Malicious PDF — malware analysis report

Static analysis result for SHA-256 2d584b50b3996f28…

MALICIOUS

PDF

51.6 KB Created: 2021-06-12 01:01:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 7d4594802f30c0c92abc4d427b80e425 SHA-1: 1d5f1d3190a9352784f636e66f87ff3198e57dc6 SHA-256: 2d584b50b3996f28e0da15b8d3ce510a02a257cbfeba995fdda5345b585ff390
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file is classified as malicious by ClamAV and an ML classifier, indicating a phishing or trojan threat. It contains numerous links to external websites, many of which are hosted on compromised WordPress installations or disposable domains, suggesting a link farm designed to redirect users to malicious content. The document body, though heavily obfuscated, contains text related to downloading music, likely a lure to disguise the malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7360

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.
  • 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 https://oniceh.ru/uplcv?utm_term=download+lagu+flac+gratis PDF link annotation
    • https://adbetelparaguay.com/wp-content/plugins/super-forms/uploads/php/files/f31595c87d4d39312b300ce94272af97/88603326352.pdfIn PDF document text
    • https://www.cdscabling.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160b49404643c9---17303409071.pdfIn PDF document text
    • http://animalscipublisher.com/files/upfiles/file/duxedivokuvemokigaro.pdfIn PDF document text
    • http://adamlegal.com/userfiles/file/werufenobavuxus.pdfIn PDF document text
    • http://asupuro.com/upload/save_image/files/5275410527.pdfIn PDF document text
    • https://ventana-sur.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cf3518358c.pdfIn PDF document text
    • https://africanresearchcenter.com/userfiles/file/78792893991.pdfIn PDF document text
    • http://a-kamen.com/userfiles/file/48454920262.pdfIn PDF document text
    • http://garmagostaran.com/Upload/file/zulapazanatopejibulosif.pdfIn PDF document text
    • https://ladychief.com/wp-content/plugins/super-forms/uploads/php/files/bac38c21364ffe686411b5fdba7f43ea/47114041012.pdfIn PDF document text
    • http://yuanjen.com/ckfinder/userfiles/files/61841118723.pdfIn PDF document text
    • http://queuemanagementsystems.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a4bc39966c9---96055584639.pdfIn PDF document text
    • http://boxethai38.comupload/file/midakulugeguwir.pdfIn PDF document text
    • https://space1500.com/wp-content/plugins/super-forms/uploads/php/files/53eb29b765bea77f53c105446a67d7bb/zebuvijixutasakexuvi.pdfIn PDF document text
    • https://unitedcardsolutions.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607047ee4aba4---15430287820.pdfIn PDF document text
    • http://vtracauto.com/wp-content/plugins/formcraft/file-upload/server/content/files/16077b92bcadd7---domobizoborox.pdfIn PDF document text

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