Malicious PDF — malware analysis report

Static analysis result for SHA-256 6736c2fda7909420…

MALICIOUS

PDF

62.6 KB Created: 2021-05-16 01:41:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9b88006ff59d0187eca4e52ae66b70a9 SHA-1: 09bd595adbc06695bfa21ddd31096319af26decb SHA-256: 6736c2fda7909420ca65008256373f76cfedd2540978285ec6b15491b6e12221
154 Risk Score

Malware Insights

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

This PDF document is classified as malicious by ML models and ClamAV, indicating it's a phishing or trojan delivery mechanism. It functions as a link farm, directing users to multiple compromised WordPress sites, likely to host further malicious content or phishing pages. The embedded URLs and the PDF_SEO_DISPOSABLE_LINK_FARM heuristic strongly suggest a phishing or scam attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8119

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 http://www.dramayaramendes.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160762a5ac66d6---jiranawaz.pdf
    • http://www.cenlajobinator.com/siteuploads/editorimg/file/tusuxuvazuzofesom.pdf
    • http://amtusa.com/wp-content/plugins/formcraft/file-upload/server/content/files/16096a48114aa6---49941847097.pdf
    • https://interesttour.com/wp-content/plugins/super-forms/uploads/php/files/381f0a76585807c324419b4438955765/voxipovuputamaxur.pdf
    • https://caravanandre.it/wp-content/plugins/super-forms/uploads/php/files/09c202f62e67d86a0827dd2f7ea16d65/48429674059.pdf
    • http://www.louthadventures.ie/wp-content/plugins/formcraft/file-upload/server/content/files/16070685c27c37---norofotoku.pdf
    • https://metroguards.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1606d5bb4b0d45---68449414907.pdf
    • http://www.gunyagder.org.tr/wp-content/plugins/super-forms/uploads/php/files/5djnjrip4kak6f3fvlgrujvr70/64777676258.pdf
    • https://cwlighting.com/wp-content/plugins/super-forms/uploads/php/files/07577a72720f1c8a76b42c1a05e65302/ridagapunotiwujusorabeseb.pdf
    • https://premiumvipbusiness.com/wp-content/plugins/super-forms/uploads/php/files/c02420a6f849a21c1b6c44979192ffa0/jojedajizizasirukinuxasum.pdf
    • https://mamproducciones.es/wp-content/plugins/formcraft/file-upload/server/content/files/1608068856a4ff---vazurutijutatibipodeka.pdf
    • http://bajcsidavidfoto.com/_user/file/57168456296.pdf
    • https://divorcioconsensual.com.br/wp-content/plugins/super-forms/uploads/php/files/f5dd6c3dfec794f686c0c61edee83854/70900416285.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1xuhb7AK25c/uplcv?utm_term=camouflaging+animals+information
    • http://scripts.sil.org/OFL

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000da76.bin
b040afbcd18adc49ab997e8d1d252050d69cae41b9d2ad6afd558defc6676f45		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDA76 4992 bytes

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