Malicious PDF — malware analysis report

Static analysis result for SHA-256 a5093a73f7a65a6d…

MALICIOUS

PDF

105.5 KB Created: 2021-06-17 11:05:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: a79b8418d556e7c9564600c3f34b9f08 SHA-1: 35cf764bf7b219bda616b27e4bb26756701f0e38 SHA-256: a5093a73f7a65a6d9d47e9c06ff16bcb80fa9926311eb8f8d3bf09f0468059fc
154 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier. It functions as a link farm, containing numerous URLs pointing to compromised WordPress sites and potentially malicious PDF files. The presence of these links suggests an attempt to lure users to malicious content, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9353

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://nomylo.ru/uplcv?utm_term=japanese+adverbs+list+pdf PDF link annotation
    • https://extremetour74.ru/wp-content/plugins/super-forms/uploads/php/files/aa721345fd72f60e0d33f19e720fbd4e/15921262989.pdfIn PDF document text
    • http://www.siscard.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609fae0e38540---3875164002.pdfIn PDF document text
    • http://www.dadosefatos.net.br/wp-content/plugins/formcraft/file-upload/server/content/files/160bbbafb6bac2---pafiwawexokaxerepedo.pdfIn PDF document text
    • http://www.movingintofreedom.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bd6290f142c---29956589804.pdfIn PDF document text
    • http://aiswaryamatrimonials.com/fck_uploads/file/nojetanafamavawadej.pdfIn PDF document text
    • https://plswa.com/wp-content/plugins/super-forms/uploads/php/files/4fb195a6e799899868ec820d32d744bb/22907690563.pdfIn PDF document text
    • https://faltprasten12.se/anvandarbilder/70/files/51324511109.pdfIn PDF document text
    • http://zentrumok.com/userfile/files/97244274191.pdfIn PDF document text
    • https://dianthusindustrial.com/resimler/files/bigexiponexumi.pdfIn PDF document text
    • https://sancarspune.com/wp-content/plugins/super-forms/uploads/php/files/d9225bc6c7c0ea2ed4ed58f5b01a475a/16739781390.pdfIn PDF document text
    • https://independentmusicleague.com/wp-content/plugins/super-forms/uploads/php/files/697638a22760d830683897deaba64b5e/fapewezufijubukofedo.pdfIn PDF document text
    • https://balance-global.com/wp-content/plugins/super-forms/uploads/php/files/jhh2ktrnqj1r0ppd9uc5tktqbn/65873464911.pdfIn PDF document text
    • http://www.oschouston.com/osc/wp-content/plugins/formcraft/file-upload/server/content/files/1607b294edd933---bunojapotozep.pdfIn PDF document text
    • https://qboardapp.com/wp-content/plugins/super-forms/uploads/php/files/ddf91ea1cf0fc6433e1ec90618be978e/tuwasixerifop.pdfIn PDF document text
    • https://a2designbg.com/userfiles/file/35769642307.pdfIn PDF document text

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