Malicious PDF — malware analysis report

Static analysis result for SHA-256 ec95bc940b9e0319…

MALICIOUS

PDF

62.5 KB Created: 2021-08-24 23:53:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: f7c6c784d3c6a41884191a0d03c74767 SHA-1: cc2f5912946a7e2544b547839d560b9b305025dc SHA-256: ec95bc940b9e0319023995e103d660226ccf10bb4b5a8cf6b2661ad002afd9cf
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF was identified as malicious by ML classifiers and ClamAV, flagging it as a phishing trojan. It functions as a link farm, containing numerous URLs pointing to compromised WordPress sites, which are likely used to host malicious content or redirect users to phishing pages. The presence of multiple links on disposable or compromised hosting reinforces its role as a distribution vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6029

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://mygamedaysports.com/wp-content/plugins/super-forms/uploads/php/files/6c6f5bc68d6e24ba465d0b600d740c39/50711259011.pdf In PDF document text
    • https://local-atlas.ru/userfiles/files/sibumobipoxowe.pdfIn PDF document text
    • http://www.kliningstroy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160e70584e9ce0---48721153709.pdfIn PDF document text
    • http://esenkardeslerinsaat.com/resimlerfiles/juverugezatonutaxiw.pdfIn PDF document text
    • http://merwepizza.com/upload/file/purefakezim.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1611beef15a9e3---gikesunerosip.pdfIn PDF document text
    • http://cementfeet.com/userfiles/file/90228275931.pdfIn PDF document text
    • http://gchsclassof1970reunion.com/clients/6/6a/6a45fbe13d63dbb0eb8070d7cb9dbc89/File/70636405039.pdfIn PDF document text
    • http://xn--42cfa4ewb0a0b3fwh.com/imageupload/files/navovozefaxifosagotaxubam.pdfIn PDF document text
    • https://carthink.org/wp-content/plugins/formcraft/file-upload/server/content/files/160f72278a51d7---13886465947.pdfIn PDF document text
    • http://aisef.org/uploads/userfiles/file/file/duvonolisopogi.pdfIn PDF document text
    • http://tetraeng.it/userfiles/files/36166971569.pdfIn PDF document text
    • http://korvet-sp.ru/userfiles/file/zejuropexojazukuburuwofoj.pdfIn PDF document text
    • https://outsourcedbackoffice.co.uk/wp-content/plugins/super-forms/uploads/php/files/932d600673dd50153c999849d355caaa/58790779044.pdfIn PDF document text
    • https://mithermomix.com.mx/wp-content/plugins/super-forms/uploads/php/files/4bd0e4bf831912a2084dc800984c9d77/wikatexitubilugajagupu.pdfIn PDF document text
    • https://fitnessrev.net/wp-content/plugins/super-forms/uploads/php/files/9bq37p4e9d3tl8ed3h298a3lls/15516603621.pdfIn PDF document text
    • http://dpholding.ru/uploads/files/62603100325.pdfIn PDF document text
    • http://ferrogep99.hu/static/media/file/vinukovaxulawaf.pdfIn PDF document text
    • http://caacoding.net/wp-content/plugins/formcraft/file-upload/server/content/files/160848b6462b1b---90583499317.pdfIn PDF document text
    • https://strategieb2b.com/userfiles/file/gulopukuvegulomogaval.pdfIn PDF document text
    • http://hatowo.com/app/webroot/uploads/files/67208665411.pdfIn PDF document text
    • https://nnt52.ru/userfiles/file/zegelimomusag.pdfIn PDF document text
    • https://sofupingame.com/calisma2/files/uploads/45729458042.pdfIn PDF document text
    • https://anna-bel.com/app/webroot/files/userfiles/files/39206423464.pdfIn PDF document text
    • https://humicdp.com/uploads/2021-06-30/images/files/xomanurodebodazadu.pdfIn PDF document text
    • https://pavaniautismschools.com/wp-content/plugins/super-forms/uploads/php/files/u0ev7ekremdkg53ov3rmpoorii/77482155964.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BvfzZFkJO3s/uplcv?utm_term=blunt+force+trauma+to+knee+capPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e32d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE32D 10628 bytes
SHA-256: 21324954bbe16ca1508ca3fbb40bbeee647cd56807db98b35938fd76deaebd43

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