Malicious PDF — malware analysis report

Static analysis result for SHA-256 e4b4f61b5bfb720b…

MALICIOUS

PDF

62.3 KB Created: 2021-07-31 07:05:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 92ed724a9cbad8f7117d86598bcfb7cd SHA-1: 8a6b20e1fc5cf85786621817ef2efbc03851a8a1 SHA-256: e4b4f61b5bfb720b62c8c131b2d0b3ae277e69b326fdec83db89ed6f58ff5a67
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous links pointing to compromised CMS upload directories and disposable hosting domains, indicative of a link farm used for phishing or malware distribution. The ClamAV detection and ML classifier further support its malicious nature. The file's structure and embedded URLs suggest it's designed to lure users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6040

Heuristics 5

  • 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.
  • 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=cu%C3%A1nto+dinero+necesito+para+poner+una+panader%C3%ADa PDF link annotation
    • http://cgpreceptor.com/ckfinder/userfiles/files/rekibadoxa.pdfIn PDF document text
    • http://pphu-joanna.pl/fckpliki/file/48433712538.pdfIn PDF document text
    • https://tl-systems.hu/files/files/bevewatofidawexisevanova.pdfIn PDF document text
    • https://digireg.se/upload/semedavipunewevokezege.pdfIn PDF document text
    • http://insidethedigitaltrend.biz/userfiles/file/zasomepupek.pdfIn PDF document text
    • https://www.justgym.co.za/wp-content/plugins/super-forms/uploads/php/files/2oc709ha5ekb3u76rjhm11371k/48063715090.pdfIn PDF document text
    • https://nobleanimalsanctuary.org/wp-content/plugins/super-forms/uploads/php/files/tmp/46320526532.pdfIn PDF document text
    • https://www.zulilighting.com/wp-content/plugins/super-forms/uploads/php/files/734d6e50d53a49088e85729cf4a114c4/luregigemufevozedorudek.pdfIn PDF document text
    • https://at2-turbo-j3t.com/contents//files/demod.pdfIn PDF document text
    • https://calldidocta.com/wp-content/plugins/super-forms/uploads/php/files/c8bfe3bb6b598405a6e298a06b77df0d/zewetojuxazitinev.pdfIn PDF document text
    • http://hasyo.net/files/file/1586280798.pdfIn PDF document text
    • http://kingsfinancialconsulting.com/userfiles/file/ladoduzanadofofixid.pdfIn PDF document text
    • http://hasyo.net/files/file/80525334070.pdfIn PDF document text
    • http://www.viksexteriors.com/wp-content/plugins/formcraft/file-upload/server/content/files/16087c7e529753---mixoravaru.pdfIn PDF document text
    • https://na-nule.ru/wp-content/plugins/super-forms/uploads/php/files/3dgfi3arn5q43hh1fbnoq3hmm5/53646269563.pdfIn PDF document text
    • https://www.davinci.dk/wp-content/plugins/formcraft/file-upload/server/content/files/160ada3cdaf86b---32475582055.pdfIn PDF document text
    • http://brooklinehs1964.com/clients/6/6a/6a3559cec3eb17f551da2d864c8c85ab/File/wuwalolakomojudo.pdfIn PDF document text
    • https://laneopx.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aec0acae1ba---mizafawigafutilujug.pdfIn PDF document text
    • https://farmstead.tw/farmstead/upload/files/wewapukakofezerol.pdfIn PDF document text
    • https://betentour.com/sites/default/files/file/tezubavivazonejika.pdfIn PDF document text
    • https://cbolean.com/wp-content/plugins/super-forms/uploads/php/files/cjfufqplvsdovvlh0ikh7atgm7/babevozex.pdfIn PDF document text
    • http://mouaumfb.com/wp-content/plugins/formcraft/file-upload/server/content/files/16096ae21db7af---mazokeloxuwabiti.pdfIn PDF document text
    • https://sunnyvale.com/wysiwygfiles/file/86237845186.pdfIn PDF document text
    • http://tovicetour.com/FileData/ckfinder/files/20210617_03F3CC2CC33AB876.pdfIn PDF document text

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