Malicious PDF — malware analysis report

Static analysis result for SHA-256 55ba5b6920ee06b3…

MALICIOUS

PDF

53.8 KB Created: 2021-06-01 19:07:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 29e899b33c892152858cadf74e08ee78 SHA-1: 09c810c0f92b06e00d60b0ca137217d27984145e SHA-256: 55ba5b6920ee06b3cf4b54b1d5a1f8ec1fb4721197607a22f3e9fe4ccea61136
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous links, many of which point to compromised WordPress upload directories, indicating a link farm designed to distribute malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution via these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9812

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.northamericatalk.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084b60ba5fe5---41953347503.pdf
    • http://abwingssuffolk1.com/uploads/files/19977744367.pdf
    • http://stkvn.ru/wp-content/plugins/super-forms/uploads/php/files/da39b450cf4fd3737106101f64df91e3/puxevirud.pdf
    • http://kimbuunguyen.com/uploads/userfiles/file/49750096185.pdf
    • https://rhagro.com.mx/wp-content/plugins/super-forms/uploads/php/files/4b8b69a34140a83605888fb035730481/dokuti.pdf
    • http://ajtoablakcentrum.com/_user/file/23514285164.pdf
    • https://cffcommunications.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1/1607b21cf79f26---29102548384.pdf
    • https://nceptionsolutions.com/wp-content/plugins/super-forms/uploads/php/files/01010e7c7bc6f877578e71f92a0bbf3b/likamidejivofepoma.pdf
    • https://cruiseship.cruises/wp-content/plugins/super-forms/uploads/php/files/kfsmttkuf5fu861ut3op3dlvpn/velobaresefijozigo.pdf
    • https://skyfireconsulting.com/wp-content/plugins/super-forms/uploads/php/files/07tmqv6g8vtkb9h5l2s27ms784/dusamisoki.pdf
    • https://humantouchtranslations.com/wp-content/plugins/formcraft/file-upload/server/content/files/1/1607534d930c27---1447021391.pdf
    • https://hopefor.today/wp-content/plugins/super-forms/uploads/php/files/b5ba90377c148aa2698f1557fcc09d89/bogejurum.pdf
    • http://extreamtuning.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160942e8c68d7a---zisofadijowax.pdf
    • https://relaxationplusmn.com/wp-content/plugins/super-forms/uploads/php/files/e6d4098b823fa192411dd766fc77dee8/vuxid.pdf
    • http://fogathajtohirek.hu/fckfiles/file/gatokexoteroz.pdf
    • http://anhbanglaw.com/userfiles/file/70781898406.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/YTWXjIUwRh0/uplcv?utm_term=dbz+shin+budokai+another+road+psp+save+game+trucchi

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