Malicious PDF — malware analysis report

Static analysis result for SHA-256 9c5cb52cc32865bd…

MALICIOUS

PDF

63.7 KB Created: 2021-06-15 09:58:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-16
MD5: 75d2ec49d970dbb1123509e502909f22 SHA-1: 97a28f83f2c249920b87649bca116d2331a2f6f3 SHA-256: 9c5cb52cc32865bdb2d70549cd7481caec7be71f8b090965e54a79aa9348e170
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. It contains numerous external URIs and is identified as a link farm hosted on compromised WordPress sites and disposable domains. The document body, though heavily obfuscated, suggests a lure related to 'Discord font commands', likely intended to direct users to malicious sites for phishing or malware download.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8982

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://inwebjor.ru/uplcv?utm_term=discord+font+commands PDF link annotation
    • https://emilline.dk/ckfinder/userfiles/files/99205786392.pdfIn PDF document text
    • https://coachtourbusrental.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a152b98fd76---radoxexo.pdfIn PDF document text
    • http://fonnepal.org/userfiles/file/dadegiwumos.pdfIn PDF document text
    • http://europeanprofservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/16076dbb32a433---58977787702.pdfIn PDF document text
    • https://xn----8sbaavnccwq4am.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/2d92ef771937ebb7b339dc1ae47b7bc1/zafidubilovadelazap.pdfIn PDF document text
    • https://pk-kuepfer.ch/ckfinder/userfiles/files/zetuzelaxajikofuvato.pdfIn PDF document text
    • https://retentionstudentexperience.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608f79df04562---mezejolepab.pdfIn PDF document text
    • https://bwawarszawa.pl/upload/file/47002560263.pdfIn PDF document text
    • https://www.chartsunlimited.com.ph/wp-content/plugins/formcraft/file-upload/server/content/files/160776df7913f6---galapubor.pdfIn PDF document text
    • https://www.birdandwildlifeteam.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606ebb7325216---jatofataboxuv.pdfIn PDF document text
    • https://www.kngroup.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a46df09d8d6---zaparonevufewabakizul.pdfIn PDF document text
    • http://manufim.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/1607c62485eb03---marukeratab.pdfIn PDF document text
    • https://brandonsmilesdentistry.com/wp-content/plugins/super-forms/uploads/php/files/11b5b1g5lb780ppallrgjimt21/51545768093.pdfIn PDF document text
    • http://augustaelectricalwork.com/editorData/file/xenaveradasixupid.pdfIn PDF document text
    • http://www.studiolegalefusimorelli.com/wp-content/plugins/formcraft/file-upload/server/content/files/160814321a44e8---xunejewe.pdfIn PDF document text
    • https://www.frankreich-ferien.ch/wp-content/plugins/formcraft/file-upload/server/content/files/16095df8a75da7---lidetarugapaxudok.pdfIn PDF document text
    • https://apparel.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/791246057bf2b8781ace4ccdeff5dfac/32674194588.pdfIn PDF document text

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