Malicious PDF — malware analysis report

Static analysis result for SHA-256 61e7f7aad7247b26…

MALICIOUS

PDF

64.0 KB Created: 2021-06-24 15:22:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 119723b1250bd8f3ae90fc4e0be67435 SHA-1: 0c88092939ad9a3c0bf3c059ab664c24c909677e SHA-256: 61e7f7aad7247b26ff798983da69b33d4b9f60ef790b360c3aacac20e9a8b6a6
154 Risk Score

Malware Insights

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

This PDF document was flagged by multiple heuristics, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. The document contains a link farm pointing to numerous compromised WordPress sites, suggesting an attempt to distribute malicious content or conduct phishing. Although no scripts were explicitly extracted, the PDF structure and link farm indicate a malicious intent to redirect users to potentially harmful URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8600

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://redwoodpwr.com/wp-content/plugins/super-forms/uploads/php/files/qgktc0m82lcgucbpkd671uv355/44713535245.pdf
    • http://fobosgrunt.ru/files/ckfinder/files/26397587549.pdf
    • https://winston-woodward.com/wp-content/plugins/super-forms/uploads/php/files/c82ae5eceb0055bf7f908d07fcb2897e/80185481523.pdf
    • http://gintaras.cz/userfiles/file/37627141781.pdf
    • http://cablexconsulting.com/Upload/file/tisojedamol.pdf
    • http://www.aluvascientific.com/UserFiles/file/26794396763.pdf
    • https://www.caesarstravel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ab8d38c3796---94692661206.pdf
    • https://www.lamuccacompany.com/wp-content/plugins/super-forms/uploads/php/files/8ccfeb67c2d50e2d66202a57b32bd03a/bafapakipu.pdf
    • http://brianhaymore.com/images/e/file/nosekimato.pdf
    • http://playfromhome.org/clients/4/49/49939bf6a151252ba1adfe53d1befa29/File/44816178685.pdf
    • http://rufullthrottle.com/wp-content/plugins/formcraft/file-upload/server/content/files/16079f1d842102---finib.pdf
    • https://islandsvefir.is/wp-content/plugins/super-forms/uploads/php/files/p8vugq9fp7kk5b60dhaungdl9q/toparagejoluxagob.pdf
    • https://wcdt.co.th/wp-content/plugins/super-forms/uploads/php/files/2ljc7qv2klrsiaqfpmlprq61rg/20619056083.pdf
    • http://ever0036.com/assets/uploads/ckedit/files/20210529163018.pdf
    • https://www.ayersworthglen.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aa40bb9e58c---27493107938.pdf
    • https://jiptv.nl/wp-content/plugins/super-forms/uploads/php/files/gns1djv890nuvb29vde3k0e1dm/bugurix.pdf
    • https://www.hadlowsecurityshutters.com/wp-content/plugins/super-forms/uploads/php/files/5bd6ebf6e26a83461f97284706dda892/fuguzusu.pdf
    • http://www.supercarrentalsofmiami.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c6c3cc62263---22672352052.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/A3Ryygt5BCM/uplcv?utm_term=patrones+para+hacer+manualidades+en+foami
    • http://scripts.sil.org/OFL

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d88d.bin
dbcf8a23f7151954158a938b35cd758be008d7b2e22d9486d7af573799e06e60		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD88D 5396 bytes

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