Malicious PDF — malware analysis report

Static analysis result for SHA-256 26cee9d50821ec7c…

MALICIOUS

PDF

61.5 KB Created: 2021-05-06 23:59:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c8b156b48525ffd76ebb7489bc8f744a SHA-1: 5e11c00cfd1259258ed872ea807bf38697389eb2 SHA-256: 26cee9d50821ec7cf8aa48f58d47731079f149ecd59f790c290da27cf0a92da1
154 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. The document contains numerous embedded links pointing to various websites, many of which appear to be compromised WordPress installations used for hosting malicious files. The primary attack pattern involves directing users to these external sites, likely to deliver further malware or harvest credentials.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7927

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://inwebjor.ru/uplcv?utm_term=betiya+kyu+parai+hai+song+free
    • http://www.hkwebdesign.com.hk/wp-content/plugins/formcraft/file-upload/server/content/files/16088b8f3f1b16---bilazimafitaz.pdf
    • http://www.investing-in-women.com/wp-content/plugins/formcraft/file-upload/server/content/files/16077609b94267---fugunowag.pdf
    • https://www.hontoys.com.au/wp-content/plugins/super-forms/uploads/php/files/6hr3v8ink1rrl5crcc3oguts6j/38337126232.pdf
    • http://www.191seo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608ec06342a5a---fomalupamuxaz.pdf
    • https://alice-immo.com/userfiles/file/pupujogulotenulajiseketi.pdf
    • https://ncfouting.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608aeed97cc62---68972928146.pdf
    • https://coachtourbusrental.com/wp-content/plugins/formcraft/file-upload/server/content/files/16081d2c19e441---48253910095.pdf
    • http://alnoorcity.com/userfiles/file/79101830359.pdf
    • http://ganan10.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/160823d6408404---nanijulevoxukago.pdf
    • https://www.schroedersales.com/wp-content/plugins/super-forms/uploads/php/files/7580b10ea62076cda5ee5945d39ef970/kuwudufelimam.pdf
    • https://www.hospedeagora.com.br/wp-content/plugins/super-forms/uploads/php/files/03urf18lslfjhk6jld89eb0ceq/58938932841.pdf
    • https://kogan-photo.ru/wp-content/plugins/super-forms/uploads/php/files/5833b91cda05c7290771c7f2a28ba64e/vowiwurisipakediloropi.pdf
    • https://arizonapoolcontractor.com/wp-content/plugins/formcraft/file-upload/server/content/files/16092e51b93091---49222389219.pdf
    • http://ljhalls.com/wp-content/plugins/super-forms/uploads/php/files/b147d3f60ce05eee2794dda8192a12de/33203213783.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_off0000ce63.bin
d3578dd0920ff3f36477d6dc1227d459b0a0e363b3290e67cdfdf67e81212c72		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCE63 5344 bytes

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