Malicious PDF — malware analysis report

Static analysis result for SHA-256 4a09406baba0d607…

MALICIOUS

PDF

45.0 KB Created: 2021-09-27 07:15:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: b3ddf4cd62a83066b3cf69f591dc4b5a SHA-1: f01e9d4cb1e3cb67ef4c3e666d46ac308c7d4d0b SHA-256: 4a09406baba0d607aae9a2aaf028a2a4fe23413ae694f35a09e9d5bd11f4a551
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a phishing or trojan threat. It contains a link farm pointing to various domains, some of which are hosted on compromised CMS uploads, suggesting an attempt to redirect users to malicious content. The presence of embedded URLs and the nature of the heuristics point towards a phishing or credential harvesting attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7664

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
  • 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://www.atsamuihaus.com/image/upload/File/sebar.pdf In PDF document text
    • http://franklcalabreseattorney.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/14659676677.pdfIn PDF document text
    • http://vititanon.com/user_img/files/88975956718.pdfIn PDF document text
    • http://scenekunstskolen-efteruddannelsen.dk/ckfinder/userfiles/files/xagux.pdfIn PDF document text
    • https://812423.qqtogeljackpot2.com/contents/files/75312768693.pdfIn PDF document text
    • https://wentworthre.com/wp-content/plugins/super-forms/uploads/php/files/94a14a8aa2ab133b9380ce585841a973/96757420781.pdfIn PDF document text
    • http://reiki-roots.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16143bcd029096---32481972523.pdfIn PDF document text
    • http://xn--djr00fsyfv0o5qgy9u.net/filespath/files/20210913225008.pdfIn PDF document text
    • http://imhang.com/fckeditor/userfiles/image/kepob.pdfIn PDF document text
    • http://proximeo.com/ckfinder/userfiles/files/jolosarabulewiw.pdfIn PDF document text
    • http://longarmquiltacademy.com/fckeditor/userfiles/file/12620179169.pdfIn PDF document text
    • https://12tiga.com/contents/files/75941820983.pdfIn PDF document text
    • http://vntattoosupply.net/uploads/image/files/18833848193.pdfIn PDF document text
    • http://xn--h1agcmh.com/ckfinder/userfiles/files/munawo.pdfIn PDF document text
    • http://dreamcatcherltd.com/userfiles/file/texopuneletaxu.pdfIn PDF document text
    • http://aeronautike.com/userfiles/file/kepakenu.pdfIn PDF document text
    • http://abpjseah.news-read.com/upload/files/litikapaz.pdfIn PDF document text
    • http://a899.net/userfiles/file/56473540194.pdfIn PDF document text
    • https://www.horisunmauritius.com/wp-content/plugins/super-forms/uploads/php/files/051e3f529b64c213a4c159f024e06dd7/pozatepipefojafop.pdfIn PDF document text
    • http://phulieumaymacbaoco.com/hinhanh_fckeditor/file/nujonizogige.pdfIn PDF document text
    • https://plumcourse.com/wp-content/plugins/super-forms/uploads/php/files/129561d52600bf704fe5ddde3c35302e/vofarafinul.pdfIn PDF document text
    • http://studiostocchi.eu/userfiles/files/ragewi.pdfIn PDF document text
    • http://lncxjzxxw.com/upload_fck/file/2021-9-27/20210927060627936286.pdfIn PDF document text
    • http://theprofitnesstrainers.com/userfiles/file/92065102651.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1xuhb7AK25c/uplcv?utm_term=restore+titanium+backup+without+rootPDF link annotation

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