Malicious PDF — malware analysis report

Static analysis result for SHA-256 38daf990d6841522…

MALICIOUS

PDF

59.1 KB Created: 2021-07-25 06:35:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 245f49be57952f20f3f9ac2a1434cef6 SHA-1: 5c7eb1ea201a59d2a7ce2f62e5f603876dbda348 SHA-256: 38daf990d6841522b17b91c7295965e5d8e683583accbfb3939021ca6841dc4f
154 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection and an ML classifier. It contains a link farm with numerous external URIs, many hosted on disposable domains or compromised CMS upload storage, indicating a likely attempt to direct users to malicious content. The document body is heavily obfuscated and unreadable, suggesting an attempt to hide its true purpose.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9557

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://tongdaidoanhnghiep.com/app/webroot/upload/files/38993797851.pdf In PDF document text
    • https://gites-les-bardots.com/userfiles/file/8664253603.pdfIn PDF document text
    • http://krakow4you.pl/krakow/files/34848319678.pdfIn PDF document text
    • https://aquafilling.com/userfiles/file/mazunu.pdfIn PDF document text
    • https://www.okcfarmersmarket.com/wp-content/plugins/super-forms/uploads/php/files/1f9e25352aea8830d1ee89172396b266/80231447829.pdfIn PDF document text
    • https://perleyparish.org/wp-content/plugins/super-forms/uploads/php/files/46e08dcd5214a6b8ac167f86c6032cf6/51729098039.pdfIn PDF document text
    • https://sbufficio.it/file/40469477462.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a3ef70ae5a8---3899274957.pdfIn PDF document text
    • https://macleanpinesdrivingschool.com.au/wp-content/plugins/super-forms/uploads/php/files/6b27a872ee7bb70dd4e209af497b08fc/60873951479.pdfIn PDF document text
    • http://kursadowicz.pl/Upload/file/28356876549.pdfIn PDF document text
    • https://arizonalightingsales.com/wp-content/plugins/super-forms/uploads/php/files/731f88308a15ac691d625edc03a6a4bf/77047897751.pdfIn PDF document text
    • http://www.mtpartnersfl.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d9fa3082c8---xamalep.pdfIn PDF document text
    • http://www.ebsjosepirosamaria.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c5851a60630---jinub.pdfIn PDF document text
    • http://jiuxingchaoshi.com/uploads/file/18031304369.pdfIn PDF document text
    • https://www.albispanaderia.com/wp-content/plugins/super-forms/uploads/php/files/7b6adaa7015b20248e257791e55703d7/jimivaxisogosuzovuluzazum.pdfIn PDF document text
    • https://www.superioreagle.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a123697831e---78032568014.pdfIn PDF document text
    • https://deewo.de/wp-content/plugins/formcraft/file-upload/server/content/files/160823b9d6b5cc---3956271680.pdfIn PDF document text
    • https://ekransamara.ru/files/wemutawilevagexivozuxute.pdfIn PDF document text
    • http://acpiindia.com/userfiles/file/wizolozezezo.pdfIn PDF document text
    • https://acethamessecurity.co.uk/wp-content/plugins/super-forms/uploads/php/files/4ff3b8acfa7ba13c9c524ca503ee976e/81286352933.pdfIn PDF document text
    • http://abogadosaguilar.com/ckfinder/userfiles/files/nijapidukadilexekatezivu.pdfIn PDF document text
    • http://remaining-mc.de/userfiles/file/wovurikifo.pdfIn PDF document text
    • http://riggi.ru/userfiles/file/jusemoxewiputujom.pdfIn PDF document text
    • https://mithermomix.com.mx/wp-content/plugins/super-forms/uploads/php/files/7b3bceacdb5e58eaa1139bf6a4c3d8e0/gilatin.pdfIn PDF document text
    • https://pacie.vn/web/uploads/files/59550474197.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1xuhb7AK25c/uplcv?utm_term=how+to+put+deck+belt+on+cub+cadet+ltx1050PDF link annotation

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