Malicious PDF — malware analysis report

Static analysis result for SHA-256 c2b48ce044952a60…

MALICIOUS

PDF

55.9 KB Created: 2021-06-16 03:45:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e41ce9f0937ec46514c7ef15bd4c330b SHA-1: 7761855a5df885f9fa36ef62666a85fb0889f45e SHA-256: c2b48ce044952a603127d60719025015fda70db16fcea677cca96367d268c6cc
154 Risk Score

Malware Insights

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

This PDF document contains numerous links, many pointing to compromised CMS upload directories, suggesting a link farm designed to distribute malicious content. The presence of a URL with a 'watch online' query parameter indicates a lure for potentially malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9920

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 https://medvor.ru/uplcv?utm_term=neram+movie+watch+online+with+english+subtitles
    • http://www.canadavisaservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/160802e7fc589c---femajuwizininixugizusa.pdf
    • https://vidolamerica.org/wp-content/plugins/super-forms/uploads/php/files/fed2ef27fd6e2616b2dcf83cba9396bc/22231479653.pdf
    • https://aldurra.ly/images-editeur/img/file/wusodi.pdf
    • https://www.mii.net/wp-content/plugins/super-forms/uploads/php/files/328e415c7178272bac03bba9d59c541f/tepoxufogimuzulipoger.pdf
    • http://srihemkuntschoolint.com/slbdavbatala/userfiles/file/42682680491.pdf
    • https://zweiund40.com/wp-content/plugins/super-forms/uploads/php/files/pbogqg4u1srr0fm9o73iir7tsh/muvor.pdf
    • http://hattrick-sports.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ad9a1a6a34---2910311679.pdf
    • https://www.golaw.net/wp-content/plugins/formcraft/file-upload/server/content/files/160a14d27615d0---76860207219.pdf
    • http://szpk.hu/_user/file/88292816716.pdf
    • http://www.shipsupply.co.mz/wp-content/plugins/formcraft/file-upload/server/content/files/160a0d8bcd3770---54901150517.pdf
    • https://loctra.net/userfiles/file/gutijatefigower.pdf
    • https://georgiamusicpartners.org/wp-content/plugins/super-forms/uploads/php/files/05c9b9e43b3f7ab644b57d84c15c184c/sotuxurolesisumeverukizo.pdf
    • https://pfgmm.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160beece12b6f6---23570693304.pdf
    • http://nhs1980alumni.com/clients/878257/File/dejijivadogumeses.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://scripts.sil.org/OFL

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cfba.bin
76023a25e5e35960a60bc1c0175fcfd2a9a28dc0ad8bac8bfefa82edecf2f06d		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCFBA 5472 bytes

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