Malicious PDF — malware analysis report

Static analysis result for SHA-256 d64b92c9c17ca8ad…

MALICIOUS

PDF

72.6 KB Created: 2021-06-13 15:04:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9ddc11113cb01cab3f92ce3dc5d39230 SHA-1: 6e4d7a8e83dba7812dd2236696394ee98134615a SHA-256: d64b92c9c17ca8add762a9ba43cd5a6f6a14284e91536eaa27ef4f70eb152612
154 Risk Score

Malware Insights

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

The PDF document contains numerous links pointing to compromised CMS upload directories, suggesting it is part of a link farm designed to distribute malicious content. The ClamAV detection and ML classifier strongly indicate malicious intent, likely for phishing or malware distribution. The document body, though heavily obfuscated, contains text related to 'Madina book 1 english translation pdf', which is likely a lure to entice users to click the embedded links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9605

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://allytemp.ru/uplcv?utm_term=madina+book+1+english+translation+pdf
    • https://gz-topstar.com/wp-content/plugins/super-forms/uploads/php/files/690bc4dc30682728c8d3324d962f3a61/31427530358.pdf
    • http://fortlauderdalelimorental.net/wp-content/plugins/formcraft/file-upload/server/content/files/160797f5873e45---91690063013.pdf
    • http://www.canadiantreasurer.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071a00fd4278---92567688374.pdf
    • https://vaytieudungtragop.com.vn/wp-content/plugins/super-forms/uploads/php/files/qsqnmf41ou061paenpmmmqeaki/polejonujigaze.pdf
    • https://strategieb2b.com/userfiles/file/pirekitagojafubasu.pdf
    • http://botosani.ro/img/uploads/file/pifefenorukopusipovevabur.pdf
    • https://totalyoumovement.com/wp-content/plugins/formcraft/file-upload/server/content/files/160af90b556727---mapifajutusonuk.pdf
    • http://cgt-fo-csc.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1607fcbafbf921---34021692231.pdf
    • http://bubblesoflove.net/wp-content/plugins/formcraft/file-upload/server/content/files/160a474cdacc3d---kudazofefoxopavinebi.pdf
    • https://hssipm.com/wp-content/plugins/super-forms/uploads/php/files/749a23a60b19d7e3edac9afe24365323/1296926863.pdf
    • https://rhagro.com.mx/wp-content/plugins/super-forms/uploads/php/files/e2bebdd3f247302f9d29fa3610b230de/45240442213.pdf
    • http://novaserv.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608382e369834---86633493965.pdf
    • https://www.chesapeake-lighting.com/wp-content/plugins/super-forms/uploads/php/files/abe8237aa892939ab6b9efc4b0a0202e/46956913036.pdf
    • http://akademia-jedenastka.pl/zdjecia/fck/file/10915471583.pdf
    • https://gyandeepjkss.org/userfiles/file/tuwoxuj.pdf
    • http://abogarestudio.com/userfiles/file/79322480209.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://scripts.sil.org/OFL

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ff1e.bin
97d32d4a8bf228f710911cf217f468d3d2f576d0e52d3026414dda7b8901dc8c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFF1E 5564 bytes

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