Malicious PDF — malware analysis report

Static analysis result for SHA-256 bc5264310b1c71f9…

MALICIOUS

PDF

176.0 KB Created: 2021-09-02 14:13:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: cb292980e8d87b1f73e296ce4ff2ead3 SHA-1: 7bed11914def7e60ca381df80bbd83fafaa4e627 SHA-256: bc5264310b1c71f910fadd04a350fb4d3773c651faf4cf248477c1cf7d6cfc2e
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains numerous links, many pointing to compromised WordPress sites, which likely serve as a link farm to phishing or malicious websites. The presence of external URIs and link farm heuristics indicates a phishing or redirection attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9587

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://catamma.ru/uplcv?utm_term=commodore+64+basic+v2+manual PDF link annotation
    • http://themultifold.com/wp-content/plugins/super-forms/uploads/php/files/taun1qkk76g87pk9hof694mpu4/40778697421.pdfIn PDF document text
    • http://mysistermyfriendministries.org/clients/85776/File/wirakabojarenolisi.pdfIn PDF document text
    • https://zzwgjx.com/d/files/46298493061.pdfIn PDF document text
    • https://humanistbeauty.com/wp-content/plugins/super-forms/uploads/php/files/bm4sd3fbpumngkn2qp8h95bc26/pijupepovobokewori.pdfIn PDF document text
    • http://bilafafafa.com/shopadmin/upload/files/lurirume.pdfIn PDF document text
    • https://kantankacreative.com/wp-content/plugins/super-forms/uploads/php/files/f6eb20c067d884e78c2c1c7b64610b40/rewuzofat.pdfIn PDF document text
    • http://poledance-chrudim.cz/files/file/mobodalu.pdfIn PDF document text
    • https://controlcert.se/wp-content/plugins/formcraft/file-upload/server/content/files/160724a227f29a---98193529890.pdfIn PDF document text
    • http://www.canadiantreasurer.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a050f52fc0---walegajunogukivum.pdfIn PDF document text
    • https://christianbelieversmatrimony.com/web/christiansbelieversmatrimony/photos/ckeditor/files/girijakoguludutimigarido.pdfIn PDF document text
    • https://www.sblending.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16130648751229---jaxexafanivegefu.pdfIn PDF document text
    • https://acgroupenterprise.com/userfiles/file/buvabedurapemej.pdfIn PDF document text
    • https://www.llgnjinc.com/wp-content/plugins/super-forms/uploads/php/files/86433be3eadc35421be1fa449322e295/soramere.pdfIn PDF document text
    • https://www.kalirich.com/wp-content/plugins/super-forms/uploads/php/files/8dp3pfp0hc9eah12qp5ftfm3q2/36995051564.pdfIn PDF document text
    • http://35ct1.com/images/ckImageFiles/files/69675922989.pdfIn PDF document text
    • http://www.blackhillsdancecentre.com/wp-content/plugins/formcraft/file-upload/server/content/files/16117ccfb0779a---34688122335.pdfIn PDF document text
    • https://www.edutechusa.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608b269ee46a4---64188860748.pdfIn PDF document text

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