Malicious PDF — malware analysis report

Static analysis result for SHA-256 74b7208821f3272a…

MALICIOUS

PDF

56.5 KB Created: 2021-05-08 14:02:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2514247811a6f3c326800100dac8b04d SHA-1: d3f5039dd8d373e1d072b4695ceee27fc1b0bac4 SHA-256: 74b7208821f3272a9146aa5ab32665e09f056d15c88c7b0b8adb7cf365136249
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links pointing to compromised WordPress sites and disposable hosting, suggesting a link farm designed to distribute malicious content or phish users. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware delivery. No scripts were extracted, but the PDF structure and embedded URIs are indicative of a malicious lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9915

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://archism.ru/uplcv?utm_term=restaurant+brochure+design+free
    • https://www.democratum.com/wp-content/plugins/super-forms/uploads/php/files/ce08dbf15b021ecabda0e97deb0d7d70/84986847139.pdf
    • http://www.christinemartin.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1607980ed2b4c6---setijesowi.pdf
    • https://pointsourcegroup.com/wp-content/plugins/super-forms/uploads/php/files/84782a45202d720a4b15b3d1cd045892/vutejiwumeb.pdf
    • http://www.kidnuri.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608b6af8474c9---11012670088.pdf
    • https://ethiquedevelopers.com/wp-content/plugins/super-forms/uploads/php/files/de68cbf25988ded7fa205623fa075455/belit.pdf
    • https://amrapalispot.com/userfiles/file/81797171984.pdf
    • https://cashofferoregon.com/wp-content/plugins/formcraft/file-upload/server/content/files/160772de1a3b92---89005545897.pdf
    • https://www.aceitedeoliva.com/wp-content/plugins/super-forms/uploads/php/files/0e5eb9dce87d07308824f6d38cca9c38/momipibafibesolowewunu.pdf
    • https://www.higher-energy-trampolineclub.com/wp-content/plugins/formcraft/file-upload/server/content/files/160714d967fffa---3636954158.pdf
    • https://www.lang-mayer.de/wp-content/plugins/formcraft/file-upload/server/content/files/16088648f49ba4---49770989353.pdf
    • http://ednak.com/wp-content/plugins/formcraft/file-upload/server/content/files/160786298e5291---kipesopuxavetosilo.pdf
    • https://webgirls-studio.com/wp-content/plugins/formcraft/file-upload/server/content/files/16081d6e7e6359---76663130870.pdf
    • https://www.projectorrentals.com/wp-content/plugins/formcraft/file-upload/server/content/files/160845a3a214c3---fepap.pdf
    • http://viaterrestre.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1608762b35c768---29649979292.pdf
    • http://vipavtoufa.ru/wp-content/plugins/super-forms/uploads/php/files/065b47bdbfbbbc1e43e2ff3f5794676a/kudiwifaju.pdf
    • https://postscriptproductions.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608d5cf63b4fe---64828437745.pdf
    • https://laihouston.com/wp-content/plugins/super-forms/uploads/php/files/a62a7ca3f2a923c70c6007d908bb414b/90859739397.pdf

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