Malicious PDF — malware analysis report

Static analysis result for SHA-256 6f1a4e6f0a392eae…

MALICIOUS

PDF

84.5 KB Created: 2021-07-07 13:32:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 49a6ef21879ad8c9cab01c50fa598b8f SHA-1: 0c27b9a5fdb432e5f3459d5b136c0c818036a668 SHA-256: 6f1a4e6f0a392eaec58ace7219fb122aae42f1c4bcdb367e88bac2e084ece253
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains a link farm pointing to numerous compromised websites, as indicated by the 'PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM' and 'PDF_SEO_DISPOSABLE_LINK_FARM' heuristics. ClamAV also detected it as 'Pdf.Phishing.Trojan'. The embedded URLs suggest an attempt to lure users to malicious content, likely as part of a phishing campaign. No scripts were extracted, but the structure strongly implies a phishing or redirection attack.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.3778

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 http://afghansolar.com/userfiles/file/fojuluro.pdf In PDF document text
    • https://k-kompany.ru/wp-content/plugins/super-forms/uploads/php/files/ae31a717e73281da08dcd25a0f6e9023/mikonisijuvozoxufegejal.pdfIn PDF document text
    • http://st03.it/userfiles/files/naforetukigavasujo.pdfIn PDF document text
    • https://organicfertilizerproduction.com/d/files/kelosiviv.pdfIn PDF document text
    • http://sahamit.net/userfiles/file/difiluxivadakabawi.pdfIn PDF document text
    • https://foundryindia.org/userfiles/file/66414283942.pdfIn PDF document text
    • http://ophirtonhotel.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1606d3613c1a85---37031520100.pdfIn PDF document text
    • https://qboardapp.com/wp-content/plugins/super-forms/uploads/php/files/7ede7c7d1ad8cec6dd70dc5737fe31ab/fujunurulefi.pdfIn PDF document text
    • https://bititechnika.com/uploads/file/luzefoti.pdfIn PDF document text
    • http://bioident.pl/photos_fck/file/28575008837.pdfIn PDF document text
    • http://www.stratcareerservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607617cad6b45---pesevilodopi.pdfIn PDF document text
    • http://hungbuloon.com/media/ftp/file/nudiberetizujibirewudebos.pdfIn PDF document text
    • https://webmodels.studio/wp-content/plugins/formcraft/file-upload/server/content/files/160abf7d47a2b9---fidamonejenavajemi.pdfIn PDF document text
    • https://webmodels.studio/wp-content/plugins/formcraft/file-upload/server/content/files/160c52ad994f2e---64120175284.pdfIn PDF document text
    • http://acecaalcoy.com/userfiles/file/50053555099.pdfIn PDF document text
    • http://www.kmclogistics.com/wp-content/plugins/super-forms/uploads/php/files/8943d7340e6cb95e759e3e3260dda524/76120222554.pdfIn PDF document text
    • http://alituncer.com/userfiles/file/57756706999.pdfIn PDF document text
    • https://cedarcreeksauce.com/wp-content/plugins/super-forms/uploads/php/files/ed4110a3f18c9c21832edd45fa7a1528/lovela.pdfIn PDF document text
    • https://corpusbg.com/files/fck/file/93226480119.pdfIn PDF document text
    • https://bdaudit.ro/userfiles/file/logofilopegesewokunosexaz.pdfIn PDF document text
    • http://bobmeetin.com/media/galleries/files/52295651842.pdfIn PDF document text
    • https://flylights.pl/wp-content/plugins/super-forms/uploads/php/files/qqaqr6ri4j7en293a4lnjlvcqu/17925646134.pdfIn PDF document text
    • http://zpb-maciejewski.pl/upload/fck/file/sokojejiwakora.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/fzgW7-mxBc0/uplcv?utm_term=quantitative+research+about+teenage+pregnancy+in+the+philippinesPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f5d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5D9 11132 bytes
SHA-256: aa226d038df1be91b2426198b5587ec279466ccaad467faae1447f207f70fdc3
font_01_sfnt_off00010fb3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10FB3 18340 bytes
SHA-256: 21f272009f001e1e67aff94f8412928ae1b236dc17ed773237cf17cf362de2c9

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