Malicious PDF — malware analysis report

Static analysis result for SHA-256 d3d8611ba02e7216…

MALICIOUS

PDF

63.8 KB Created: 2021-09-04 20:07:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 04503a443b20cb4bf20a32e8aa4024f3 SHA-1: 567f0ead170adc0386e1a615610830f17f8c0085 SHA-256: d3d8611ba02e7216f6e18b58b561f12dea83e5a06295a1209f9387c418c63f60
154 Risk Score

Malware Insights

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

The PDF contains numerous external links, many pointing to compromised WordPress sites utilizing the formcraft plugin for file uploads. The ClamAV detection and ML classifier indicate malicious intent, likely phishing or malware delivery through these links. The presence of 'utm_term' parameters suggests a focus on SEO manipulation for traffic redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7025

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://medvor.ru/uplcv?utm_term=intermediate+accounting+chapter+13+solutions+pdf PDF link annotation
    • http://www.lentilles-progressives.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1607b2f0ba56b0---dujulu.pdfIn PDF document text
    • https://fortlauderdale-carservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c8cbb0e53e1---bopekud.pdfIn PDF document text
    • http://mgmkt.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160bb07b20b30c---nutizowoven.pdfIn PDF document text
    • http://amblesidewindermere.ca/fckuploads/images/file/tigudatapulabitorekis.pdfIn PDF document text
    • http://www.halpellet.hu/userfiles/files/71494411319.pdfIn PDF document text
    • https://unitedcardsolutions.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d3c8361b55---32437436947.pdfIn PDF document text
    • https://radmangroup-ye.com/rgfiles/file/8177901199.pdfIn PDF document text
    • http://ilsogno-bomboniere.com/userfiles/files/libujuxirovalafujitoriju.pdfIn PDF document text
    • https://glycocalyx.nl/userfiles/image/file/rajimizuxezanege.pdfIn PDF document text
    • https://greshamgilessalon.com/wp-content/plugins/super-forms/uploads/php/files/19a08cd68059caaf027f5dfcf1fe74e5/71157051047.pdfIn PDF document text
    • http://cualuoiskydoor.com/webroot/img/files/63284154856.pdfIn PDF document text
    • http://valencia.thepokeluau.com/uploads/files/59537043507.pdfIn PDF document text
    • http://daindnc.com/fckeditor/userfiles/file/fukajabapebono.pdfIn PDF document text
    • http://intergeored.com/upload/File/xogowatisezebefilozeb.pdfIn PDF document text
    • https://kodeac.com/wp-content/plugins/super-forms/uploads/php/files/6o8ofh86j04bhouj25tjrkf079/kefisidorebe.pdfIn PDF document text
    • https://parquesanalbertohurtado.cl/ckfinder/userfiles/files/gakexeji.pdfIn PDF document text
    • https://414movement.com/wp-content/plugins/super-forms/uploads/php/files/1232ee2672ca065875e56b5820260d71/kipipunibokaragokoval.pdfIn PDF document text
    • https://www.corridar.com/wp-content/plugins/super-forms/uploads/php/files/ou4re6l261irrlegfabgeehhdm/xijadumelenojevi.pdfIn PDF document text
    • http://www.gaviprintpack.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cb3e134acb9---farenugupuwexewifemerixok.pdfIn PDF document text
    • https://totalyoumovement.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ad9f6b5296a---49746624053.pdfIn PDF document text
    • http://4bx.pl/public/file/dasurorugu.pdfIn PDF document text
    • https://ambient-interier.cz/files/files/kejudu.pdfIn PDF document text
    • https://stvorki.ru/files/file/kiputije.pdfIn PDF document text
    • http://galenbio.com/images/upload/file/lojiwanokawixosozuvijeso.pdfIn PDF document text
    • 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_off0000d532.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD532 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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