Malicious PDF — malware analysis report

Static analysis result for SHA-256 409131ae9af0db17…

MALICIOUS

PDF

51.2 KB Created: 2021-08-15 15:03:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: b89742fd740309c0e6df9b97b4266bf6 SHA-1: 891d3c4201c7016e6e7927f4cc8c72a61edb2165 SHA-256: 409131ae9af0db1760b1783928f4f1e0f48d78a8de4361c88131b4d085c7ed94
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating it likely serves as a phishing or malware distribution lure. The document functions as a link farm, containing numerous URLs pointing to external resources, many of which are hosted on compromised CMS uploads or disposable domains. The primary attack pattern involves directing users to these external sites, potentially for credential harvesting or further payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9452

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
  • 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 http://jiuxingchaoshi.com/uploads/file/072342403076.pdf In PDF document text
    • https://termocasasrl.com/file/sugogufasepekixosa.pdfIn PDF document text
    • https://seroinstitute.com/wp-content/plugins/super-forms/uploads/php/files/d7cb5fd3c0936eb3eb076106901738de/jusimojeze.pdfIn PDF document text
    • https://kingdomofgodmn.org/userfiles/files/minoxegedenikabetixomikoz.pdfIn PDF document text
    • https://www.zaantraining.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160b9e12a9487b---20266475274.pdfIn PDF document text
    • https://spaslask.pl/wp-content/plugins/super-forms/uploads/php/files/aucv78vskm9i1ur9l3qfej1r89/tasubelitub.pdfIn PDF document text
    • https://motionslam.com/wp-content/plugins/super-forms/uploads/php/files/e2232840e41c929eb6af4b14e83ffe21/betikapojirajipub.pdfIn PDF document text
    • https://www.hamburgeriaagricola.com/wp-content/plugins/super-forms/uploads/php/files/eodnm8gor7u43vvooj6tf4fmoj/99516686246.pdfIn PDF document text
    • http://julieesteban.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a3213bf33b5---34999873250.pdfIn PDF document text
    • https://xn--i1aam8cb.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/6766d9ea823a8aa9a2ffebce1ecdd68d/42878760794.pdfIn PDF document text
    • http://buchtel1967.com/clients/26382/File/natupuj.pdfIn PDF document text
    • http://solar-makernavi.com/ckfinder/userfiles/files/fefad.pdfIn PDF document text
    • http://kwik-it.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1607239f916880---newatoxipubasezatu.pdfIn PDF document text
    • http://jpind.pl/userfiles/file/zupotexo.pdfIn PDF document text
    • http://ajisushionline.com/uploads/files/fatibevezitenikivavujopow.pdfIn PDF document text
    • http://bycongroup.com/UserFiles/file/lukesibenakotil.pdfIn PDF document text
    • http://www.nationaalgolfcongres.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160d1a6fb96414---pupolomunoserumutasese.pdfIn PDF document text
    • http://botanicgardenscafe.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160a3a58f75dcb---31864405094.pdfIn PDF document text
    • http://la-roofers.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160ecec8d5e242---gafesojekifo.pdfIn PDF document text
    • https://parisautotravel.com/wp-content/plugins/super-forms/uploads/php/files/5svbdtkg1o8enf3b49th6ls974/derirufeta.pdfIn PDF document text
    • http://seamacros.com/upload/file/bereleb.pdfIn PDF document text
    • http://dintainoodle.com/uploads/files/98543420632.pdfIn PDF document text
    • https://pabausa.org/wp-content/plugins/formcraft/file-upload/server/content/files/160e05fcc9a4fd---22255390636.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/LPIa9PGmDLg/uplcv?utm_term=kumar+sanu+mp4+mp3+ganaPDF link annotation

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