Malicious PDF — malware analysis report

Static analysis result for SHA-256 75854f7ea5fc0491…

MALICIOUS

PDF

73.4 KB Created: 2021-06-15 12:11:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: 12c9383bc0799b70a91e9288a6c34410 SHA-1: 5e8374157b74da5df03fc331a018eeecc570df10 SHA-256: 75854f7ea5fc0491b1524e1c10c1e62363cbdd93483c43543841c062d2624d53
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains numerous links pointing to compromised WordPress sites, suggesting a link farm designed to distribute malicious content. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with phishing lures that redirect users to malicious downloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7186

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://cructi.ru/uplcv?utm_term=yugioh+power+of+chaos+legend+reborn+download PDF link annotation
    • http://novaserv.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c6b791dde95---rapumajipuz.pdfIn PDF document text
    • http://www.kmclogistics.com/wp-content/plugins/super-forms/uploads/php/files/3462d27e188e5e0473def4d0fd4e56d2/rumugerukoto.pdfIn PDF document text
    • http://www.hj-bouwt.be/wp-content/plugins/formcraft/file-upload/server/content/files/1609ae7c813827---26904941171.pdfIn PDF document text
    • http://totalfinance.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160b5e24c1c0e1---72619014345.pdfIn PDF document text
    • https://suhrsmad.dk/wp-content/plugins/formcraft/file-upload/server/content/files/160a477989fb10---gefufobinuxefujeparev.pdfIn PDF document text
    • https://evocative.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1609037c3ddc4d---tidadumodelinirisi.pdfIn PDF document text
    • https://unique.global/wp-content/plugins/super-forms/uploads/php/files/cf9b84b509820cfeaecd84d2921ff24f/gojikidivuxaxoneguxo.pdfIn PDF document text
    • http://esthebel.de/userfiles/file/69423765741.pdfIn PDF document text
    • https://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/160b8a1a96c0a4---xozikelegesixojubusijopo.pdfIn PDF document text
    • http://softwarefactory.nl/images/file/51499527773.pdfIn PDF document text
    • https://www.americanapi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160838f54aa568---43522525736.pdfIn PDF document text
    • http://animalscipublisher.com/files/upfiles/file/99013469179.pdfIn PDF document text
    • http://progfin.pl/userfiles/file/fotumaposik.pdfIn PDF document text

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