Malicious PDF — malware analysis report

Static analysis result for SHA-256 e7ab3528c1a5f73e…

MALICIOUS

PDF

54.0 KB Created: 2021-09-01 07:36:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: a69593d9d65d0bc1bdc293bd6184b5ec SHA-1: beed7abd6f85a5c315a39ffe01ce1b8d705d6c3a SHA-256: e7ab3528c1a5f73e142d4df5e1525ff640124adcea406f25d55e978e398948cb
162 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript, which is a common technique for executing malicious code within documents. It also features a link farm pointing to multiple external URLs, some of which are hosted on compromised CMS upload directories. These elements suggest the PDF is designed to lure users to potentially malicious sites, likely for phishing or to download further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7500

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 https://irlanc.ru/uplcv?utm_term=coreldraw+mcq+questions+and+answers
    • https://minervatech.work/js/ckfinder/userfiles/files/newesap.pdf
    • https://goldgreiner.de/userfiles/file/5076923167.pdf
    • http://impressivetravelvietnam.com/upload/files/fomewimekejipewadazo.pdf
    • https://divorcioconsensual.com.br/wp-content/plugins/super-forms/uploads/php/files/e88889e2c51bff8e65a39e853f270f0e/dawarir.pdf
    • http://aylincinarli.com/fckfiles/file/73371957021.pdf
    • http://nemeckystrakac.sk/editor_uploads/files/visabiwirume.pdf
    • https://www.businesswatchguardingservices.co.uk/wp-content/plugins/super-forms/uploads/php/files/1vhh35904a012kr1jt95pfdrbk/vosonilidudug.pdf
    • http://nabisori.com/userfiles/file/xupix.pdf
    • http://vienkiemis.lt/app/webroot/uploads/userfiles/files/digelog.pdf
    • https://advancedbusiness.co/wp-content/plugins/super-forms/uploads/php/files/47d4a5d0b38453e77b80889bae9d4b64/3408803057.pdf

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