Malicious PDF — malware analysis report

Static analysis result for SHA-256 8d4526555ef8eb06…

MALICIOUS

PDF

63.2 KB Created: 2021-06-13 19:43:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: dbb40d25547e25ecaabda64b6608be18 SHA-1: e847fa07518f3fc8953fe3646a0e05d11b8f0948 SHA-256: 8d4526555ef8eb064d810657ba1fd66cdd704f4e0e9d61dfb920213a5eb466c4
154 Risk Score

Malware Insights

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

This PDF document contains multiple links to external websites, many of which are hosted on compromised WordPress installations or disposable domains. The document's content, though heavily obfuscated, appears to be a lure related to 'emotional intelligence passcode'. The presence of numerous links and the ClamAV detection as 'Pdf.Phishing.Trojan' strongly suggest a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8681

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://philabc.ru/uplcv?utm_term=emotional+intelligence+passcode
    • http://cloverpark1961.com/clients/6/6a/6a73a08bb68f643008adb5efbbb44e43/File/53859748565.pdf
    • https://www.properties-thassos.com/wp-content/plugins/super-forms/uploads/php/files/sr6i2qromak3vmae7r23io8mqs/17067076222.pdf
    • https://3dreamstudios.com/wp-content/plugins/super-forms/uploads/php/files/b158a210c11a16ae8d02768345060930/47481585552.pdf
    • https://suemsas.com/wp-content/plugins/super-forms/uploads/php/files/vsrr5pjvht2c6kpaig8e2v58g5/3371542908.pdf
    • http://drapa-technika.cz/UserFiles/File/pamotimogerodedamum.pdf
    • https://trucraftsmanship.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac5895d0435---vupos.pdf
    • https://marciasmithconsulting.com/wp-content/plugins/super-forms/uploads/php/files/6fc87851133022949b7b74e5b2bc0487/45008797418.pdf
    • http://protech.com.ng/wp-content/plugins/formcraft/file-upload/server/content/files/160a2bc676d5ac---runadezekit.pdf
    • https://wecareu.net/ckfinder/userfiles/files/kozusupe.pdf
    • https://www.landalastadservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d6190aa5c4---8958775822.pdf
    • https://www.helpforbusymums.com/wp-content/plugins/super-forms/uploads/php/files/786adeee1ce494272cb9ed60ee337d6b/dasiwud.pdf
    • https://stopserv.ru/files/file/48228461103.pdf
    • https://nhatngudongkinh.com/upload/ckupload/files/87601317907.pdf
    • http://lilit-realty.com/wp-content/plugins/super-forms/uploads/php/files/ajst62c4sajd8enikrmqvh9pu6/53138535041.pdf
    • http://uat.ideadunes.com/projects/ideadunes-portfolio-site/wp-content/plugins/formcraft/file-upload/server/content/files/1607a1f2799b49---wiwameforozivugitejo.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_off0000e3c4.bin
3c536a79968881c31590bd5d83a3b7e53905a4dc23f71d84b323191c380746a6		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE3C4 5256 bytes

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