Malicious PDF — malware analysis report

Static analysis result for SHA-256 2c585fee4e256dd2…

MALICIOUS

PDF

81.8 KB Created: 2021-07-26 04:14:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-02
MD5: 9b28fcb5084efb3e9429ce6259d4e311 SHA-1: 23c4172550ade14bfb34a6247296fdf50b1e082d SHA-256: 2c585fee4e256dd250663c00e77725fd092d837ffc16242545df706b09e4bc92
154 Risk Score

Malware Insights

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

The PDF file was identified as malicious by ML classifiers and ClamAV, indicating it's a phishing or trojan delivery mechanism. It contains numerous links, many pointing to compromised WordPress uploads and disposable hosting, suggesting a link farm designed to redirect users to malicious content. The document body is heavily obfuscated and unreadable, providing no direct clues to its specific purpose beyond the presence of these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8043

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 http://aberdeeneyes.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1609acdff219e9---32630119880.pdf In PDF document text
    • https://nothingbutsafetyglasses.com/userfiles/file/wogimisanu.pdfIn PDF document text
    • http://firmykominkowe.pl/Obrazki/edytor/file/sixixarenofapibudikegogi.pdfIn PDF document text
    • https://amthanhanhsangchinhhang.vn/upload/files/sofisexinumotewemaguni.pdfIn PDF document text
    • http://expertcomptablecourreges.fr/michel_courreges/userfiles/file/92966819004.pdfIn PDF document text
    • https://sasalidayanisma.org/uploads/file/7653206256.pdfIn PDF document text
    • https://amatnieks.lv/pictures/image/725875125.pdfIn PDF document text
    • http://americanewbie.com/userfiles/file/xavidepo.pdfIn PDF document text
    • https://al-wesam.com/userfiles/files/bitajanitujufisam.pdfIn PDF document text
    • https://vicotelecom.vn/static/source/images/file/61748762400.pdfIn PDF document text
    • https://pelicanfinancialnetwork.com/ckfinder/userfiles/files/dilaxudofuxedixaxavomoxoz.pdfIn PDF document text
    • https://www.asahinafunnels.com/wp-content/plugins/super-forms/uploads/php/files/asge19lf5gu54c6kfraiboeq98/nokasir.pdfIn PDF document text
    • https://cvenhancer.com/wp-content/plugins/super-forms/uploads/php/files/191e935b72c1b30d0e3fc2e983962ebb/59175156587.pdfIn PDF document text
    • https://hoffmanowska.pl/wp-content/plugins/formcraft/file-upload/server/content/files/16095453f9b1a3---xigorunimabategadoza.pdfIn PDF document text
    • https://pluviaterra.mx/wp-content/plugins/super-forms/uploads/php/files/e730ec84be9d78a2273e0259760827a2/pifipetirenu.pdfIn PDF document text
    • http://fresh-j.info/images/uploadedimages/file/weburojevusagukapu.pdfIn PDF document text
    • https://macleanpinesdrivingschool.com.au/wp-content/plugins/super-forms/uploads/php/files/958c21b6cd1358facf7039a6986f1d41/81786174746.pdfIn PDF document text
    • http://careerhack.net/wp-content/plugins/formcraftIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/GLLx1DTH0VQ/uplcv?utm_term=did+sherlock+fall+in+love+with+irene+adlerPDF link annotation

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