Malicious PDF — malware analysis report

Static analysis result for SHA-256 cca0f76e27647d87…

MALICIOUS

PDF

55.5 KB Created: 2021-09-04 20:18:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: c67e48f9cd68b8ba1ee03559ae869c06 SHA-1: 215255e019a4273322528d79e5c1b308bcd8dede SHA-256: cca0f76e27647d87f6e803063a75ad9ce583302c415a0050c6939639148061f0
162 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous links pointing to compromised WordPress upload directories and other disposable hosting. These elements suggest the PDF is intended to redirect users to malicious sites, likely for phishing or to download further malware. The ClamAV detection and ML classifier further support its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6108

Heuristics 6

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://actinq.nl/upload/file/wazegumapaduwezop.pdf In PDF document text
    • http://hiroshima-teishaku.com/userfiles/file/11054594425.pdfIn PDF document text
    • http://beckydavidsonhomes.com/wp-content/plugins/formcraft/file-upload/server/content/files/16089e6a2dc25b---23708471913.pdfIn PDF document text
    • http://bvmnotarissen.nl/app/webroot/files/ckeditor_files/files/jaxijiverame.pdfIn PDF document text
    • http://artside.org/data/temp/file/solugonaximetesukazi.pdfIn PDF document text
    • http://www.creativitaecomunicazione.it/js/lib/ckfinder/userfiles/files/17544052204.pdfIn PDF document text
    • https://saftanton.dk/wp-content/plugins/formcraft/file-upload/server/content/files/160a910f25e719---49093683224.pdfIn PDF document text
    • https://www.financedeclined.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160816ca58cc46---wawuzunosojokefonipo.pdfIn PDF document text
    • http://candientushinko.com/images/file/jilisagexape.pdfIn PDF document text
    • http://playitdirect.ca/ckfinder/uploadfiles/files/nekag.pdfIn PDF document text
    • http://starrsgazette.com/admin/images/file/19346190234.pdfIn PDF document text
    • https://proff-doors.ru/wp-content/plugins/super-forms/uploads/php/files/3d5101552056bcacfbf271ce5db0e018/fomopisukodozo.pdfIn PDF document text
    • http://solarwindependence.com/ckfinder/userfiles/files/vokatanazakonovevotaredev.pdfIn PDF document text
    • https://sayurhijau.com/contents//files/67484579314.pdfIn PDF document text
    • http://intemhathanh.com/img_duhoc/files/74295989118.pdfIn PDF document text
    • https://www.adler-leitishofen.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608948b09469e---dopina.pdfIn PDF document text
    • http://www.afamaresme.org/wp-content/plugins/formcraft/file-upload/server/content/files/1610e33b852452---tizafiwaz.pdfIn PDF document text
    • http://ambvet-trefontane.eu/userfiles/files/90466511275.pdfIn PDF document text
    • https://www.andeanskyline.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606da0c3df928---16574179336.pdfIn PDF document text
    • http://hondaototanan.com/upload/files/52304544622.pdfIn PDF document text
    • https://twr1115.net/files/fckeditor/file/patajoka.pdfIn PDF document text
    • http://sweet-sugar.de/images/uploadedimages/file/zokoxavi.pdfIn PDF document text
    • https://fitnessrev.net/wp-content/plugins/super-forms/uploads/php/files/ieeanqf9hi73vdg48pq7imep1k/bawov.pdfIn PDF document text
    • http://alpha-cp.com/userfiles/file/66054589923.pdfIn PDF document text
    • https://derechosenred.org/aym_image/files/46828980049.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/DOqCt-cVA4I/uplcv?utm_term=volkswagen+tiguan+2016+manualPDF link annotation

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