Malicious PDF — malware analysis report

Static analysis result for SHA-256 6cc8fe4edaabe6ec…

MALICIOUS

PDF

58.0 KB Created: 2021-07-20 15:48:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 6f691927f4227ce0ecd4d2601195c412 SHA-1: 450e91d838d7e9bfc839eabd8b15994ccc473f6d SHA-256: 6cc8fe4edaabe6ec1fb082e1e89b62093aad81966ac6ce8335b849a2a62d537f
162 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file contains embedded JavaScript and numerous external links, many of which point to compromised WordPress upload directories. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to redirect users to phishing or malware hosting sites. The presence of embedded JavaScript suggests potential for further exploitation beyond simple link redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7664

Heuristics 6

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://aihyang.com/userfiles/file/xupawedebezonitat.pdf In PDF document text
    • http://www.northeastmarquees.com/wp-content/plugins/super-forms/uploads/php/files/2bae45b51087660b5b7413f465125b7b/pugurobokajatane.pdfIn PDF document text
    • https://asaptransfers.co.uk/wp-content/plugins/super-forms/uploads/php/files/aeket6rm9e71f1c838e3i9b1h0/56505299166.pdfIn PDF document text
    • https://nikosdimos.gr/userfiles/file/girusitupoputafodoro.pdfIn PDF document text
    • http://www.park-seversk.ru/other/js/ckfinder/userfiles/files/vopakibibevowolabum.pdfIn PDF document text
    • https://www.masismarketing.com/wp-content/plugins/super-forms/uploads/php/files/7c35ab71f5c246de4f8ccc01bdfb2e84/30720181345.pdfIn PDF document text
    • https://www.cukoyem.com.tr/wp-content/plugins/super-forms/uploads/php/files/ol13am3arsf1026n1a76kri755/paluwebawunixuropiwuwarin.pdfIn PDF document text
    • http://italiangreyhound.pl/img1/userfiles/file/daxokupodeka.pdfIn PDF document text
    • http://ghioroiu.ro/sites/default/files/file/patuxapududufuzove.pdfIn PDF document text
    • http://tostonet.cl/ckfinder/userfiles/files/9883555917.pdfIn PDF document text
    • http://grandwatergatehotel.com/upfile_hotel/files/vutagelarebedubeta.pdfIn PDF document text
    • http://www.asejnrtigers.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1609156ea19d47---91853926259.pdfIn PDF document text
    • https://stefandes.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609a1a08a2413---90255022840.pdfIn PDF document text
    • http://scro.ru/pic/file/zalumonokolejero.pdfIn PDF document text
    • https://www.mybizwebsites.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c098103b5ff---508038167.pdfIn PDF document text
    • https://www.mercato.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160af991913110---87966383764.pdfIn PDF document text
    • http://www.greenbriarpropmgmt.com/wp-content/plugins/super-forms/uploads/php/files/187ab7d6d337f62c342c6bdb8039b466/77669291694.pdfIn PDF document text
    • http://amphorabeautyclub.com/campannas/file/86206277061.pdfIn PDF document text
    • http://djpress.pl/Image/files/45923284960.pdfIn PDF document text
    • http://tz5168.com/uploadfile/image/2021/05/26/file/20210526_184153_107.pdfIn PDF document text
    • http://clair-environnement.eu/catalogue_dynamique/file/70204510759.pdfIn PDF document text
    • https://bestmiamiturf.com/wp-content/plugins/super-forms/uploads/php/files/20957e34a68ba495be99c7a3df1839d8/61348086818.pdfIn PDF document text
    • http://albatrossmrn.com/konadnew/userfiles/file/nufosaluw.pdfIn PDF document text
    • https://lakecountyoralsurgery.com/wp-content/plugins/formcraft/file-upload/server/content/files/160919853e9f79---venajawowunujotatusifular.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/ngfLrbzwjls/uplcv?utm_term=fts+nt+scanPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d436.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD436 9712 bytes
SHA-256: 11f0755164af7c9c7ee4192c83ea6b4c5867ed000ee86d8e853e86337d07f4e4