Malicious PDF — malware analysis report

Static analysis result for SHA-256 3c9286f156f45169…

MALICIOUS

PDF

65.1 KB Created: 2021-08-21 06:23:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: ac69aaf3d8e0c93c0718c209d34d029d SHA-1: 20de645fc8da492e653741ec36807daa08de6230 SHA-256: 3c9286f156f4516946d362fd587e87d346aa76e7a6046afdfc3db1357119e33f
94 Risk Score

Malware Insights

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

The PDF contains numerous links pointing to various domains, many of which appear to be compromised WordPress sites used for hosting malicious files. The ML classifier strongly indicated maliciousness, and the structure suggests a link farm designed to lure users into downloading potentially harmful software or content. No scripts were extracted, and the document body was unreadable binary data.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9531

Heuristics 4

  • 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://garglob.ru/uplcv?utm_term=internet+download+manager+full+indir+kat%C4%B1l%C4%B1ms%C4%B1z PDF link annotation
    • https://wpsqld.com.au/wp-content/plugins/super-forms/uploads/php/files/5ac6164df64069d8311c8a11f2489d1a/wopenabapow.pdfIn PDF document text
    • https://www.makathastaliklari.net/wp-content/plugins/formcraft/file-upload/server/content/files/16080449dc4165---sijirebate.pdfIn PDF document text
    • https://semsaesp.com/ckfinder/userfiles/files/texajowerosironudin.pdfIn PDF document text
    • https://independentmusicleague.com/wp-content/plugins/super-forms/uploads/php/files/f823e3d9ca7cba6bae557525b271324b/tewijibonopozij.pdfIn PDF document text
    • http://saharun.org/uploads/ckfinder/userfiles/files/daposujurumiwabaravotofu.pdfIn PDF document text
    • http://www.davidwoodpersonnel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d037760ce5---tabonufuwed.pdfIn PDF document text
    • https://pankalconstructora.com/wp-content/plugins/formcraft/file-upload/server/content/files/160957135325d2---14733731511.pdfIn PDF document text
    • http://championshipsportsrings.com/clients/23492/File/sajozid.pdfIn PDF document text
    • http://staging.impactredevelopment.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c890e72213---54338745390.pdfIn PDF document text
    • https://www.psalighting.com/wp-content/plugins/super-forms/uploads/php/files/288bb19fb377dfc3fd7b996d71e9b047/ziwuxiketesurebunuf.pdfIn PDF document text
    • http://m2m2design.com/userfiles/kinifudoteru.pdfIn PDF document text
    • http://evabody.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160adb18cadf7a---60681352555.pdfIn PDF document text
    • https://nicemexico.net/wp-content/plugins/formcraft/file-upload/server/content/files/160d4b194cfb4a---98599356815.pdfIn PDF document text
    • http://cityhelps.org/clients/6/61/61afa7a028a8e04f14432b0fece6f2b0/File/53342431239.pdfIn PDF document text
    • https://miamiuniquelimo.com/wp-content/plugins/formcraft/file-upload/server/content/files/16080fb7fb0502---turetatufiwazidilataxukid.pdfIn PDF document text
    • https://www.supremecaravans.com.au/application/third_party/ckfinder/userfiles/files/mofariworuto.pdfIn PDF document text
    • http://www.trotasierra.com/plugins/ckfinder/userfiles/files/nunapokamidufelidi.pdfIn PDF document text
    • http://saintthomasmonrovia.org/clients/a/a7/a774d5b45fc75aba9c6fcf07501e1e58/File/32749764692.pdfIn PDF document text
    • https://www.booster-p.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d216b714ee9---sifupizogizamiw.pdfIn PDF document text
    • https://mariellatriolo.it/public/file/3252578989.pdfIn PDF document text

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