Malicious PDF — malware analysis report

Static analysis result for SHA-256 e2b77742d5fcd8ec…

MALICIOUS

PDF

48.0 KB Created: 2021-09-20 08:47:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23
MD5: 8e2077e00509d81aaba9badbf50e47ba SHA-1: 58107c101fc613a137b6f9c24a4f5b1b3ed5c260 SHA-256: e2b77742d5fcd8ec2662df1c2399e091c026e1a3135c282f2b58562b0cae0353
94 Risk Score

Malware Insights

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

The PDF file contains a link farm with numerous URLs, many pointing to compromised CMS upload storage. The ML classifier also flagged this PDF as malicious. The presence of multiple external links and the nature of the hosting suggest an attempt to redirect users to potentially harmful content or for SEO manipulation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5207

Heuristics 4

  • 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://bodegaadrover.com/userfiles/imagenes/6465179978.pdf In PDF document text
    • http://hysansam.com/fckeditor/userfiles/image/sufuxurinebukewebuto.pdfIn PDF document text
    • https://klubkanine.com/home/klub/public_html/ckfinder/userfiles/files/41128682193.pdfIn PDF document text
    • http://gabinetortodontyczny.eu/userfiles/file/60315333379.pdfIn PDF document text
    • http://milwaukee.center/userfiles/file/jovigimoluguvukujekog.pdfIn PDF document text
    • http://quiltingacademy.net/fckeditor/userfiles/file/moduwipunuvobofavoruweg.pdfIn PDF document text
    • https://hyosung-gulf.com/uploads/file/5335203204.pdfIn PDF document text
    • http://kaiyudachem.com/filespath/files/20210919134144.pdfIn PDF document text
    • http://jmdfhjl.com/fckeditor/userimages/file/38483967896.pdfIn PDF document text
    • https://sk-developers.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613c1c4b8d6cb---tokebevepukuburafof.pdfIn PDF document text
    • http://vattuxaydunghl.com/userfiles/file/ramuzazovoweweganates.pdfIn PDF document text
    • http://danies.ru/ckfinder/userfiles/files/zanuv.pdfIn PDF document text
    • http://mountmedpharmacy.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1612fb5f1478ec---48363118494.pdfIn PDF document text
    • https://guineaservicesproviders.com/gsp/files/15055589588.pdfIn PDF document text
    • https://kitapkaplama.com/upload/ckfinder/files/95656249360.pdfIn PDF document text
    • http://budaors.varosom.hu/userfiles/files/jekufatapovenaz.pdfIn PDF document text
    • http://phuketdriveschool.com/userfiles/file/95496461054.pdfIn PDF document text
    • http://mylodge-naoshima.com/images/blog/file/68277514433.pdfIn PDF document text
    • https://avukatwebsitesi.trakyasoft.com/upload/files/zuzepof.pdfIn PDF document text
    • https://www.chablis-gautherin.com/ckfinder/userfiles/files/31130564079.pdfIn PDF document text
    • http://refpecsbelvaros.hu/kepek/files/16198076663.pdfIn PDF document text
    • https://thepetrichortouch.com/wp-content/plugins/super-forms/uploads/php/files/82r79en76rnb1b5ag0ece5r0qq/66385669298.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/zMnd8XtcwSM/uplcv?utm_term=download+minecraft+apk+homePDF link annotation