Malicious PDF — malware analysis report

Static analysis result for SHA-256 ea6697b5edc8a013…

MALICIOUS

PDF

73.3 KB Created: 2021-06-25 00:06:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02
MD5: 0f1707a58051207210a24f976d816568 SHA-1: 70611eaee3fd9fc45bbb87dc070db8d9fe062dd8 SHA-256: ea6697b5edc8a013392c42e65742fd03d50da3045bf4d7e731002da849ebde4c
154 Risk Score

Malware Insights

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

The PDF contains numerous links to external websites, many of which are hosted on compromised WordPress installations, suggesting a link farm or phishing lure. The ClamAV detection and ML classifier strongly indicate malicious intent, likely to redirect users to sites hosting malware or phishing content. The document body is heavily obfuscated and unreadable, providing no direct clues to its specific purpose beyond the embedded links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7674

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://pistant.ru/uplcv?utm_term=pdf+of+e+commerce PDF link annotation
    • https://readxyz.org/wp-content/plugins/super-forms/uploads/php/files/72887807f1d2d3657e0a0dc24c59e4a4/87950188282.pdfIn PDF document text
    • http://gostium.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b20dda49f9a---66799369714.pdfIn PDF document text
    • http://objetivovender.com/wp-content/plugins/formcraft/file-upload/server/content/files/16079dfa7f122a---66075418692.pdfIn PDF document text
    • http://hydrem.ru/images/file/81835237579.pdfIn PDF document text
    • http://postelezmasivu-brno.com/ckfinder/userfiles/files/xakewikobadivinibulolo.pdfIn PDF document text
    • http://thermogroup.ru/uploads/files/84294674688.pdfIn PDF document text
    • http://www.dnevi-sekretarjev.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160aa1289cde18---kifatekan.pdfIn PDF document text
    • https://rjiminfra.com/wp-content/plugins/super-forms/uploads/php/files/c1f9115bc620704fe1fb95b687dc538a/mukesabevilinakifererawad.pdfIn PDF document text
    • https://spencershaulageltd.co.uk/wp-content/plugins/super-forms/uploads/php/files/0d1d9a222b4dc7a61d98601fe1eb5d93/gajiduluninebunoku.pdfIn PDF document text
    • https://www.duffylighting.com/wp-content/plugins/super-forms/uploads/php/files/c436cb4df6c7fe50b5c71829212bade7/24952782267.pdfIn PDF document text
    • http://ahdongjiu.com/upload_fck/file/2021-5-2/20210502055520806174.pdfIn PDF document text
    • https://charterfori.ir/basefile/charterforiir/files/34055632030.pdfIn PDF document text
    • https://www.coconutlodge.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608da7baa6c3e---42457847261.pdfIn PDF document text
    • https://www.kadinlarsitesi.org/wp-content/plugins/formcraft/file-upload/server/content/files/160990ceb34836---jejupumogisivavako.pdfIn PDF document text
    • https://buddingheights.org/wp-content/plugins/formcraft/file-upload/server/content/files/160815f523ce2d---28743826496.pdfIn PDF document text
    • http://absolutelyneon.com/userfiles/file/xuvajozarevupo.pdfIn PDF document text
    • https://fietenhaardenenkachels.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160737584a38d5---molebisopaf.pdfIn PDF document text

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