Malicious PDF — malware analysis report

Static analysis result for SHA-256 970c12b5f0d869ee…

MALICIOUS

PDF

49.7 KB Created: 2021-06-08 19:57:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: c39b77f5e57413d40661f6a5bb3b592a SHA-1: f8c07c569d433a5fd92e7fba3abe2b641a219d39 SHA-256: 970c12b5f0d869ee3918494cea39ab8f1c81f54dc9aa32ab519d39332dae27c5
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains numerous links to compromised WordPress upload directories and disposable hosting sites, suggesting a link farm designed to distribute malware or conduct phishing. The embedded URLs, such as 'https://pistant.ru/uplcv?utm_term=tubidy+mp3+mp4+download+free', are likely part of this malicious infrastructure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7360

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 https://pistant.ru/uplcv?utm_term=tubidy+mp3+mp4+download+free PDF link annotation
    • http://limpiasol.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a3cd95a24a0---19784143618.pdfIn PDF document text
    • http://www.ausafrica.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160a2dd27796cc---89718363851.pdfIn PDF document text
    • http://evabody.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16071b75769a96---39541145799.pdfIn PDF document text
    • https://vuaship.com/wp-content/plugins/super-forms/uploads/php/files/08u2ghfja8jk3n5jdgd5o0t1nl/28929860003.pdfIn PDF document text
    • https://drahmetbostanci.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c7985f1d38---dudevogum.pdfIn PDF document text
    • https://nnkcreations.com/userfiles/file/34514962542.pdfIn PDF document text
    • https://adbadog.com/wp-content/plugins/super-forms/uploads/php/files/332efd9745d8e0bf5a2c0e3d6c5157d2/gukinoba.pdfIn PDF document text
    • https://goldengrowers.com/wp-content/plugins/super-forms/uploads/php/files/71593005e73bededd6c9c057568e52a2/nulan.pdfIn PDF document text
    • https://accuratesearch.com/userfiles/file/96386964883.pdfIn PDF document text
    • https://tkpmission.org/wp-content/plugins/formcraft/file-upload/server/content/files/160982c2b3a1c5---karuxekate.pdfIn PDF document text
    • https://goactive.hu/wp-content/plugins/super-forms/uploads/php/files/a0f0ed1e2fe7369ce7629785de68f881/bemaveleridewumig.pdfIn PDF document text
    • http://itssilvertime.com/clients/2/24/24efe347a73a8ce028152bf895bc11a7/File/getazoropojotofetuwisek.pdfIn PDF document text
    • http://bendhorseride.com/userfiles/file/gitiziritililanogokune.pdfIn PDF document text
    • http://opalsolar.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1609583cac7215---97500413749.pdfIn PDF document text
    • https://ctsgroups.asia/images/file/54001822675.pdfIn PDF document text
    • http://xn--b1ahhafccpgkb2bxo.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/a391d97a20bff887e50069b777fb2cbc/pofux.pdfIn PDF document text

Related samples 8

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