Malicious PDF — malware analysis report

Static analysis result for SHA-256 a1ee02ffdb8edff6…

MALICIOUS

PDF

149.9 KB Created: 2021-07-06 07:07:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 392485dc3676f7f568783966a67d1d1c SHA-1: b27869b653c8f10003dc7d811097f0faf59c3f66 SHA-256: a1ee02ffdb8edff6b3d79b5bad2aa1835e962bd3f1492d3046cf6de7056f0cba
154 Risk Score

Malware Insights

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

The sample is a PDF file identified as malicious by ClamAV and an ML classifier. It contains numerous links pointing to compromised WordPress sites and disposable hosting, suggesting a link farm designed to distribute further malicious content. The PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM heuristic specifically indicates that the links are hosted on compromised CMS upload storage, likely to disguise the malicious nature of the files being served.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6401

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 http://www.onekaddy.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b406fcc9a1---42928678879.pdf In PDF document text
    • https://repare-ton-smartphone.com/userfiles/file/xitarolikora.pdfIn PDF document text
    • http://georgekoldun.com/var/upload/file/mugutiwipekopipejakosate.pdfIn PDF document text
    • https://506hlapeta.com/files/file/xesevokanegarozuxe.pdfIn PDF document text
    • https://championsforchildren.org/wp-content/plugins/super-forms/uploads/php/files/ee450a7bd13dae8877342b3a7794377d/vupako.pdfIn PDF document text
    • http://andreagarciam.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608571d17cb73---dapujol.pdfIn PDF document text
    • https://www.actionconstructionjax.com/wp-content/plugins/super-forms/uploads/php/files/104034b15a6331d591e553463fc8e467/joxenefo.pdfIn PDF document text
    • https://www.marbelitesa.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16081017979758---zujujomixajolipenafugij.pdfIn PDF document text
    • https://www.goldenplanet.dk/wp-content/plugins/formcraft/file-upload/server/content/files/160cc22580b57c---wilokiwuraxup.pdfIn PDF document text
    • https://www.davidcosz.de/wp-content/plugins/super-forms/uploads/php/files/rdnq6nsr1rldclpdn0d4vl5e4l/52819064633.pdfIn PDF document text
    • https://szabobuszrendeles.hu/files/files/87375636532.pdfIn PDF document text
    • http://www.bestlifepolicy.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1606f246f5f4de---24792151717.pdfIn PDF document text
    • http://nuraski.pl/wsg/userfiles/49021931932.pdfIn PDF document text
    • https://www.eoluk.com/wp-content/plugins/super-forms/uploads/php/files/l7rll2mbl6st1un6f166gp65nr/35165347677.pdfIn PDF document text
    • http://extreamtuning.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1608ee8786d680---wejiwisekewibakenej.pdfIn PDF document text
    • http://opalbiosciences.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a5ecabcdd2a---mexutogumanovubuxeloti.pdfIn PDF document text
    • https://ntpuvoice.com/ckfinder/userfiles/files/viwowolepidibe.pdfIn PDF document text
    • http://asude.istanbul/ck_images/files/wodoruzikenawesagebi.pdfIn PDF document text
    • https://holzhaus-suedtirol.it/wp-content/plugins/formcraft/file-upload/server/content/files/16088ea2a37c24---pevuguj.pdfIn PDF document text
    • https://na-nule.ru/wp-content/plugins/super-forms/uploads/php/files/c491dsmk7g33p1j0um22gv1o92/89494698810.pdfIn PDF document text
    • http://ip-golubev.ru/ckfinder/userfiles/files/82118263570.pdfIn PDF document text
    • https://www.frankcapassoandsons.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608249aff3164---nedinoxe.pdfIn PDF document text
    • https://primeodontorj.com/wp-content/plugins/super-forms/uploads/php/files/b39cff76d7e59d5275112eb9a67e9afe/mifusorurobok.pdfIn PDF document text
    • https://alignerco.com/wp-content/plugins/super-forms/uploads/php/files/3419d0ab80f22b8e0d4f2cc4a9bbc5d7/zaxofakaxoxab.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/cv9VXjIrmdE/uplcv?utm_term=freud+meaning+of+lifePDF link annotation

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