Malicious PDF — malware analysis report

Static analysis result for SHA-256 f095614995285aee…

MALICIOUS

PDF

47.6 KB Created: 2021-06-07 00:57:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: c9b31595bdd8d3ae23ae4a32054f129a SHA-1: cbef3937a48590b557904ce06d7a36e572e77b0c SHA-256: f095614995285aee67d999d8a783f4f2599ae2c27bc714fb0cccd43d281d70e6
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 embedded URLs, many pointing to compromised CMS upload directories or disposable hosting, suggesting a link farm designed to redirect users to malicious content. The document body, though heavily obfuscated, contains metadata related to PDF generation and a URL that appears to be a lure for information related to 'trapezius spasm'. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7205

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=how+to+relieve+trapezius+spasm PDF link annotation
    • https://proxus.nl/file/88728366618.pdfIn PDF document text
    • https://energooptima.hu/upload/File/59252032583.pdfIn PDF document text
    • http://raduzhniy.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ada00e9f15c---jimidejumubaredus.pdfIn PDF document text
    • https://rffsev.ru/wp-content/plugins/super-forms/uploads/php/files/040b4419e3f6c7288fdda252e1f0101a/66738957758.pdfIn PDF document text
    • https://www.oasipizza.it/wp-content/plugins/formcraft/file-upload/server/content/files/160b9d984aefc8---78225483622.pdfIn PDF document text
    • http://boxerdapolenta.com/cmsimple/images/file/loxosadoluxapamukutewoxaf.pdfIn PDF document text
    • https://www.teppiche-waschen-hamburg.de/wp-content/plugins/formcraft/file-upload/server/content/files/160af9a7aee743---97515164200.pdfIn PDF document text
    • https://aryaayur.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f0ae65dff9---fomewi.pdfIn PDF document text
    • http://matstravel.ru/userfiles/file/99792882802.pdfIn PDF document text
    • https://smarttactic.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1607fb9cfac57f---46750831888.pdfIn PDF document text
    • https://zionapostolicministries.org/uploads/file/42494148603.pdfIn PDF document text
    • https://www.novet.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a187855b0b4---gezazurevewog.pdfIn PDF document text
    • https://nceptionsolutions.com/wp-content/plugins/super-forms/uploads/php/files/19d9ae4ed94c59c646a0910d6bac233c/62032928803.pdfIn PDF document text
    • http://alvasari.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609cfb4f639a8---94485545563.pdfIn PDF document text
    • https://www.democratum.com/wp-content/plugins/super-forms/uploads/php/files/3e7f575c6a224b8721f03d5944b8247d/61238136534.pdfIn PDF document text
    • https://lostsoulsmemorialnj.org/wp-content/plugins/super-forms/uploads/php/files/453c917907c836aa273df06cc05a56de/jipojovevufopamixe.pdfIn PDF document text
    • http://aldo-ins.com/userfiles/file/woporajujaroborom.pdfIn PDF document text

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