Malicious PDF — malware analysis report

Static analysis result for SHA-256 b026d097f3f2472a…

MALICIOUS

PDF

64.2 KB Created: 2021-08-12 03:29:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 584ef5dded1771138eb881030c6d6fba SHA-1: aa214ec554051622318619ccd6db13b95770034c SHA-256: b026d097f3f2472a7802b512b06d1d4b0b2d8c922a4de147e50fa56ca06e05d2
162 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample contains embedded JavaScript and multiple external URIs, indicating it is designed to redirect users to potentially malicious content. Heuristics suggest a link farm hosted on compromised WordPress sites and disposable hosting, likely serving as a lure for phishing or malware delivery. The ClamAV detection as 'Pdf.Phishing.Trojan' further supports a malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9131

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://paintmaster.hu/js/ckfinder/userfiles/files/jepotusadabufesolurom.pdf In PDF document text
    • https://yodobashi-church.com/bovawibuti.pdfIn PDF document text
    • http://mueblesdepladur.es/1/userfiles/file/xosabogud.pdfIn PDF document text
    • http://ettermanenterprises.com/ckfinder/userfiles/files/dasotarotogukojofimexa.pdfIn PDF document text
    • https://ballestermultiservicios.com/wp-content/plugins/formcraft/file-upload/server/content/files/160784b1d25820---lelinidupera.pdfIn PDF document text
    • http://www.timtransportes.com/home/wp-content/plugins/formcraft/file-upload/server/content/files/160a41fba2bedc---29554500193.pdfIn PDF document text
    • https://itandem.net/ckfinder/userfiles/files/60587036225.pdfIn PDF document text
    • https://www.potterycommercials.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160780804ee3ce---veler.pdfIn PDF document text
    • https://heritagelogs.com/wp-content/plugins/super-forms/uploads/php/files/35npeivk7osibekvrpj0jqv03s/tajuwikuzikafa.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/16073eedec93d9---mufemotosolikuxejow.pdfIn PDF document text
    • http://urotunisia.com/uploads/FCK_files/file/84172543782.pdfIn PDF document text
    • https://www.budgetskemaet.dk/wp-content/plugins/formcraft/file-upload/server/content/files/16088a3ef831da---kawepoxakekosorepuwejedud.pdfIn PDF document text
    • https://njsolarpower.com/wp-content/plugins/super-forms/uploads/php/files/e54f2defe673d0aac39f0c4e70fc911c/34904660036.pdfIn PDF document text
    • http://danburyhighclassof1961.com/clients/b/b4/b42d7d7907ff1a67dd6fd366dd3c6775/File/ruromibanobubosumulezenil.pdfIn PDF document text
    • https://wacee.net/wp-content/plugins/formcraft/file-upload/server/content/files/16084b312f2c91---75168056680.pdfIn PDF document text
    • https://davidfauquemberg.com/home/fauquemb/david/bbdg_site/userfiles/file/gixofexorewewir.pdfIn PDF document text
    • https://stcatherine.ac.ug/wp-content/plugins/formcraft/file-upload/server/content/files/16073a90ee4eb5---30972502093.pdfIn PDF document text
    • http://www.expo-hotel.com/english/wp-content/plugins/formcraft/file-upload/server/content/files/160c1593f849e0---18345438047.pdfIn PDF document text
    • http://vasilii-orlov.fun/wp-content/plugins/super-forms/uploads/php/files/d2bd91e25d5b5ff1cb4c205e127a0bde/gupape.pdfIn PDF document text
    • http://highlevel.pl/userfiles/file/buliboxugeremevalapotu.pdfIn PDF document text
    • http://blow-w124.com/js/upload/files/31221609204.pdfIn PDF document text
    • http://abapaposentados.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160755f4c49523---lefozotikutufazomabetixux.pdfIn PDF document text
    • http://www.fred-robin.com/ckfinder/userfiles/files/zowok.pdfIn PDF document text
    • http://devison-matras.com/upload/file/2292624309.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/YTWXjIUwRh0/uplcv?utm_term=descargar+driver+para+impresora+epson+l375PDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eaef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAEF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1