Malicious PDF — malware analysis report

Static analysis result for SHA-256 1b1a85b0d70f6c91…

MALICIOUS

PDF

63.5 KB Created: 2021-09-23 10:21:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: 03138b6fee1a03c983e2ee44e8ad87a2 SHA-1: 546fff464b1666a2c1371efd95646daa58c52d62 SHA-256: 1b1a85b0d70f6c912957f69100307afea9729a51de8d71cc92d583aee5c93d0c
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF was flagged by ClamAV as Pdf.Phishing.Trojan and an ML classifier indicated maliciousness. It contains numerous embedded URLs, many pointing to disposable hosting or compromised CMS upload directories, suggesting a link farm designed to redirect users to malicious content or phishing sites. The presence of external URIs and link farm heuristics strongly indicates a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6403

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 https://irlanc.ru/uplcv?utm_term=milenge+milenge+full+movie+download PDF link annotation
    • http://design-klasse.de/ckfinder/userfiles/files/kanuj.pdfIn PDF document text
    • http://terezszilvia.com/images/uploaded/file/17151756503.pdfIn PDF document text
    • http://mgtofubbq.com/uploads/files/pukewovuluwasidado.pdfIn PDF document text
    • http://keramann.ru/uploads/files/6047144527.pdfIn PDF document text
    • http://shiraz.sk/ckfinder/userfiles/files/78265788288.pdfIn PDF document text
    • http://xn--e42bt3l.net/upfile/files/67600089637.pdfIn PDF document text
    • http://akbmodel.com/wp-content/plugins/formcraft/file-upload/server/content/files/16147e195a27cc---13553804799.pdfIn PDF document text
    • http://spostojow.pl/userfiles/file/pujuwedubokib.pdfIn PDF document text
    • https://bucatariizidite.ro/printuri-fi/files/wigidabikupapovozos.pdfIn PDF document text
    • http://brenna-ski.pl/userfiles/file/53289180933.pdfIn PDF document text
    • http://www.maoles.com/wp-content/plugins/formcraft/file-upload/server/content/files/161460f0291934---suzev.pdfIn PDF document text
    • http://e-store-sys.com/userfiles/file/muxiwebusotudiraki.pdfIn PDF document text
    • http://reclaimsplus.com/wp-content/plugins/super-forms/uploads/php/files/01ae64919997b63423ef6c58dea54169/93053648390.pdfIn PDF document text
    • http://www.jesuseslaroca.org/wp-content/plugins/formcraft/file-upload/server/content/files/1614c10f5eb979---82619521121.pdfIn PDF document text
    • https://leresto-niort.fr/images/userfiles/files/dibotivawajelisamewebo.pdfIn PDF document text
    • http://grafitym.kz/files/file/38281320196.pdfIn PDF document text
    • https://portalkucharski.pl/app/webroot/media/files/55090218113.pdfIn PDF document text
    • http://raduzhniy.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614aedd0cbfde---rifusos.pdfIn PDF document text
    • http://palakkadtourism.in/ckfinder/userfiles/files/13891993860.pdfIn PDF document text
    • http://sarigol.kr/userData/ebizro_board/file/vepujugugimu.pdfIn PDF document text
    • http://hasicimosnov.cz/foto/Image/file/47630911126.pdfIn PDF document text
    • http://zhatuogz.com/uploadfile/file/96894072887.pdfIn PDF document text
    • https://drakbera.com/ckeditor/ckfinder/userfiles/files/gisaxorodaxitugizu.pdfIn PDF document text
    • http://xn----7sbakn3aoflleitf3m6a.xn--p1ai/userfiles/file/24871678023.pdfIn PDF document text
    • http://rayocazar.com/images/elfinder-1.1/files/file/vusesiwifipanerakolojafu.pdfIn PDF document text

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