Malicious PDF — malware analysis report

Static analysis result for SHA-256 979c3eb34536aa70…

MALICIOUS

PDF

213.3 KB Created: 2021-06-22 21:04:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 8f9feec203ca64e60765949c909ba82c SHA-1: 263eeb924dc609598391f3a283440063a69d1fe3 SHA-256: 979c3eb34536aa707f03b9621ab402fe48e087fb1245ae4681e348793d05e8f3
132 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and a link farm pointing to compromised WordPress upload directories, indicating an attempt to distribute further malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. The embedded JavaScript is likely responsible for initiating the download or redirection to these malicious files.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9600

Heuristics 5

  • 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.
  • 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 https://schreinerheusi.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a5367b009d6---31831160411.pdf In PDF document text
    • http://www.radiopopiatej.com/wp-content/plugins/formcraft/file-upload/server/content/files/160771448d7f5a---12319645906.pdfIn PDF document text
    • https://wccia-vastu.com/wp-content/plugins/super-forms/uploads/php/files/eb93aff95a83b06ca26b5a2f66c2d70e/32075516605.pdfIn PDF document text
    • http://4bx.pl/public/file/26279955480.pdfIn PDF document text
    • http://berallebags.com/UploadFiles/FCKeditor/20210608180545.pdfIn PDF document text
    • http://dabien.co.kr/wp-content/plugins/formcraft/file-upload/server/content/files/16075ac8a36f12---xizof.pdfIn PDF document text
    • http://automotiveenergy.cz/userfiles/file/fatijisoz.pdfIn PDF document text
    • https://arenda1s.ru/wp-content/plugins/super-forms/uploads/php/files/cc7509b6d517a398b0991490f63077c8/wudenojorenosupol.pdfIn PDF document text
    • http://ipllaser.in/uploads/bunafonu.pdfIn PDF document text
    • http://aliancegroup.su/wp-content/plugins/formcraft/file-upload/server/content/files/160b7e9d282e7d---pejewinegope.pdfIn PDF document text
    • https://dafelia.com/files/favekezolupuweruwulevoka.pdfIn PDF document text
    • https://cplastik.com/data/cms/file/duwigaximebupesuvoxugonin.pdfIn PDF document text
    • https://smarttactic.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160876b2c920ef---vipiniduwogenusi.pdfIn PDF document text
    • http://gayaarchi.com/userfiles/file/20210614050628.pdfIn PDF document text
    • https://vallejardin.com/wp-content/plugins/super-forms/uploads/php/files/5d445cccfe885cb58e513a262147b7df/43257193055.pdfIn PDF document text
    • http://arserwood.com/js/fckeditor/editor/filemanager/connectors/php/connector.php/upfiles/file/210515093918528305gwxbv4.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3vuEKuznOb8/uplcv?utm_term=salt+industries+discord+serverPDF link annotation

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