Malicious PDF — malware analysis report

Static analysis result for SHA-256 e9b6c6bf9ae6fa96…

MALICIOUS

PDF

53.0 KB Created: 2021-09-11 03:22:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 9aee8d667f6ade54627bb35a2a8ac82f SHA-1: 96c5e3b446f237bc4383b2726d88533026aaf428 SHA-256: e9b6c6bf9ae6fa960ae46e87ed04f63af6ef9d4941864f2eda1368d39a855a9f
132 Risk Score

Malware Insights

MITRE ATT&CK
T1059.007 JavaScript T1566.001 Spearphishing Attachment

The sample was detected as malicious by ClamAV and an ML classifier, and it contains embedded JavaScript. The PDF also functions as a link farm, directing users to numerous external URLs, one of which is hosted on disposable infrastructure. This suggests the PDF is designed to lure users to potentially malicious sites, likely as part of a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6152

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
  • 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://s4l.vn/storage/ckfinder/files/55912647892.pdf In PDF document text
    • https://hacunamatata.ru/wp-content/plugins/super-forms/uploads/php/files/c55c665e777b45fbb073479917f7a30f/takopafitakekikegenadov.pdfIn PDF document text
    • http://carsonpokebar.com/uploads/files/66916570986.pdfIn PDF document text
    • http://traiteur-ribot.fr/userfiles/file/bexevesoralorizesege.pdfIn PDF document text
    • http://rentappli.com/tinymce/jscripts/tiny_mce/plugins/phpimage/phpimage/upload/images/file/87008522439.pdfIn PDF document text
    • http://simonide.org/userfiles/file/ruxurawixisevusovulas.pdfIn PDF document text
    • http://szyqjsj.com/UploadFile/file/20210909221254209.pdfIn PDF document text
    • https://profesa.net/userFilesfile/simofev.pdfIn PDF document text
    • http://lovec.bg/root/ckfinder/userfiles/files/21445257242.pdfIn PDF document text
    • http://pansophers.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613bee2fd59fc---48990236093.pdfIn PDF document text
    • http://xn--b1akwe.xn--p1ai/userfiles/file/20896612173.pdfIn PDF document text
    • http://allseasonsart.com/uploads/fck_uploads/file/49536867688.pdfIn PDF document text
    • http://dobrejaja.com/Upload/file/lepevifufagowuxaka.pdfIn PDF document text
    • http://perechen-izdaniy.ru/js/ckfinder/userfiles/files/83409606094.pdfIn PDF document text
    • https://birudongker.com/contents/files/37357818355.pdfIn PDF document text
    • http://centrlita.ru/archive/image/file/xizuredibejowodav.pdfIn PDF document text
    • http://vecsecity.info/editor_up/40582434238.pdfIn PDF document text
    • http://lexprikson.com/admin/style/images/userfiles/file/70244445503.pdfIn PDF document text
    • https://comfortinnbarrie.com/phpsites/vertical_living/uploads/file/94353686016.pdfIn PDF document text
    • https://alexandrapanayotou.com/web/images/static/file/13716126538.pdfIn PDF document text
    • http://gloria-eurex.com/images/blog/file/depalusopuregarumi.pdfIn PDF document text
    • http://gaytonfa.com/upload/files/tileveninabiwazosofetunep.pdfIn PDF document text
    • http://hotelrefah4ter.ir/basefile/hotelrefah4terir/files/87268114838.pdfIn PDF document text
    • http://humansharehouse.com/userData/board/file/nogifidusa.pdfIn PDF document text
    • https://tw-itemaos.com/ckfinder/userfiles/files/13236427276.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/FevRqgeaUVY/uplcv?utm_term=how+to+delete+downloads+on+androidPDF link annotation

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