Malicious PDF — malware analysis report

Static analysis result for SHA-256 c5c465a495346264…

MALICIOUS

PDF

61.2 KB Created: 2021-05-05 23:09:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: cd632cf7a45c65c9ab23ed7c8fabaca7 SHA-1: 2231d00169b615e60ea20937a7c523d18f214c5b SHA-256: c5c465a495346264359399b50d411e3ed81cb3faad7f44342e001411a3bb3d78
154 Risk Score

Malware Insights

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

This PDF file was flagged by ClamAV as a phishing trojan and by an ML classifier as malicious. It contains a link farm pointing to multiple compromised WordPress sites, suggesting an attempt to lure users to malicious content. While no scripts were explicitly extracted, the PDF structure and heuristics indicate it's designed to host and distribute links to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8123

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://joepromenshealth.com/wp-content/plugins/super-forms/uploads/php/files/29be4ec5c01dd02171389a0284ba2511/taruxakuvolukix.pdf
    • https://www.ideaklinik.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/16083670ce9f35---lolufakepizuparopusifoxon.pdf
    • http://learningkey.org/userfiles/galubulisa.pdf
    • http://hattrick-sports.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608ddbeabc60a---30848469153.pdf
    • https://cedarcreeksauce.com/wp-content/plugins/super-forms/uploads/php/files/c0732c2385dfc6d8e08396d476e8493c/gegurubunorome.pdf
    • https://fortlauderdale-carservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e0663136bf---78342196737.pdf
    • https://www.lumisolar.pe/wp-content/plugins/formcraft/file-upload/server/content/files/16089e01bc8f7e---64081765968.pdf
    • https://fellowpeo.com/wp-content/plugins/super-forms/uploads/php/files/74c3f186c9ed5c09d46b7e1629420ae0/xudikexu.pdf
    • https://ankaratemizlikcim.com/depo/sayfaresim/file/51761392062.pdf
    • https://engineeredrepinc.com/wp-content/plugins/super-forms/uploads/php/files/995e46ba9ce1257bd7156a5ac324b2f7/jufopakufu.pdf
    • http://xn--clinicaquirogavilario-vbc.com/wp-content/plugins/super-forms/uploads/php/files/6g315brhursbfl1g7vjib3v5r2/poxuwilowonipoxevesoriza.pdf
    • https://www.hungarianassociation.com/wp-content/plugins/formcraft/file-upload/server/content/files/160779ca352ea0---38086318924.pdf
    • https://duext.com/wp-content/plugins/super-forms/uploads/php/files/472f11dd9f48e673b2acb40b2c005416/69024515646.pdf
    • https://suemsas.com/wp-content/plugins/super-forms/uploads/php/files/fjhd82c2vj6o3lc4f1o7rmtk77/xenotibizelasubisedezev.pdf
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a723f5d518---14504426842.pdf
    • https://www.sabiamente.es/wp-content/plugins/formcraft/file-upload/server/content/files/160820f0504044---kizulubajukimekobip.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://feedproxy.google.com/~r/Uplcv/~3/1KS0DP0cxss/uplcv?utm_term=how++beauty+camera
    • http://scripts.sil.org/OFL

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d5f3.bin
394444dbf6b8f5884e7c548683dd16b6903627a81aa8017ffab73c6f227d948c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD5F3 5028 bytes

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