Malicious PDF — malware analysis report

Static analysis result for SHA-256 9dd11eb578615bc2…

MALICIOUS

PDF

55.6 KB Created: 2021-09-09 07:28:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-29
MD5: 956b021cba6dc6d7fc54b92cf140b75b SHA-1: 71568ec0ce203aaa134611b1a810aa15abd5300e SHA-256: 9dd11eb578615bc240ae38d702d906479d30b66a9008579b3f5e8dc92219db54
132 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external URIs, many of which point to disposable domains, indicating a link farm designed to obscure malicious destinations. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. The embedded JavaScript is likely used to facilitate redirection or exploit vulnerabilities.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7337

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://kargiskola.ge/myadmin/ckeditor/ckfinder/userfiles/files/tewonapuwenumekagiw.pdf In PDF document text
    • http://xecuoihuyhoang.com/uploads/userfiles/file/gotofunime.pdfIn PDF document text
    • https://celovechurch.org/wp-content/plugins/super-forms/uploads/php/files/23e3992d5b4f0357f1ea392fa9caf306/27830192173.pdfIn PDF document text
    • http://futimisdev.com/userfiles/file/75239184922.pdfIn PDF document text
    • http://e-restauracion.com/app/webroot/files/uploads/files/divewaforoxokavetinojew.pdfIn PDF document text
    • https://www.hediyevideo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613525709e1e7---97928985218.pdfIn PDF document text
    • https://jeevandeepspecialcare.com/ckeditor/ckfinder/userfiles/files/24155466718.pdfIn PDF document text
    • http://blackivy.pl/userfiles/file/24291915977.pdfIn PDF document text
    • http://langeline.com/ckeditor/upload/files/jojarupu.pdfIn PDF document text
    • http://binhchuachay.info/Images_upload/files/luzozuz.pdfIn PDF document text
    • http://goforthegreengolfpools.com/userfiles/file/99724598286.pdfIn PDF document text
    • http://circolosilverblufitnessclub.eu/userfiles/files/24693296572.pdfIn PDF document text
    • http://ducnhua.com/upload/files/9038526897.pdfIn PDF document text
    • https://coil.hk/upload/files/3850338590.pdfIn PDF document text
    • http://hoclaixebinhthuan.com/upload/contentFile/file/16054134059.pdfIn PDF document text
    • http://honda-vo.com/upload/file/nasid.pdfIn PDF document text
    • http://zs-g.jp/app/webroot/js/ckfinder/userfiles/files/kanifilime.pdfIn PDF document text
    • http://aguito.madteam.net/ckfinder/userfiles/files/19078696825.pdfIn PDF document text
    • http://immodraft.de/images/architekten_agentur_images_/file/86787098601.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/FevRqgeaUVY/uplcv?utm_term=best+torrent+search+app+androidPDF link annotation

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