Malicious PDF — malware analysis report

Static analysis result for SHA-256 6289827494f79170…

MALICIOUS

PDF

53.3 KB Created: 2021-05-14 23:09:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 68a176bb74747147a15dc5465de02df3 SHA-1: 61105b92f667914d30a62f0146e57f148f1dae9c SHA-256: 6289827494f791701ce64d481483605e92407c6b0d808fbd6b6aed137a45ea08
174 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file is identified as malicious by ML classifiers and ClamAV, exhibiting characteristics of a phishing lure. It contains a single image and minimal text, typical of a screenshot designed to trick users into interacting with embedded links. The numerous external URLs point to compromised CMS uploads and disposable hosting, suggesting a distribution network for malicious content. No scripts were extracted, but the presence of external links indicates a likely attempt to redirect users to malicious websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9235

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 53 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://catamma.ru/uplcv?utm_term=handwriting+without+tears+mat+man+template
    • http://vodnik48.ru/content/file/widisunepunuroda.pdf
    • https://ewms.vn/wp-content/plugins/super-forms/uploads/php/files/qlsl46i9dp8btm2rbfdvl4qrql/budumibipopu.pdf
    • https://na-nule.ru/wp-content/plugins/super-forms/uploads/php/files/u90d478jlnmpqgd9j1jrck7io1/13389597585.pdf
    • https://simovi.mx/wp-content/plugins/formcraft/file-upload/server/content/files/1608242f2ace40---32510614497.pdf
    • https://rebel-guitars.com/wp-content/plugins/super-forms/uploads/php/files/3ff969a1d347d857b0e48ffbf29233f1/93622049739.pdf
    • https://www.carlosfunes.es/wp-content/plugins/formcraft/file-upload/server/content/files/16079f9e6c932a---9191427422.pdf
    • https://kodeac.com/wp-content/plugins/super-forms/uploads/php/files/clh0e8bbdfle7k33knr13nho9c/29491076753.pdf
    • http://cricalliance.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f8a41c467a---63964140795.pdf
    • https://akarchlight.com/wp-content/plugins/super-forms/uploads/php/files/5976614db2c700c7fc20f9220fa44500/xakikigojedozuzuxon.pdf
    • http://snookerfootball.eu/wp-content/plugins/formcraft/file-upload/server/content/files/1606cac3399321---92656271399.pdf
    • http://gsoam.ge/wp-content/plugins/formcraft/file-upload/server/content/files/1608969fe19f49---donunogajosiwutidorev.pdf
    • http://victorylimo1.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071a7f50e34f---32385771212.pdf
    • http://forter.vn/hinhanh/file/mumosirofevo.pdf
    • https://carpanea.it/wp-content/plugins/super-forms/uploads/php/files/210a2dc090bc81c9409dbf1433b54729/vifetinoxowojawepa.pdf
    • https://dipinkrishna.com/wp-content/plugins/formcraft/file-upload/server/content/files/16085681ebe4fc---wixesefumufimovoza.pdf
    • http://vasvaripalmuzeum.hu/upload/file/93191439504.pdf
    • http://altaprecision.com/userfiles/file/35232396938.pdf

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