Malicious PDF — malware analysis report

Static analysis result for SHA-256 e84f8e6367629da8…

MALICIOUS

PDF

39.8 KB Created: 2021-06-27 02:46:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-25
MD5: 7dbf1cc1fb02df3319c5c4444a0207d7 SHA-1: ad0e629e7c40fe1060dc216e9b95e91c5788337b SHA-256: e84f8e6367629da89944f2f749651fcadd0f03bdfee8bea08ba740bba1a0ee73
174 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm, many hosted on compromised CMS upload directories and uses an image-based lure. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8821

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
  • 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 39 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • 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://3dreamvr.com/wp-content/plugins/super-forms/uploads/php/files/a2f916499348c474a18f3c5faa718bd5/15954097797.pdf In PDF document text
    • http://www.jesuseslaroca.org/wp-content/plugins/formcraft/file-upload/server/content/files/160bb3710b1c83---66663285971.pdfIn PDF document text
    • https://atlastoursntravels.com/userfiles/file/duvope.pdfIn PDF document text
    • http://www.petersmetalstitching.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160a6789d041c8---32699719879.pdfIn PDF document text
    • https://ankaratemizlikcim.com/depo/sayfaresim/file/74419429006.pdfIn PDF document text
    • https://microfocus-realize2020mea.com/wp-content/plugins/super-forms/uploads/php/files/d24208ba8ad17e2089c38233a2c4bae1/81549883366.pdfIn PDF document text
    • http://www.agrosystem.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160b1fbdb65613---zurefowerade.pdfIn PDF document text
    • http://chanakyaaerospacedefence.com/userfiles/file/dogad.pdfIn PDF document text
    • http://hzkontejnery.cz/ckfinder/userfiles/files/4819375051.pdfIn PDF document text
    • https://cls-toronto.com/wp-content/plugins/super-forms/uploads/php/files/18860f9846f12b1be28a2b7eddb3b33d/zaxonefamavuv.pdfIn PDF document text
    • http://niszczeniewaw.pl/userfiles/file/70848485426.pdfIn PDF document text
    • http://www.medicalalliedtraining.com/wp-content/plugins/formcraft/file-upload/server/content/files/16079455ac5717---48126489085.pdfIn PDF document text
    • https://www.financedeclined.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16085ed1451732---61946138211.pdfIn PDF document text
    • https://rajatotogroup4.com/contents//files/60428366081.pdfIn PDF document text
    • https://www.quatainvestimentos.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160d721b47c7b4---xikisixorineporunaz.pdfIn PDF document text
    • https://www.tangelo.no/wp-content/plugins/formcraft/file-upload/server/content/files/160906fac9a86b---30265419409.pdfIn PDF document text
    • https://bodwellassociates.com/wp-content/plugins/super-forms/uploads/php/files/c6d21c18366777abbf93985e4a6af61c/17155654437.pdfIn PDF document text
    • https://prana.video/wp-content/plugins/super-forms/uploads/php/files/rgoflfk2s461tmnnpmihv7mgjl/46146665250.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/LPIa9PGmDLg/uplcv?utm_term=construction+project+life+cycle+pdfPDF link annotation

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