Malicious PDF — malware analysis report

Static analysis result for SHA-256 bd945516ce2a990e…

MALICIOUS

PDF

63.7 KB Created: 2021-05-30 22:08:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-14
MD5: cca13a75d09799813f7b953b511cc72e SHA-1: a7ee8548f79e32ca737642540f062eceb0511f20 SHA-256: bd945516ce2a990e4a48fade86e51a06cd78dd87293ee53a81dd360a5ec31f9c
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF file contains numerous links, many pointing to compromised or disposable hosting, suggesting a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly indicate malicious intent. The document's content, disguised as a guide for conference presentations, is a lure to direct users to these untrusted sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9783

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 https://www.myosiaffiliate.com/199trust/img/file/faxukogukosekesibagi.pdf In PDF document text
    • https://www.criteriainvest.com.br/wp-content/plugins/super-forms/uploads/php/files/8iukcosaa7hk5u700napg7jlj8/79371204585.pdfIn PDF document text
    • https://autosofortkauf.ch/wp-content/plugins/super-forms/uploads/php/files/sk31dsh9sqq3gaj504ng908jei/lajulazudofuku.pdfIn PDF document text
    • http://www.zulfugar.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160728576cb6d5---6387587254.pdfIn PDF document text
    • http://consulcongress.it/uploads/assets/file/xipov.pdfIn PDF document text
    • http://www.majorisinvestimentos.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16090ab6f92253---wajit.pdfIn PDF document text
    • https://www.rowtheerne.com/wp-content/plugins/super-forms/uploads/php/files/a626b18cc5ef1123f7fdf859e425e39d/dixaputiga.pdfIn PDF document text
    • http://countrysquirefoods.com/wp-content/plugins/formcraft/file-upload/server/content/files/16099bdb5eeed7---wumulurudidoj.pdfIn PDF document text
    • https://bomberosdenavarra.com/userfiles_nexo/files/28335993592.pdfIn PDF document text
    • http://s8radziejowice-paszkow.pl/userfiles/file/86692618152.pdfIn PDF document text
    • https://naseeha.org/wp-content/plugins/super-forms/uploads/php/files/4a7dd8634241f251067d36ed274cd588/vapijizurerulexamalu.pdfIn PDF document text
    • http://www.rec39.ru/wp-content/plugins/super-forms/uploads/php/files/c3460ff210d60ac505e9a37565318e77/futip.pdfIn PDF document text
    • https://eminencesolutions.in/resources/userfiles/file/57654632959.pdfIn PDF document text
    • https://macleanpinesdrivingschool.com.au/wp-content/plugins/super-forms/uploads/php/files/a1bf673949de99808eb3d6c403f6d911/26462990618.pdfIn PDF document text
    • https://www.grecosalesinternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c933835030---jixotemiz.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BkSY9tpko7c/uplcv?utm_term=how+to+write+a+poster+presentation+for+conferencePDF link annotation
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e0b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0B0 4816 bytes
SHA-256: 29e5dc01fb3105c3924f40c5dcd1805d86ae2fa446e82a9b3b4687d08ea0a72e

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