Malicious PDF — malware analysis report

Static analysis result for SHA-256 cfa28b4c26825217…

MALICIOUS

PDF

40.0 KB Created: 2021-09-17 20:34:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 6e054da6a1867639383a05ddeda313b3 SHA-1: 2e0978e2cd2b95f65ff3402ffac00536e18ed7ab SHA-256: cfa28b4c2682521705517e9fee2e8ac730796b616c88e1c375600b36cd59d3f9
144 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document exhibits characteristics of a phishing lure, including being image-heavy with a hidden clickable action and hosted on disposable domains. The presence of numerous external URIs, particularly those with 'utm_term' parameters, suggests an attempt to redirect users to malicious content or phishing pages. While no scripts were explicitly extracted, the ClamAV detection and ML classifier indicate malicious intent, likely involving the exploitation of PDF vulnerabilities or the delivery of further malicious content via the embedded links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8834

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
  • Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 1 image(s), only 0 text block(s), carries a click-outward action, and is only 40 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • 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://huntic.ru/uplcv?utm_term=benefits+of+using+technology+in+writing PDF link annotation
    • http://bfcy88.com/uploads/files/35758037502.pdfIn PDF document text
    • https://sssmri.com/ckfinder/userfiles/files/vapuwabe.pdfIn PDF document text
    • https://tsolisp.com/files/file/fegavi.pdfIn PDF document text
    • http://www.beverburcht.nl/upload/files/mabibax.pdfIn PDF document text
    • https://tbsva.org/Upload/files/20210906152000.pdfIn PDF document text
    • http://brbud.pl/userfiles/file/14650481519.pdfIn PDF document text
    • http://autoscuolavalerio.it/userfiles/files/99416626629.pdfIn PDF document text
    • http://problemconsulting.com/img/download/files/70687145654.pdfIn PDF document text
    • http://www.neslihanonur.com/wp-content/plugins/super-forms/uploads/php/files/e50f94ea46c2817879deebbb4585a0d9/19138023453.pdfIn PDF document text
    • https://securitydm.com/slicice/file/25803665216.pdfIn PDF document text
    • http://viajaconsciente.com/imagenes/userfiles/file/tutowudekenavinivus.pdfIn PDF document text
    • https://abouelhoulgroup.com/userfiles/files/xipusorogizetomokevaz.pdfIn PDF document text
    • http://3gr-group-com.gbintl.com/ci/userfiles/files/18366932551.pdfIn PDF document text
    • http://zamokugrofa.sk/admin/fckeditor/file/videzuje.pdfIn PDF document text
    • http://emilybarnes.com/DEVELOPMENT/VERSIONED/emilybarnes/trunk/sites/default/files/file/40054854160.pdfIn PDF document text
    • http://yousefmaktabi.com/ckfinder/userfiles/files/80640635649.pdfIn PDF document text
    • http://jar-ted.pl/file/ximivafeg.pdfIn PDF document text
    • https://deepex.hu/hirek/files/wejevokopixugasajikawu.pdfIn PDF document text
    • http://fine-cottage.ru/userfiles/files/87496423145.pdfIn PDF document text
    • http://phayaotechno.com/UserFiles/File/56965961972.pdfIn PDF document text
    • http://appli-veolia.net/ckfinder/userfiles/files/62263502566.pdfIn PDF document text
    • http://ziguratex.com/helpdesk/app/webroot/img/userfiles/files/megaxojikevifobinos.pIn PDF document text

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