Malicious PDF — malware analysis report

Static analysis result for SHA-256 eca38250096615fe…

MALICIOUS

PDF

57.1 KB Created: 2021-06-20 08:51:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 20b4411a27bfbea28918719769e946c3 SHA-1: b9c87022e3c74ccf826d6abc762ff7385205ba97 SHA-256: eca38250096615feb2034758ea5be67b097d4121432362aa3d0d3003adebb823
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains a link farm with numerous URLs hosted on potentially compromised or disposable domains, suggesting an attempt to redirect users to malicious content. The presence of multiple PDF_SEO_DISPOSABLE_LINK_FARM and PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM heuristics further supports this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6973

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://kaowei.tw/image/files/20210603_105054.pdf In PDF document text
    • http://www.alwaysflorida.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cb09158eac4---44284938948.pdfIn PDF document text
    • https://balbok.net/admin/ckfinder/userfiles/files/68631903295.pdfIn PDF document text
    • http://brandnewgoods.net/userfiles/file/30565435903.pdfIn PDF document text
    • http://kaies.cn/upfiles/file/54975181963.pdfIn PDF document text
    • https://swotin.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608850d67b0b7---74023320206.pdfIn PDF document text
    • http://scamps.biz/userfiles/file/74640015921.pdfIn PDF document text
    • http://akcjonariusz.com/UserFiles/file/86293444378.pdfIn PDF document text
    • http://novaserv.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b7b1308fedd---tosokanitebika.pdfIn PDF document text
    • https://autoandtruckrepair.net/nbloom/fckuploads/file/wujokepozupuluti.pdfIn PDF document text
    • http://studiobaldizzone.com/userfiles/files/92459479557.pdfIn PDF document text
    • https://k9-warrior.com/wp-content/plugins/super-forms/uploads/php/files/5191obra4gb6tveh2i8ao3e6qq/wenapuporovugodatar.pdfIn PDF document text
    • http://www.finanzanlagen-honorarberatung.de/wp-content/plugins/formcraft/file-upload/server/content/files/160779dbb2c911---juresitefip.pdfIn PDF document text
    • http://www.movingintofreedom.com/wp-content/plugins/formcraft/file-upload/server/content/files/16073c1e8423a2---gazagizutumaluzimudewunuf.pdfIn PDF document text
    • http://ahlhy.com/uploads/file/030837171693.pdfIn PDF document text
    • https://www.davinci.dk/wp-content/plugins/formcraft/file-upload/server/content/files/160720abf5748a---14475946967.pdfIn PDF document text
    • http://finpacecuador.com/userfiles/file/29279610113.pdfIn PDF document text
    • https://www.gs-gleichmann.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a7a6a772554---jazejiwidujoj.pdfIn PDF document text
    • https://www.auditek.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160c5123c39b22---95240274357.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/FevRqgeaUVY/uplcv?utm_term=yeto+vellipoyindi+manasu+online+watchPDF link annotation

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