDF document text
    • http://pngroup.pl/ckfinder/userfiles/files/kubawovejilofemin.pdfIn PDF document text
    • http://progfin.pl/userfiles/file/gezupav.pdfIn PDF document text
    • https://www.adom.biz.pl/ckfinder/userfiles/files/nelenunol.pdfIn PDF document text
    • http://ettermanenterprises.com/ckfinder/userfiles/files/ruvamovalekoxize.pdfIn PDF document text
    • https://uleshuzataruhaz.hu/files/file/juwelaxuseri.pdfIn PDF document text
    • https://totounited.com/contents/files/loxok.pdfIn PDF document text
    • http://tmacfashion.com/ckfinder/userfiles/files/64829402087.pdfIn PDF document text
    • http://architects-desk.com/uploadsfile/94195238645.pdfIn PDF document text
    • https://piti.leaddeehub.com/userfiles/files/6346991255.pdfIn PDF document text
    • http://combatkuntao.com/ckeditor/ckfinder/userfiles/files/tobabales.pdfIn PDF document text
    • http://infiniti.e-library.tw/uploads/files/ridozupufamorira.pdfIn PDF document text
    • http://etcpremium.com/userfiles/files/79677426114.pdfIn PDF document text
    • https://lorenzonimmigrationlaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612ec757eb2e2---34577940932.pdfIn PDF document text
    • http://xn--80akoseq9f.xn--p1ai/userfiles/file/liloraginoxixusew.pdfIn PDF document text
    • http://marktoby.com/akram/know_news/admin/userfiles/file/zadififutemazo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/zMnd8XtcwSM/uplcv?utm_term=game+xnxx+apkPDF link annotation

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