Malicious PDF — malware analysis report

Static analysis result for SHA-256 9d9a3292014405ed…

MALICIOUS

PDF

63.6 KB Created: 2021-09-03 18:04:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 552d50d2b1e305847e07fa67a5bbfb16 SHA-1: 8313bbc1ad0d17651296d05dce67c23459c0f46f SHA-256: 9d9a3292014405ed2e37ef7b9a57313157286545e51f1bf643d69ced2af9b1d7
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains numerous embedded URLs pointing to various domains, many of which are hosted on compromised WordPress sites. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. The presence of external URI heuristics and link farm indicators confirms the primary attack vector involves directing users to external, potentially malicious, web content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9203

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://pixomot.ru/uplcv?utm_term=domine+deus+agnus+dei+vivaldi+pdf PDF link annotation
    • http://zawayakw.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609b2a39d680f---rafepagov.pdfIn PDF document text
    • https://www.zaantraining.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160fc21717045e---lesafivo.pdfIn PDF document text
    • http://kemmurad.com/webroot/img/files/39390808248.pdfIn PDF document text
    • https://hcs1000.org/wp-content/plugins/super-forms/uploads/php/files/c25c60de0c510bc521214ef055a30111/vewofir.pdfIn PDF document text
    • http://seoulsquare.com/userfiles/file/34703143300.pdfIn PDF document text
    • http://etasystem.net/userfiles/files/kamegi.pdfIn PDF document text
    • https://anzmrrn.org/wp-content/plugins/formcraft/file-upload/server/content/files/160d5efbd9f5a2---63836607422.pdfIn PDF document text
    • https://angelsstaff.com/uploads/file/fexajizoxisesak.pdfIn PDF document text
    • https://betenenergy.com/sites/default/files/file/32613328087.pdfIn PDF document text
    • https://sonarmusic.hu/up_image/file/sagusowed.pdfIn PDF document text
    • http://dienmaythanglong.org/uploads/files/92813288650.pdfIn PDF document text
    • https://www.medicalbi.com/ckfinder/userfiles/files/84182486110.pdfIn PDF document text
    • http://www.petersmetalstitching.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160850af46df2d---semuzojipetogi.pdfIn PDF document text
    • http://www.xpresswedding.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608900605d894---62528237443.pdfIn PDF document text
    • https://matrainagycsalados.hu/userfiles/file/fotimajuwanomalavul.pdfIn PDF document text
    • https://www.jahnigterbraak.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1608b39453a848---mipusujofanaker.pdfIn PDF document text
    • http://mgrima.com/files/file/15540380107.pdfIn PDF document text
    • http://xn--365-pn7mwb654m2qn.com/ckupload/files/sakijovowutajaveluzerom.pdfIn PDF document text
    • http://www.halpellet.hu/userfiles/files/37563425317.pdfIn PDF document text
    • http://rockfordauburn1966.com/clients/8/85/8549db0cc7d1f63cce07d3be93bd6f3d/File/66852932667.pdfIn PDF document text
    • https://amezdigital.com/wp-content/plugins/super-forms/uploads/php/files/ad6b4fa7517a2a02f47be6db827c7b9e/pobakejamuzuwavike.pdfIn PDF document text
    • http://bukhatirhomes.com/userfiles/file/remixe.pdfIn PDF document text
    • http://exdebt.bg/userfiles/file/5697029390.pdfIn PDF document text
    • http://mariamozharova.ru/uploads/files/vijefakojoxetojenig.pdfIn PDF document text
    • http://ttlengenharia.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160b829a290615---97811334942.pdfIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e2d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2D4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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