Malicious PDF — malware analysis report

Static analysis result for SHA-256 0057ecffa8bccbce…

MALICIOUS

PDF

54.4 KB Created: 2021-09-05 12:34:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: c8749382bd95b76d64d234bdc621c88b SHA-1: 463285116b408b7ba510b461a02810bccf8c8b26 SHA-256: 0057ecffa8bccbcef7798d0a775632051020c6236ede8a63cd23ca479ffba399
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The file was detected as a malicious PDF by ClamAV and ML classifiers, exhibiting characteristics of a link farm. Multiple heuristics indicate it points to compromised CMS uploads and disposable hosting, suggesting an attempt to lure users to malicious sites. The embedded URLs, while numerous, do not appear to directly execute code but serve as a redirection mechanism, likely for phishing or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5146

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://avandcie-automation.com/ckfinder/userfiles/files/laputaxaxugos.pdf In PDF document text
    • https://cottonweb.net/userfiles/file/mekuvo.pdfIn PDF document text
    • https://latework.cz/soubory/fotadutubegifonipaden.pdfIn PDF document text
    • https://bbensonmft.com/wp-content/plugins/super-forms/uploads/php/files/18b965c6f1750d5fa92f5875fa9b02cf/rejefud.pdfIn PDF document text
    • http://chistogood.ru/admin/ckfinder/userfiles/files/nadofosukozagizowubo.pdfIn PDF document text
    • http://cargo3030.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160c6049bf0345---21360599954.pdfIn PDF document text
    • http://0vote.com/ckfinder/files/duderof.pdfIn PDF document text
    • http://pneusmarene.it/images/file/nixuranososukuza.pdfIn PDF document text
    • http://originalcheck.it/public/img_admin/file///suritebajefupexawomofo.pdfIn PDF document text
    • https://indacphuc.com/wp-content/plugins/super-forms/uploads/php/files/pv78ova45m4auq64d7ccm4remg/nemujupujubeka.pdfIn PDF document text
    • http://faradtvandor.hu/picture/userfiles/file/5567657994.pdfIn PDF document text
    • https://www.criteriainvest.com.br/wp-content/plugins/super-forms/uploads/php/files/vue7be63d7j9f72j9vtldchs58/16573761807.pdfIn PDF document text
    • http://phongkhamthienhoa.org/images/files/jowipa.pdfIn PDF document text
    • https://www.potravinyav21.cz/ckfinder/userfiles/files/kegakeke.pdfIn PDF document text
    • http://animationcoach.com/userfiles/file/30384621975.pdfIn PDF document text
    • https://bunyaminerdemir.com/resimler/files/zibowopil.pdfIn PDF document text
    • https://ercrs.org/wp-content/plugins/super-forms/uploads/php/files/2ke0r3ba1p9glifunoegnouvf3/zosog.pdfIn PDF document text
    • http://paradisetnl.com/FileData/ckfinder/files/20210712_0BB45CF31312DFE3.pdfIn PDF document text
    • http://botosani.ro/img/uploads/file/21026363807.pdfIn PDF document text
    • https://amezdigital.com/wp-content/plugins/super-forms/uploads/php/files/6ca27c53531414957461a190530efea1/putapi.pdfIn PDF document text
    • http://beiwendq.com/userfiles/file/vasinexalolupiranozav.pdfIn PDF document text
    • http://ucity69.com/clients/861769/File/88735292733.pdfIn PDF document text
    • http://rsst77.ru/upload/files/xujinawegunu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/FevRqgeaUVY/uplcv?utm_term=solar+system+worksheets+for+grade+1PDF link annotation

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