Malicious PDF — malware analysis report

Static analysis result for SHA-256 447393caf4f0e61b…

MALICIOUS

PDF

46.8 KB Created: 2021-06-14 15:45:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 90c044a21dc3d4fc9837fae1f4e2e555 SHA-1: ba91dd4c165715b76c18d443507a733995c8903c SHA-256: 447393caf4f0e61b0dd2700e614cbc0ca85dfde80f9a81aa84ff5f2775c2344f
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document is classified as malicious by ML models and ClamAV, indicating a phishing or trojan threat. It contains numerous links, many pointing to compromised WordPress upload directories, suggesting it's part of a link farm designed to redirect users to malicious content. The document body, though heavily obfuscated, contains text related to MP3 downloads, likely a lure to disguise the malicious intent of hosting a payload on compromised infrastructure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8995

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://synerhu.ru/uplcv?utm_term=vande+mataram+srinivas+hit+songs+mp3+download PDF link annotation
    • http://99hospitalitygroup.com/ckfinder/userfiles/files/36853302542.pdfIn PDF document text
    • https://www.hontoys.com.au/wp-content/plugins/super-forms/uploads/php/files/kd1bmuk4jremhkogug3n5k50dt/88164430761.pdfIn PDF document text
    • http://www.next-conseil.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160a08ec53fe8c---lemamutelolerobeboweg.pdfIn PDF document text
    • http://www.xpresswedding.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ba621f3c9a6---folalupafekada.pdfIn PDF document text
    • https://islandsvefir.is/wp-content/plugins/super-forms/uploads/php/files/m6uanp7vfrvntlfv95v37umbva/8553928084.pdfIn PDF document text
    • https://shining4u.com/wp-content/plugins/super-forms/uploads/php/files/f67243cb0ff285fd61b3f69f67793919/vujan.pdfIn PDF document text
    • https://consultingexpert.eu/fckeditor/userfiles/file/megexuxubuwu.pdfIn PDF document text
    • http://uyaviation.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a59f3c22391---4088172201.pdfIn PDF document text
    • http://ngpsusa.com/wp-content/plugins/super-forms/uploads/php/files/mpsjub4g459ag0ci014257vdva/59125259733.pdfIn PDF document text
    • http://xperion.hu/wp-content/plugins/super-forms/uploads/php/files/6300ee108d294e2ddfaa586a54e41e7e/25237699865.pdfIn PDF document text
    • http://fecoil.com/userfiles/file/97262262455.pdfIn PDF document text
    • http://accessiblevehicleservices.com/userfiles/file/nusenowajejigulav.pdfIn PDF document text
    • https://anjingliar2.com/contents//files/81138808160.pdfIn PDF document text
    • https://aduanaldelvalle.com/userfiles/file/83777185991.pdfIn PDF document text
    • https://ccveg.org/wp-content/plugins/super-forms/uploads/php/files/95vluk651vtunbdotalfh927rs/wewelenadinorokex.pdfIn PDF document text
    • https://cullinanconstruction.com/wp-content/plugins/super-forms/uploads/php/files/or6rd7d33j6jfsrv2mq9gbk2s2/97156880431.pdfIn PDF document text
    • http://www.colegiometa.net/home/wp-content/plugins/formcraft/file-upload/server/content/files/1607bea6833977---23075277081.pdfIn PDF document text
    • https://burstallconrad.com/editor_files/file/1221247089.pdfIn PDF document text
    • https://thewentworthco.com/wp-content/plugins/super-forms/uploads/php/files/vt5ro60spkkk0chbf2f0pf0qt4/nuxobizogeletetepagot.pdfIn PDF document text

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