Malicious PDF — malware analysis report

Static analysis result for SHA-256 9e0d6e77f5c2c434…

MALICIOUS

PDF

65.1 KB Created: 2021-08-02 06:45:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 0c581917522645b0b57972e072cb7abb SHA-1: 84177627762a639d4590d65c03c6a476c4d1c565 SHA-256: 9e0d6e77f5c2c4348ef87681c8d7ef106fb4450a3b90d54ca8357b71bfeed756
162 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external links, many of which point to compromised CMS uploads or disposable hosting, indicating a malicious intent to redirect users. The ML classifier and ClamAV detection strongly support this assessment. The embedded JavaScript likely facilitates the redirection or further payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8707

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://laulumaja.fi/ckfinder/userfiles/files/wafiz.pdf In PDF document text
    • http://vinmexindia.com/uploads/67575344175.pdfIn PDF document text
    • http://dianacb.cz/userfiles/file/majagitotesuvi.pdfIn PDF document text
    • https://www.plsok.com/wp-content/plugins/super-forms/uploads/php/files/4ffbe961b9dfee4985ef7827d7936017/89729871459.pdfIn PDF document text
    • http://sns.hu/_user/file/jujulefudiluxeg.pdfIn PDF document text
    • http://makaeximworld.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a22ec5a41ab---85045171155.pdfIn PDF document text
    • http://energo-winstal.pl/userfiles/file/3173722797.pdfIn PDF document text
    • https://www.grandeprairie.org/wp-content/plugins/formcraft/file-upload/server/content/files/1609444636f6e9---xodenadigu.pdfIn PDF document text
    • http://www.advokat.com/app/webroot/img/fck/file/44122132819.pdfIn PDF document text
    • https://www.physioaktivkramer.de/wp-content/plugins/formcraft/file-upload/server/content/files/160c167f6ee724---ponufobenidafadakogo.pdfIn PDF document text
    • https://apparel.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/7f1ffba5f771e93996aa1b7cbd67a911/takifalujopofuro.pdfIn PDF document text
    • https://dcoderesearch.com/uploads/90301096876.pdfIn PDF document text
    • http://misterholidaysanprisco.it/userfiles/files/17925897558.pdfIn PDF document text
    • http://www.drop-lok.com/wp-content/plugins/formcraft/file-upload/server/content/files/160837abc21872---filokojamezobuxotapajuro.pdfIn PDF document text
    • https://drrajanmahtani.com/userfiles/files/telapelop.pdfIn PDF document text
    • http://voszveszprem.hu/_user/file/naboku.pdfIn PDF document text
    • http://plusbateria.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ad075b5ed9b---regejogufelepajoku.pdfIn PDF document text
    • http://www.guaitoli.eng.br/wp-content/plugins/formcraft/file-upload/server/content/files/1606e991b406d1---rubifurodewapujisur.pdfIn PDF document text
    • https://www.golaw.net/wp-content/plugins/formcraft/file-upload/server/content/files/160c7163ac63d5---40287812219.pdfIn PDF document text
    • http://chagatea.ru/wp-content/plugins/super-forms/uploads/php/files/1cdb2f01de858c7ab017745451951556/meruradizekopopewulakisov.pdfIn PDF document text
    • http://alnoorcity.com/userfiles/file/75357027164.pdfIn PDF document text
    • https://www.reparaciondebomba.com.ar/wp-content/plugins/super-forms/uploads/php/files/lnkmcslpj5vakm08g9vl3o7f54/92436163929.pdfIn PDF document text
    • http://erbilsunhotel.com/wp-content/plugins/super-forms/uploads/php/files/hjk5v5bt7b73gqluui6cl7uoj4/32190949587.pdfIn PDF document text
    • http://mackyz7automotive.com/js/upload/files/vubapojolozedu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/YTWXjIUwRh0/uplcv?utm_term=why+changes+are+important+in+lifePDF link annotation

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