Malicious PDF — malware analysis report

Static analysis result for SHA-256 9d2fee04426e2903…

MALICIOUS

PDF

64.0 KB Created: 2021-05-06 20:15:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6bcacfc5503c99adbcfbcf5a203f926d SHA-1: 3947e1fef589433aec901df0183baee5c7ef1143 SHA-256: 9d2fee04426e29037edf968b33f722ccae745b516ebd51fddcabb3cf37e875b2
94 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution T1059.007 JavaScript

The PDF contains a link farm pointing to multiple compromised WordPress sites, likely intended to host malicious payloads or redirect to phishing pages. The ML classifier strongly indicated maliciousness, and the presence of numerous links on disposable hosting further supports a malicious intent. No scripts were extracted, but the structure suggests a downloader or redirector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8377

Heuristics 4

  • 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://cwlighting.com/wp-content/plugins/super-forms/uploads/php/files/54fdf03aca0e086366aec98cd5a86ca8/jonepomelorijujanufebu.pdf
    • http://broadviewlibrary.org/uploaded_bvlib/file/pakutibidepu.pdf
    • http://goref.ru/files/file/pareweletugido.pdf
    • https://deewo.de/wp-content/plugins/formcraft/file-upload/server/content/files/16092f1107c006---vixumujininujukexuwitutaf.pdf
    • http://www.garriagricola.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608e5042921f6---37285045247.pdf
    • http://wypelnienia.kratex.pl/wp-content/plugins/super-forms/uploads/php/files/eb1b42ad033578518f9a5e948e3cfc1d/77136986332.pdf
    • http://moveisgarciadigital.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160781e24dfef5---13417762198.pdf
    • https://wecafephuket.com/wp-content/plugins/super-forms/uploads/php/files/l91hotqtl8n7ujj943drhd0pm4/jugeliwixukivot.pdf
    • http://brodart01.com/wp-content/plugins/super-forms/uploads/php/files/4ti50elfvjvj8gs6lvap5ivddd/soletigokobatajin.pdf
    • https://lasvegasrebath.com/wp-content/plugins/super-forms/uploads/php/files/533873ee6e17783f2ed9bff6c443b958/diranuk.pdf
    • http://ahkjt.com/upfile/file/vupadanavawowapana.pdf
    • https://www.keystonecare.co.uk/wp-content/plugins/super-forms/uploads/php/files/fbcb2ce1b95b602d4c24d34e01c5ba81/4725155361.pdf
    • http://apexhealthnutrition.com/newerac2c/userfiles/file/88207199854.pdf
    • https://www.prowallpanama.com/wp-content/plugins/super-forms/uploads/php/files/43999ce245ff34c9ea43229ddf12ff4f/zobigudobewewuwama.pdf
    • https://marciasmithconsulting.com/wp-content/plugins/super-forms/uploads/php/files/32cd16dfed745dcc22b7e415eb0ebad8/77135138928.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://feedproxy.google.com/~r/skout/mBVl/~3/cv9VXjIrmdE/uplcv?utm_term=train+play+that+song+video
    • http://scripts.sil.org/OFL

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000de7f.bin
f11befdaae975f9c8854f983923a016c4437e35e52249e78c072bafe0e7c336c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDE7F 5120 bytes

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