Malicious PDF — malware analysis report

Static analysis result for SHA-256 40befcce81685d8d…

MALICIOUS

PDF

148.1 KB Created: 2021-09-05 23:59:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 4ff0e2af9aa46ff872267f5c9467d0cd SHA-1: f2a3ba2fb3972ece0710e39d33649ecfe4fbb12d SHA-256: 40befcce81685d8d58985dfd6393220eaedfae49902e7dea5f89b29e230edd4f
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. It also features a link farm pointing to multiple compromised WordPress sites, suggesting an attempt to redirect users to malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8678

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://mutamobilya.com/images_upload/files/nisupokikijeb.pdf
    • https://beachesbrewing.com/wp-content/plugins/super-forms/uploads/php/files/bbeee6ae929095a7e264d7bfb6ecf014/64097614676.pdf
    • http://recamonde.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a5d86da75f2---65515965855.pdf
    • https://rosenstein.lu/userfiles/files/liwagabe.pdf
    • https://ketgate.eu/wp-content/plugins/super-forms/uploads/php/files/2240bd258530be973f946ce377700e8e/volasajewajif.pdf
    • https://realestateconnect.biz/wp-content/plugins/super-forms/uploads/php/files/9258rh8vf89l4smnntmigft8j3/58791083216.pdf
    • https://marikakozmetika.hu/editor_up/zuvajekafid.pdf
    • http://ecbpolska.pl/wp-content/plugins/super-forms/uploads/php/files/2950edafd434287d0dd2267448ce54fb/76302534464.pdf
    • http://pinturasoltra.com/images/slider/files/pipofipijurifetefak.pdf
    • https://gservicepz.com/wp-content/plugins/super-forms/uploads/php/files/2d8627e2b71abd717a3b362c53078589/xizaratevivosirax.pdf
    • https://solarconsulting.org/wp-content/plugins/super-forms/uploads/php/files/600d824318c502317f91029ad51ce741/99013458694.pdf
    • http://frankslawfirm.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/28135713449.pdf
    • http://topoint.net/userfiles/fckFile/20210826122730.pdf
    • http://savitaco.com/uploads/images/files/30102176685.pdf
    • http://mayjack.com/upload/files/kusirupupereminamis.pdf
    • https://pankalconstructora.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a46a7c9c1f3---10088435790.pdf
    • http://iviltra.lt/images/files/93893096272.pdf
    • https://tlpnw.com/wp-content/plugins/super-forms/uploads/php/files/fb21cb014ac8ed15ea54c27166adf0eb/getijazuzar.pdf
    • https://i-chat.tw/js/ckfinder/userfiles/files/4765259737.pdf
    • http://dorrstrechy.cz/UserFiles/File/38705569807.pdf
    • https://canadiancontractorservices.com/wp-content/plugins/super-forms/uploads/php/files/h4efb4jcmblsb2kvl0cpi9th65/53632189799.pdf
    • https://www.hospedeagora.com.br/wp-content/plugins/super-forms/uploads/php/files/0cs83ko25n1dqf046o6m30pseb/kujipukepejane.pdf
    • https://www.modianodesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c8585032992---65907129193.pdf
    • http://pinturasoltra.com/images/slider/files/wunulurale.pdf
    • http://primethailand.com/ckfinder/userfiles/files/nafogibivefumanivusigoj.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/GLLx1DTH0VQ/uplcv?utm_term=manuale+cartella+clinica+regione+lombardia+2013
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0002227f.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2227F 16792 bytes

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