Malicious PDF — malware analysis report

Static analysis result for SHA-256 eec8b8af0c3770c5…

MALICIOUS

PDF

77.6 KB Created: 2021-08-11 03:56:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 06967a351dadf3d725ee6861c27343ec SHA-1: 2289fa7aad2e4b97801e00cc48ebe84bdbfe6365 SHA-256: eec8b8af0c3770c51900c5d761109cee4de4146b7301f937329dd13fef1e16aa
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 numerous links, many pointing to compromised WordPress upload directories and disposable hosting, suggesting a link farm designed to redirect users. The presence of these links indicates an attempt to lead users to malicious sites, likely for phishing or to download further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5732

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://www.cifphosteleriayturismo.es/ckfinder/userfiles/files/41680772547.pdf In PDF document text
    • https://goactive.hu/wp-content/plugins/super-forms/uploads/php/files/d8737f6ae6827f16094b2643b02065f1/75670845336.pdfIn PDF document text
    • http://jeyadhurgatemple.com/userfiles/file/tuzazinuxagevog.pdfIn PDF document text
    • http://www.combatsim.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160c4c8883b62f---gufatinerabut.pdfIn PDF document text
    • http://podwierzba.eu/ckfinder/userfiles/files/kagiwid.pdfIn PDF document text
    • http://okna-dvere-online.cz/media/upload/upload/file/xulobufajat.pdfIn PDF document text
    • http://nbkhjc.com/uploads/202107/file/210722232017215772aowolh2bd4oj.pdfIn PDF document text
    • http://sensor4you.com/fckeditor/editor/filemanager/connectors/php/fckeditor/upload/202108/file/74014683387.pdfIn PDF document text
    • https://mytutr.com/wp-content/plugins/super-forms/uploads/php/files/881bbd7299ff6ae31be5f7e0abd4c322/33043560251.pdfIn PDF document text
    • http://favorit.pl/userfiles/file/xunuxudab.pdfIn PDF document text
    • http://peusch.lu/userfiles/files/wixelidinex.pdfIn PDF document text
    • https://boucherienabli.com/uploads/FCK_files/file/7263561753.pdfIn PDF document text
    • http://tycoonmedical.com/userfiles/file/18076196044.pdfIn PDF document text
    • https://holocaustresearch.pl/nowy/photo/file/nupisox.pdfIn PDF document text
    • http://lasfyy.com/uploadfile/file/20210702124734137.pdfIn PDF document text
    • http://www.playerclub.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16095b50667342---rudalemetevozafe.pdfIn PDF document text
    • https://parlagame.com/calisma2/files/uploads/37799248474.pdfIn PDF document text
    • http://faradtvandor.hu/picture/userfiles/file/15977312100.pdfIn PDF document text
    • http://phillipwhiting.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082c330d46ca---5397998548.pdfIn PDF document text
    • http://littlepearlspublishing.in/data/eimages/file/xapawidusubememodibalok.pdfIn PDF document text
    • http://ventilatoryzlin.cz/images/file/19348182126.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/GLLx1DTH0VQ/uplcv?utm_term=how+to+play+hide+and+go+seek+with+your+dogPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f19c.bin
1b3b16f6bda08c816a7c80ea4c846b0283ce6abd2138390475215b8ff396cff2		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF19C 11056 bytes
font_01_sfnt_off00010b22.bin
581e56a6b75b6fb47549cfd1b0428e5ea040d8e11ec3887977945aaf4fecf30b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10B22 16656 bytes

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