Malicious PDF — malware analysis report

Static analysis result for SHA-256 e0cd9ed75ae2c5ac…

MALICIOUS

PDF

75.4 KB Created: 2021-09-04 21:24:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: ca6111cd0e6693a204269aaddfb0a246 SHA-1: 92f4f68e3f6b158d655663d20095af370b05eb08 SHA-256: e0cd9ed75ae2c5ac6a61bc1184269ed400c3ce34de49f496bed6ce8426839560
154 Risk Score

Malware Insights

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

The PDF document contains numerous external links, many pointing to compromised or disposable hosting domains, indicating a link farm designed to lead users to malicious content. The ClamAV detection and ML classifier strongly suggest a phishing or trojan payload delivery attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7043

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://drafthe.ru/uplcv?utm_term=oral+and+maxillofacial+surgery+mcq+pdf PDF link annotation
    • http://schooldistrictservices.com/clients/f/f6/f6ab1571d2cdf5e569af7b76e288b17c/File/49326086962.pdfIn PDF document text
    • https://amenajarisiconstructii.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1607f8662847b2---xoxevejewil.pdfIn PDF document text
    • https://atl-50.com/files/file/dizikonuxegivatabafoxusa.pdfIn PDF document text
    • http://onellenorzes.com/uploads/files/85525543770.pdfIn PDF document text
    • http://clinicacomciencia.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160ed8793d6a43---46361620038.pdfIn PDF document text
    • http://terapie-psi.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1608944e3568c4---75946782866.pdfIn PDF document text
    • https://www.psalighting.com/wp-content/plugins/super-forms/uploads/php/files/7863aaabee9dfaaf5369af3bdc967d8a/xobenevix.pdfIn PDF document text
    • https://bestcoloringpages.com/userfiles/file/senidedofo.pdfIn PDF document text
    • https://alice-immo.com/userfiles/file/nogubutagiwutumudiluripot.pdfIn PDF document text
    • http://gearonlaw.net/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/95967560575.pdfIn PDF document text
    • https://kaemsp.org/upload/editor/file/58217383197.pdfIn PDF document text
    • https://amartzon.store/wp-content/plugins/super-forms/uploads/php/files/45ce0fdd8ac8d0b140e49ae0c6cc1166/gubaguzisevetamejinamagu.pdfIn PDF document text
    • https://lecourbe.dk/userfiles/file/82159923637.pdfIn PDF document text
    • http://www.sensible-seeds-premium.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f69294e86b---57788973386.pdfIn PDF document text
    • http://x-site.by/upload/editor/files/40978030482.pdfIn PDF document text
    • http://lyzebrno.cz/userfiles/file/tineladojogufewaxafo.pdfIn PDF document text
    • http://primaneighbors.com/userimages/92640607486.pdfIn PDF document text
    • http://enjoy.sk/editor_uploads/system/files/fojufirojifovitobabeb.pdfIn PDF document text
    • http://www.siscard.com/wp-content/plugins/formcraft/file-upload/server/content/files/16090033ea1ab4---67189300088.pdfIn PDF document text
    • http://ambvetesopo.eu/userfiles/files/70530823565.pdfIn PDF document text
    • http://vp-dmsh.ru/admin/ckfinder/userfiles/files/58009362621.pdfIn PDF document text
    • https://alfa-pechati.ru/wp-content/plugins/super-forms/uploads/php/files/a59bf2cb89fe597075742dc281486250/83578394361.pdfIn PDF document text
    • https://intelean.com/wp-content/plugins/formcraft/file-upload/server/content/files/16094caa463c3c---zojifamulatujuw.pdfIn PDF document text
    • https://www.allterra.group/wp-content/plugins/super-forms/uploads/php/files/76e76de41553b78ab5998005994c3910/robat.pdfIn PDF document text
    • http://bimbrlata.cz/UserFiles/File/8275409569.pdfIn PDF document text
    • http://ydtmuhendislik.com/ckfinder/userfiles/files/mogajama.pdfIn PDF document text
    • 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_off0000d883.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD883 18532 bytes
SHA-256: 5776bc0e1ed90cb7c84d8e7760db82cd38971d3b4a8f387eb598b829728edd7e
font_01_sfnt_off00010790.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10790 11352 bytes
SHA-256: fb2af6c8a15cf591a57058519f21b26678994b4e54c3003d81415b97af242d03