Malicious PDF — malware analysis report

Static analysis result for SHA-256 ea0c9ef4b2885363…

MALICIOUS

PDF

62.5 KB Created: 2021-06-09 02:14:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-23
MD5: e3589bc7de54f92fc4fa7dc2d23c7a44 SHA-1: 636339bdaeefd84f7710ef17bedf4a3adce11072 SHA-256: ea0c9ef4b28853634f787dcdbb3aac2a67de3aca99b36e4ec506490bcabc27fe
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains numerous links to external websites, many hosted on compromised WordPress installations, suggesting a phishing or malware distribution campaign. The ClamAV detection and ML classifier strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a lure to download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6609

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://wastran.ru/uplcv?utm_term=online+report+card+comments+for+kindergarten PDF link annotation
    • https://southernlightingsource.com/wp-content/plugins/super-forms/uploads/php/files/e8eab1906bfecf432a274634df41f7ac/dewotamaxovumeki.pdfIn PDF document text
    • https://www.elementstraining.co.uk/wp-content/plugins/super-forms/uploads/php/files/30cb61vo4sslbvru8rp9449ag1/xupatinokekudo.pdfIn PDF document text
    • https://cremeconferences.com/wp-content/plugins/super-forms/uploads/php/files/4705129bec71bee72ddebdc440ff6326/rutuzumebenanekata.pdfIn PDF document text
    • http://www.opencalgary.org/wp-content/plugins/formcraft/file-upload/server/content/files/160affb7327238---mojifiminorofopiniremuri.pdfIn PDF document text
    • https://contabil-fiscal.ro/mm/file/topomupidivokedune.pdfIn PDF document text
    • http://fashioncenterpoint.com/wp-content/plugins/super-forms/uploads/php/files/26c71b02daa4896a9767ec0f56fc1230/47597404136.pdfIn PDF document text
    • http://josephlillianmorrisfamily.com/clients/59960/File/70386419836.pdfIn PDF document text
    • https://zivotzaokny.eu/res/file/xuzuzaloxuxure.pdfIn PDF document text
    • http://dfh-consulting.com/userfiles/file/mozurebamideboveguxuz.pdfIn PDF document text
    • https://sitebyside.ru/wp-content/plugins/super-forms/uploads/php/files/753f1dda2757265c9217217ddc02fe41/17411059570.pdfIn PDF document text
    • https://traveltokiev.com/wp-content/plugins/super-forms/uploads/php/files/9dmdll8a46aqd2clsoar09vfc5/57634663039.pdfIn PDF document text
    • http://occahomesearch.com/userfiles/files/78640736512.pdfIn PDF document text
    • http://maidnheaven.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d5fc0e3e49---13335322142.pdfIn PDF document text
    • http://s292376414.onlinehome.fr/datas/imgmail/file/dupunone.pdfIn PDF document text

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