Malicious PDF — malware analysis report

Static analysis result for SHA-256 c0b4d7277d4cbc26…

MALICIOUS

PDF

62.5 KB Created: 2021-07-06 19:35:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-01
MD5: 019d237effdb1c102c02eed9a3e4f9fd SHA-1: 7742b14591de819ca1548888b41220de0a57293c SHA-256: c0b4d7277d4cbc266d2498dbd39a01d74a2d6d18cb5bb4bf94aeaa4ce9663e88
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm, many hosted on compromised CMS upload directories. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6425

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://pixomot.ru/uplcv?utm_term=meaning+of+gorgeous+in+tamil PDF link annotation
    • https://krassimirtaskov.com/userfiles/files/9435492769.pdfIn PDF document text
    • http://www.movingintofreedom.com/wp-content/plugins/formcraft/file-upload/server/content/files/16083f1ae863ac---58940062505.pdfIn PDF document text
    • http://houstontca.org/Content/uploads/files/74220719431.pdfIn PDF document text
    • https://alenakovalchuk.ru/wp-content/plugins/super-forms/uploads/php/files/f215074666a5bbbcba2fc1a25c352dc1/wemav.pdfIn PDF document text
    • https://samarpanbharat.org/trila/userfiles/file/7219751700.pdfIn PDF document text
    • https://northstarexecutivesearch.com/wp-content/plugins/super-forms/uploads/php/files/b45d445fe5614e6dbf4e8f720e629fc0/46042165872.pdfIn PDF document text
    • http://veronicanealhome.com/wp-content/plugins/formcraft/file-upload/server/content/files/2/160a5d9123134f---durekukawe.pdfIn PDF document text
    • https://hgb.se/filer/file/wofisasixekos.pdfIn PDF document text
    • https://turismo-galicia.es/ckfinder/userfiles/files/rumedafuti.pdfIn PDF document text
    • https://evenimentecastel.ro/wp-content/plugins/super-forms/uploads/php/files/u7rl7b3tsj558tutdo94m6vkjs/76429209401.pdfIn PDF document text
    • https://arizonapoolcontractor.com/wp-content/plugins/formcraft/file-upload/server/content/files/16083efc791925---51027097807.pdfIn PDF document text
    • http://thehawthornnyc.com/wp-content/plugins/formcraft/file-upload/server/content/files/16081813f46d1b---zufusisububalobafisupu.pdfIn PDF document text
    • https://sweetestspaparty.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b217bed4113---moponemuwononefowazefo.pdfIn PDF document text
    • http://transbur.ru/admin/ckfinder/userfiles/files/jileloj.pdfIn PDF document text
    • http://driver-jazda.pl/upload/file/13170335414.pdfIn PDF document text
    • http://www.itbaloch.com/wp-content/plugins/formcraft/file-upload/server/content/files/160abed409951f---59073134657.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609acc148da6a---41153547397.pdfIn PDF document text
    • http://bjeclinic.com/ckfinder/userfiles/files/87799132554.pdfIn PDF document text
    • https://www.chauffeur-prive-nice.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1606c7bb1e468e---wofador.pdfIn PDF document text
    • https://www.superioreagle.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c15950c86bb---xawumadobewupu.pdfIn PDF document text
    • http://agcslohian.com/userfiles/file/nopaxipejogejivar.pdfIn PDF document text
    • https://www.infratechgroep.nl/wp-content/plugins/super-forms/uploads/php/files/8d2b7f1a090b6552193274dbbb6d65ad/tanajugi.pdfIn PDF document text
    • http://www.franklinwebdesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/160842f2fc058c---94910022504.pdfIn PDF document text
    • https://pima-alarms.rs/slicice/file/60239533287.pdfIn PDF document text
    • http://sewakendragroup.com/userfiles/file/lugorusudobavogawabep.pdfIn PDF document text
    • http://esoftland.com/userfiles/file/66381434623.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_off0000b8ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB8EF 16668 bytes
SHA-256: 30fa312bd4a2b0c358e140acd693eb564712ca68548e7009b06475bb7c0b39f4
font_01_sfnt_off0000e3fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3FB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1