Malicious PDF — malware analysis report

Static analysis result for SHA-256 bc28cb553f210207…

MALICIOUS

PDF

62.4 KB Created: 2021-06-09 14:11:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: e6fba818b4cd87c214d380887e61343f SHA-1: 14afa0ce74ba838d6e1d40e6022e4aa3adda1567 SHA-256: bc28cb553f210207ecba44c5dd2bdff03ec3a639b14e6bd87da1d9f314732fd4
94 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link farm pointing to compromised WordPress sites, a common tactic for distributing malicious files or phishing lures. The ML classifier also flagged this PDF as malicious. The presence of external URIs and the structure of the PDF suggest it is designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7026

Heuristics 4

  • 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://smidgel.ru/uplcv?utm_term=windows+10+iso+file+download+64+bit+free+download+full+version PDF link annotation
    • http://dossalas.com/wp-content/plugins/super-forms/uploads/php/files/b726fb588dbf25951d67dcc56cbd12c8/19485694198.pdfIn PDF document text
    • https://hpx.com.ua/wp-content/plugins/super-forms/uploads/php/files/bcff9a74289cb156100d52f3e6a15d13/17085688649.pdfIn PDF document text
    • http://webscape.co.bw/wp-content/plugins/formcraft/file-upload/server/content/files/16078b6c2a9ebc---goduxuriseriralebi.pdfIn PDF document text
    • https://asigurareingermania.ro/wp-content/plugins/super-forms/uploads/php/files/nqs1ijgcmehphct4pa8rki4dsm/danofozuvajajux.pdfIn PDF document text
    • https://dipinkrishna.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609a3b16b7bcc---78364930952.pdfIn PDF document text
    • http://maxidmum.com/images/upload/fck/file/60804312674.pdfIn PDF document text
    • https://www.llgnjinc.com/wp-content/plugins/super-forms/uploads/php/files/0ae0ef44abdb296fb2d24714f1c3e307/defesurozalivaxebakoraxa.pdfIn PDF document text
    • https://dfa-finanz.de/wp-content/plugins/formcraft/file-upload/server/content/files/16084919fedab5---34088469980.pdfIn PDF document text
    • https://www.hadlowsecurityshutters.com/wp-content/plugins/super-forms/uploads/php/files/7482facacd8d219fbb4b15d470d6f6a5/movimapobopam.pdfIn PDF document text
    • https://advancedcheckcashadvance.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cefa10d8b6---kuman.pdfIn PDF document text
    • http://www.hptindia.com/wp-content/plugins/formcraft/file-upload/server/content/files/160854e1e16bd6---tiweximipigov.pdfIn PDF document text
    • https://www.hed-endo.hr/wp-content/plugins/formcraft/file-upload/server/content/files/160afd38968067---59952616159.pdfIn PDF document text
    • https://ahi.com.ua/wp-content/plugins/super-forms/uploads/php/files/bf0644fdc6a23dd7db2dcfd49c20ae64/nigemoxenu.pdfIn PDF document text
    • https://theshairpodcast.com/wp-content/plugins/super-forms/uploads/php/files/cd2eb92f667a4979ea2bba76083c38ab/11388929165.pdfIn PDF document text
    • http://originalcheck.it/public/img_admin/file/%5C/98985284223.pdfIn PDF document text
    • http://tasteofruraleurope.eu/upload/File/29163411425.pdfIn PDF document text

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