Malicious PDF — malware analysis report

Static analysis result for SHA-256 e688956c531727fa…

MALICIOUS

PDF

63.0 KB Created: 2021-06-14 14:56:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: b37d6878ae378b0b7eb056063b4ec719 SHA-1: 314e558b872ffe64f06df83c4fc92df4cf86484a SHA-256: e688956c531727fa2ee9cca2ac1a5b3a8a9a477b384816aef05ec0f307bae686
154 Risk Score

Malware Insights

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

This PDF document was flagged by multiple heuristics as malicious, including a high-confidence ML classifier and ClamAV detection. It contains numerous embedded URLs, many pointing to compromised WordPress sites, suggesting a link farm designed to redirect users to malicious content. The presence of these links and the overall structure indicate an attempt to exploit users, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9662

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://inwebjor.ru/uplcv?utm_term=alien+1979+full+movie+123 PDF link annotation
    • https://www.northamericatalk.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bd867904ce1---timowefesezoramidumobulob.pdfIn PDF document text
    • http://arunimaflavours.com/userfiles/file/motulusabexitetavibug.pdfIn PDF document text
    • https://purebodycare.courses/wp-content/plugins/super-forms/uploads/php/files/7thu7iguvi79sae4r2jicnio14/vuzafap.pdfIn PDF document text
    • http://www.socalgreatwhite.com/wp-content/plugins/formcraft/file-upload/server/content/files/160806dcc84674---69528240643.pdfIn PDF document text
    • http://www.adatechotomasyon.net/wp-content/plugins/formcraft/file-upload/server/content/files/160b29ca82ca30---67893679406.pdfIn PDF document text
    • https://www.lightingsolutionsinc.net/wp-content/plugins/super-forms/uploads/php/files/3663deb972d6d3dba2ca6201e2933ce2/15811245573.pdfIn PDF document text
    • http://visualpaint.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c0006f384dd---26755786612.pdfIn PDF document text
    • http://rainbowcaterers.in/userfiles/file/66108543794.pdfIn PDF document text
    • https://investainternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/160833fd6277ac---kowotowam.pdfIn PDF document text
    • https://yourtuscanyguide.com/wp-content/plugins/super-forms/uploads/php/files/4oa28vphlp4vdmsivag4630jk3/bujovaburozoder.pdfIn PDF document text
    • http://snsi.jp/image/news_file/20645311984.pdfIn PDF document text
    • https://cananalimdar.com/wp-content/plugins/super-forms/uploads/php/files/khakgpmosc685rphe4qvemh2nf/25027901324.pdfIn PDF document text
    • http://ljhalls.com/wp-content/plugins/super-forms/uploads/php/files/d41b6d5be74eacd793e79fe119177c6b/14473683929.pdfIn PDF document text
    • http://n-production.com/upload/fckeditor/file/pifuxidovukesikamusate.pdfIn PDF document text
    • https://edoxmarketing.com/wp-content/plugins/super-forms/uploads/php/files/daa12htpmskl6h6if56d9k12oh/kerewebubig.pdfIn PDF document text
    • https://mebelpozakazu.ru/wp-content/plugins/super-forms/uploads/php/files/e29b9d0d830620a4ef04b8e744391456/nezowawumimitudu.pdfIn PDF document text

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