Malicious PDF — malware analysis report

Static analysis result for SHA-256 fe4767714a8d29cc…

MALICIOUS

PDF

63.5 KB Created: 2021-09-03 10:31:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: e2c530f438409aedcf07bbdd1dc82329 SHA-1: 49edf58b977f26886825f60bfffad22699d725a6 SHA-256: fe4767714a8d29cc99a0c1f6b6e69295386186877f0e8edb94883ff3e7aed39a
162 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains embedded JavaScript and numerous external links, many pointing to compromised CMS upload directories or disposable hosting. These elements suggest the file is designed to host and distribute malicious payloads or redirect users to phishing sites. The ClamAV detection as 'Pdf.Phishing.Trojan' further supports this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6379

Heuristics 6

  • 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.
  • 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://ketchas.ru/uplcv?utm_term=walmart+pharmacy+generic+drug+list+pdf PDF link annotation
    • http://cuuhoatudong.com/upload/files/31381826690.pdfIn PDF document text
    • https://hinodanang.com/uploads/image/files/54598288673.pdfIn PDF document text
    • http://thunderstar.cn/userfiles/file/20210722085046561697838.pdfIn PDF document text
    • https://ruiguoex.com/upfile/files/2021/07/05/tabamajunewawamuk.pdfIn PDF document text
    • https://refundsrefunds.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a85a41e3020---wukorixovafire.pdfIn PDF document text
    • https://gberwanda.com/gbe/useruploads/blogs/files/42269656853.pdfIn PDF document text
    • http://objetivovender.com/wp-content/plugins/formcraft/file-upload/server/content/files/16086c94ac9d59---85098264002.pdfIn PDF document text
    • http://phuwangnam.com/user_file/file/30285920495.pdfIn PDF document text
    • http://visualpaint.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607734b16643f---jilazumupobom.pdfIn PDF document text
    • http://bigyikesmedia.com/home/xtremweb/public_html/consultinstitute/web/upload/files/xeripoj.pdfIn PDF document text
    • http://aircond.md/upload_fck/file/mopukasoraj.pdfIn PDF document text
    • http://www.luminicaambiental.com/wp-content/plugins/formcraft/file-upload/server/content/files/161294e9c249a6---50263434189.pdfIn PDF document text
    • https://carthink.org/wp-content/plugins/formcraft/file-upload/server/content/files/160d9dc7613f31---80384121740.pdfIn PDF document text
    • http://pension-erlkoenig.de/img/editor/file/gupalale.pdfIn PDF document text
    • https://turkihale.com/userfiles/file/fakiliguzusitikejad.pdfIn PDF document text
    • https://alphacleanwashing.com/wp-content/plugins/super-forms/uploads/php/files/d377c400b3f3eeade93e0652db807db3/5027316542.pdfIn PDF document text
    • https://www.skyline-recruiting.com/wp-content/plugins/super-forms/uploads/php/files/6bd4673e4bb0671e527327130b116b4c/74595282057.pdfIn PDF document text
    • http://pphjako.pl/userfiles/file/76066668151.pdfIn PDF document text
    • https://guenangequitation.fr/www/site/js/ckfinder/userfiles/files/91838334727.pdfIn PDF document text
    • https://ville-saintleonard.fr/pdf/2967500699.pdfIn PDF document text
    • https://aspaeng.com/files/image/files/pubuxesobesedigutivojigo.pdfIn PDF document text
    • https://anzmrrn.org/wp-content/plugins/formcraft/file-upload/server/content/files/1607ddd3f8cc71---nuludoxaxi.pdfIn PDF document text
    • http://staresecurity.com/userfiles/file/mevurixigisupam.pdfIn PDF document text
    • https://clinicscrm.com/img/files/voxofenanowasowadaler.pdfIn PDF document text

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