Malicious PDF — malware analysis report

Static analysis result for SHA-256 704b35a19d79fdcb…

MALICIOUS

PDF

64.0 KB Created: 2021-09-04 01:08:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 2c14155d84019af3dddad8589502d45c SHA-1: ac1cf77f1d5951091c6eebe2a3458c7db50f8727 SHA-256: 704b35a19d79fdcb0c126dd4390592e23e0dd65e4172cb433e24387c0f260982
154 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs, many of which point to compromised WordPress sites or disposable hosting, indicating a link farm designed to obscure the final destination. ClamAV detected this as Pdf.Phishing.Trojan, and ML classification also flagged it as malicious. The presence of a link farm suggests an attempt to lure users to external sites, likely for phishing or to download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6403

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 https://truck-diagnostic.ru/wp-content/plugins/super-forms/uploads/php/files/10c6a450ead4b6ec4571b209daf9ac4f/2366028126.pdf In PDF document text
    • https://vannordenvastgoed.nl/userfiles/file/4433745523.pdfIn PDF document text
    • http://rethabise.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1606da31f593a5---5113639779.pdfIn PDF document text
    • http://lbs.ac.at/wp-content/plugins/super-forms/uploads/php/files/opt0i2gsb4ua781mhs1ih9foh9/dexotaremelalisifexuzi.pdfIn PDF document text
    • https://medbillings.us/lightspeedweb1/file/23846665319.pdfIn PDF document text
    • http://www.saveurspoitoucharentes.com/admin/ckfinder/userfiles/files/67058274457.pdfIn PDF document text
    • https://fo-prefectures.com/pages/files/jumapikinuvorepexulef.pdfIn PDF document text
    • https://ahi.com.ua/wp-content/plugins/super-forms/uploads/php/files/92342cc0a0711e6517c2638aa3d9a898/tusavutesageratajiguna.pdfIn PDF document text
    • http://redhillplantation.com/clients/1/1a/1a02e1fabf1298af97853074613e4b20/File/84305411979.pdfIn PDF document text
    • https://aplusadvance.com/naver_editor/data/file/75703175982.pdfIn PDF document text
    • https://sancarspune.com/wp-content/plugins/super-forms/uploads/php/files/641d4ec37243cd546111f178ba5844da/mofob.pdfIn PDF document text
    • http://delawaretravelmedicine.com/wp-content/plugins/formcraft/file-upload/server/content/files/160722e5e46fd8---69949784985.pdfIn PDF document text
    • https://chefinhogourmet.com/wp-content/plugins/super-forms/uploads/php/files/1b74c0509a500f6f5d404bcd47733ca7/71746110694.pdfIn PDF document text
    • http://inezorviskids.com/clients/37546/File/tunurojotexipurubuloxili.pdfIn PDF document text
    • http://german-ex.com/images/blog/file/nozutumatibivawebuxovi.pdfIn PDF document text
    • http://www.canadiantreasurer.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c5fe65cd8f8---pogimirotukeleg.pdfIn PDF document text
    • http://opusincertum.it/userfiles/files/gazojiginuduvovazenu.pdfIn PDF document text
    • http://bertoniamministrazione.it/bertoni/public/file/jiwizuzunalijofolilotajom.pdfIn PDF document text
    • https://amirep.com/wp-content/plugins/super-forms/uploads/php/files/9725b14ba1b55eb7c7a5ece2e5ffed63/selifibeze.pdfIn PDF document text
    • http://anhbanglaw.com/userfiles/file/31985884520.pdfIn PDF document text
    • http://www.oschouston.com/osc/wp-content/plugins/formcraft/file-upload/server/content/files/1609b157e91f4f---46123121520.pdfIn PDF document text
    • http://www.ausafrica.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16079efbaf0858---zulitupewitefav.pdfIn PDF document text
    • http://vytvarnyobchod.cz/UserFiles/File/suxebudidiluxesegas.pdfIn PDF document text
    • http://rabotatver.ru/userfiles/admin/96415299001.pdfIn PDF document text
    • https://marblobath.com/app/webroot/img/files/48272326223.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/DOqCt-cVA4I/uplcv?utm_term=elementary+mathematical+modeling+pdfPDF link annotation

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