Malicious PDF — malware analysis report

Static analysis result for SHA-256 8b4556b3c154c275…

MALICIOUS

PDF

62.5 KB Created: 2021-09-15 17:49:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 7550da65d23288f20cc56a4a8efe0306 SHA-1: ab0383d6b572e15c0b70c1af02dff3d4efc634a9 SHA-256: 8b4556b3c154c275ed0ce3d5ae749d02180e20551b4ea852c9dbd887ca0bf40f
132 Risk Score

Malware Insights

MITRE ATT&CK
T1059.007 JavaScript T1566.001 Spearphishing Attachment

The file is identified as a malicious PDF by ClamAV, containing embedded JavaScript. It also hosts a link farm pointing to various domains, some of which are compromised WordPress uploads, suggesting an attempt to distribute malicious content or phish users. The presence of embedded JavaScript indicates an intent to execute code within the PDF viewer.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.4598

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 http://themadthinker.com/temp/vinney/HTML/userfiles/file/ferotaforazuw.pdf
    • http://autosvanbeek.nl/mindcms/js/ckf/userfiles/files/wewotusapatipazorekari.pdf
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613d5466ae3ab---juzisilowidosezuwejetiv.pdf
    • http://tdbakademi.org/userfiles/files/kerazeledese.pdf
    • https://skywaytravelandholidays.com/ckfinder/userfiles/files/74221937091.pdf
    • https://xn--psg-9lac.hu/files/files/98179436312.pdf
    • http://volkshilfe-vlbg.at/images/content/files/45207458506.pdf
    • http://www.39koratmachinery.com/file_upload/files/luvawiliralir.pdf
    • http://soepcentrale-dekeyser.be/userfiles/file/vepubakukipetenitep.pdf
    • http://palenice.net/obrazky_clanky/file/zudifemusagokidumununare.pdf
    • http://medicare-darmstadt.de/bilder/UserImages/file/90544810529.pdf
    • http://dispensapertutti.com/userfiles/files/fexaba.pdf
    • https://brunoamaranti.it/wp-content/plugins/super-forms/uploads/php/files/1da1k5sfbv4gad5psh04rv4jh3/25156031207.pdf
    • http://eduomania.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613362f9eb2d0---31932818763.pdf
    • http://donovaly-ubytovanie-safran.sk/web/userfiles/file/fitel.pdf
    • https://blokhol.com/upload/files/35966474570.pdf
    • https://fivetc.net/uploads/files/nuduvutevikufinoxisa.pdf
    • https://nslogisticservice.com/userfiles/files/biziviros.pdf
    • https://toananhmedical.com/uploads/files/35980347536.pdf
    • http://reklamavysocina.cz/UserFiles/File/25733401494.pdf
    • http://asja-doll.ru/userfiles/file/74857500927.pdf
    • https://www.hkha.org/ckfinder/userfiles/files/6659907483.pdf
    • https://editora-arara-azul.com.br/site/admin/ckfinder/userfiles/files/61726413189.pdf
    • http://inercial.es/uploads/files/rutiduvivavamijadi.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/A3Ryygt5BCM/uplcv?utm_term=comunicaci%C3%B3n+verbal+pdf

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