Malicious PDF — malware analysis report

Static analysis result for SHA-256 9569f93979d0d804…

MALICIOUS

PDF

69.3 KB Created: 2021-09-06 18:38:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 251f7682b6e0094a1eb0f53284b66e4a SHA-1: 0e258ec909a0230333585e80aabf426e591bfef0 SHA-256: 9569f93979d0d804245c730dfd92a6208aae615977fa3f1d68076d0fd8c7adcb
132 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as a malicious PDF by ClamAV, specifically as 'Pdf.Phishing.Trojan'. Static analysis revealed embedded JavaScript and a large number of external links, many pointing to potentially compromised or disposable hosting. The presence of embedded JavaScript (T1059.007) suggests an attempt to execute malicious code within the PDF viewer, likely to facilitate further compromise or phishing. The numerous external links, including one hosted on a compromised CMS upload directory, indicate a phishing or redirection scheme, aligning with the 'Spearphishing Attachment' (T1566.001) initial access vector.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.4816

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 https://seerupit.dk/assens/file/4186156741.pdf In PDF document text
    • https://implant-drill.com/userfiles/file/77031491294.pdfIn PDF document text
    • http://uticahighclassof78.com/clients/8/89/89c70e22fe5ad1405280b455f64975d7/File/tolezipunil.pdfIn PDF document text
    • http://vipavtoufa.ru/wp-content/plugins/super-forms/uploads/php/files/d30d40c95f083086abc0e9861f5ec70e/68141712314.pdfIn PDF document text
    • https://sindonis.com/userfiles/file/sidew.pdfIn PDF document text
    • http://chinazzjx.com/d/files/nibuxe.pdfIn PDF document text
    • http://stmrcstvm.com/userfiles/file/zovemunimigevurarevo.pdfIn PDF document text
    • https://doublehaircenter.com/upload/ckfinder/files/babokejirupe.pdfIn PDF document text
    • https://foulardfotografando.it/file/40209216264.pdfIn PDF document text
    • http://xoblates.com/clients/e/e0/e08cfb93fb97b00c28394d0532709dc9/File/pesir.pdfIn PDF document text
    • http://skkl.cn/filespath/files/20210826144504.pdfIn PDF document text
    • https://youstore21.com/wp-content/plugins/super-forms/uploads/php/files/d758a0e05b82576c306819f2816573f2/74645024621.pdfIn PDF document text
    • http://hamyarsanatco.com/ckfinder/userfiles/files/960464433.pdfIn PDF document text
    • http://open.ua/uploads/ckeditor/files/89598405739.pdfIn PDF document text
    • http://smartcookieacademy.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e136068ff6---xujojamo.pdfIn PDF document text
    • http://mkngsp.ru/upload/files/5333030218.pdfIn PDF document text
    • https://perleyparish.org/wp-content/plugins/super-forms/uploads/php/files/8f90fa21b5ee2a0f5ca21f361243ff2a/panananekivivu.pdfIn PDF document text
    • https://digitaldaya.com/imagenes/file/rufajisozibejakasune.pdfIn PDF document text
    • http://prefinancovaniehypoteky.sk/res/file/95454201000.pdfIn PDF document text
    • https://www.areatransfers.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bd756aa330d---xuzotunimijek.pdfIn PDF document text
    • http://alexanderkanevskyartistbiography.com/clientMedia/file/pagol.pdfIn PDF document text
    • http://www.ernakulamarchdiocese.org/www/js/ckfinder/userfiles/files/zusepagul.pdfIn PDF document text
    • http://www.socalgreatwhite.com/wp-content/plugins/formcraft/file-upload/server/content/files/16076cb7fa48ec---67245221882.pdfIn PDF document text
    • https://pmcp-avac.com/files/upload-ckfinder/files/18978262958.pdfIn PDF document text
    • http://for-rent-aalst.com/wp-content/plugins/formcraft/file-upload/server/content/files/16074947e76afe---januzatojigazobomojuf.pdfIn PDF document text
    • http://millionsdiscount.com/mo_images/files/67767636648.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/LPIa9PGmDLg/uplcv?utm_term=community+empowerment+pdfPDF link annotation

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