Malicious PDF — malware analysis report

Static analysis result for SHA-256 48bd05d97f2099a2…

MALICIOUS

PDF

58.1 KB Created: 2021-06-15 18:24:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: bb281a59a7c2fc29069797563033a98d SHA-1: ae522ebe47b2ef1ea8f25a73c12ed031db4df588 SHA-256: 48bd05d97f2099a281da83fd79dba350e2b1f215a99a155599be70ccdbdf9457
154 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains numerous links, many pointing to compromised WordPress sites, suggesting it functions as a link farm. The embedded URLs likely lead to phishing sites or further malware downloads. The document body appears to be corrupted or obfuscated, preventing a clear understanding of its specific lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8850

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://infrive.ru/uplcv?utm_term=crafting+cracked+stone+brick PDF link annotation
    • https://www.burit.net/wp-content/plugins/formcraft/file-upload/server/content/files/160c87665006c8---88688391199.pdfIn PDF document text
    • http://benevolo.it/userfiles/files/rulafojovuweduj.pdfIn PDF document text
    • http://angelescare.com/userfiles/file/daxekiribetuz.pdfIn PDF document text
    • https://loskutova.site/wp-content/plugins/super-forms/uploads/php/files/03128347543ea6cdc94883465e04c6dd/36526764692.pdfIn PDF document text
    • http://nemdanangpho.com/uploads/2021-06-02/images/files/39508477.pdfIn PDF document text
    • https://hmjrgoldhockey.org/wp-content/plugins/super-forms/uploads/php/files/04113b67a2367b0f0542c2674dc95365/pavufetaxalikiz.pdfIn PDF document text
    • https://brunoamaranti.it/wp-content/plugins/super-forms/uploads/php/files/8lv1pi9lvt5q84h3mtckhcpqa1/bevubawifosajudig.pdfIn PDF document text
    • https://viajespereira.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607bb3f5c143b---zemadaruzonomaluzod.pdfIn PDF document text
    • https://antoinepanau.com/wp-content/plugins/super-forms/uploads/php/files/e3c7c922885057e26a9ef97f2c9635c2/29493735393.pdfIn PDF document text
    • https://www.djluk.co.uk/wp-content/plugins/super-forms/uploads/php/files/ppoodg58ujv80d84c23lvttb2l/sebiwezitu.pdfIn PDF document text
    • https://tehnol.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1608926c8260ba---45990128580.pdfIn PDF document text
    • https://gpuhub.net/wp-content/plugins/super-forms/uploads/php/files/6t4ov05qd1come0qvr8k8j1co3/gavavuzer.pdfIn PDF document text
    • http://loveperfectionschool.com/upload/file/88018710093.pdfIn PDF document text
    • http://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608778556af0f---99458231205.pdfIn PDF document text
    • https://agrotehholding.ru/wp-content/plugins/super-forms/uploads/php/files/300b1fc61647a7f02a2575c5f9e7c54e/87958070384.pdfIn PDF document text

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