Malicious PDF — malware analysis report

Static analysis result for SHA-256 77e427a846c37312…

MALICIOUS

PDF

58.8 KB Created: 2021-05-13 09:37:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b8201751608df3fb2f157abf6a86a958 SHA-1: 9fb063e6e858924b21192e295ee516aac5726d71 SHA-256: 77e427a846c37312cb131947b099d6f881f88f4af44afc8285b0eaf8ac055305
154 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and ML classifiers. It contains numerous embedded URLs pointing to compromised WordPress sites and disposable hosting, suggesting it functions as a link farm. The primary purpose appears to be directing users to malicious content, likely for phishing or malware distribution, leveraging a spearphishing attachment vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6609

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://garglob.ru/uplcv?utm_term=alfabeti+shqip+pdf
    • https://sharzh-ufa.ru/wp-content/plugins/super-forms/uploads/php/files/ac9ec1ead77be831f4fc8f82b94124c8/gaxaxu.pdf
    • https://spencershaulageltd.co.uk/wp-content/plugins/super-forms/uploads/php/files/36e4cc2dc762ce106db9ff7ed5fc1404/26773514239.pdf
    • https://christianboudreau.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d139b39752---begufefogut.pdf
    • http://www.lightingandhvacexpo.com/wp-content/plugins/super-forms/uploads/php/files/56d958081a0545fb1801155bd4b02675/79884253054.pdf
    • http://amphorabeautyclub.com/campannas/file/61633815332.pdf
    • https://www.costaverde.it/wp-content/plugins/formcraft/file-upload/server/content/files/1608304aeae2ea---43200913961.pdf
    • https://www.simcoerecovery.net/wp-content/plugins/super-forms/uploads/php/files/9dq18k3k63j9jiiv5bjj29lm4q/63767173399.pdf
    • http://charivne.info/images/file/35881174559.pdf
    • https://earthchartercities.org/wp-content/plugins/formcraft/file-upload/server/content/files/1607bce85839b9---4468997778.pdf
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160864cafbc19f---56276695616.pdf
    • https://inlandautorepairmurrietaca.com/wp-content/plugins/super-forms/uploads/php/files/4034d820dda11c46bf9bd8af0a7b56dc/visofokavowadavig.pdf
    • https://thesmithgrouphouston.com/wp-content/plugins/super-forms/uploads/php/files/3e7b6746754369824a88ad5ef8da8c85/jurogok.pdf
    • https://www.kiakaha.gr/wp-content/plugins/super-forms/uploads/php/files/6ajk17ut39tjltmtuuvafqkl6c/60168379701.pdf