Malicious PDF — malware analysis report

Static analysis result for SHA-256 60f6df2d5fd5ce7d…

MALICIOUS

PDF

96.0 KB Created: 2021-07-04 07:53:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 1fb96461f32a300b2716c5bc224eb9a0 SHA-1: 63668a7d3dd1b1897e150d5c0d7fc7b5ce404ece SHA-256: 60f6df2d5fd5ce7dc8a317c00ba9819a42b6032ecf67dd22e305f19166f2a09f
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The sample is identified as malicious by ClamAV and exhibits characteristics of a link farm, directing users to multiple compromised WordPress sites. The PDF document contains numerous embedded URLs, many of which point to potentially malicious content or phishing lures. The primary attack pattern involves directing users to external, compromised websites, likely for further exploitation or credential harvesting.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.3878

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://crewmak.ru/uplcv?utm_term=scout+finch+quotes+that+describe+her+with+page+numbers PDF link annotation
    • https://too.kg/wp-content/plugins/super-forms/uploads/php/files/ff6470d8dc99590d4a2855a4e000bea0/tobodejo.pdfIn PDF document text
    • https://tamtam.com.ua/wp-content/plugins/super-forms/uploads/php/files/7b416764e6959f4c37d169bf4437262e/kibivabojadakaxaluwumuk.pdfIn PDF document text
    • http://uniquestatues.com/clients/9/91/91c6e204ee4529d3b478b0717040545d/File/suzut.pdfIn PDF document text
    • https://www.ciabrini-immobilier.com/wp-content/plugins/super-forms/uploads/php/files/rbsgfvhaub0avlo7nm79jk9hgo/losasuxazuvumerenube.pdfIn PDF document text
    • http://www.auditsi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160775075d532b---72578443259.pdfIn PDF document text
    • http://www.nbrownies.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16094217fea9d5---60558828753.pdfIn PDF document text
    • https://travels-ukraine.com/wp-content/plugins/formcraft/file-upload/server/content/files/160af902a2ac3f---66887956311.pdfIn PDF document text
    • http://www.marcado.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160bd332fe75d2---35932614237.pdfIn PDF document text
    • https://gulfsupremesa.com/ckfinder/userfiles/files/77653616472.pdfIn PDF document text
    • https://velvetskin.pl/wp-content/plugins/super-forms/uploads/php/files/6e13fbc88cd930b9176a258e6a73f3a8/namizixoxav.pdfIn PDF document text
    • https://groupunsur4.com/contents//files/misexokugaxaxan.pdfIn PDF document text
    • https://www.perfumista.co.uk/wp-content/plugins/super-forms/uploads/php/files/98362c95d481d3f4f8e0ae3c87cf1601/rurenunoxelis.pdfIn PDF document text
    • http://artmetinc.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a091cb7b3c3---91535019801.pdfIn PDF document text
    • https://urbanplace.me/wp-content/plugins/super-forms/uploads/php/files/e4ade758b6ca322e9a3c0c3a847c42c8/31758493607.pdfIn PDF document text
    • https://footballsod.com/images/ck-uploads/files/21860984156.pdfIn PDF document text
    • https://yourtuscanyguide.com/wp-content/plugins/super-forms/uploads/php/files/se1l1u9vaae6uc4s2eovhlop43/97990169557.pdfIn PDF document text
    • http://www.advokat.com/app/webroot/img/fck/file/xuvaluvixobegubutijuvis.pdfIn PDF document text
    • http://frederickfollows.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1607254f07b4d6---41293915282.pdfIn PDF document text
    • http://victorylimo1.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606ca54bddb0f---73434317349.pdfIn PDF document text
    • https://www.napariverinn.com/wp-content/plugins/super-forms/uploads/php/files/7e63111845923fff56535d9ac71a7e51/36726453339.pdfIn PDF document text
    • http://teknis.it/userfiles/files/neradatowuvekov.pdfIn PDF document text
    • http://irmascaritasdejesus.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/16089a0a2d7df8---sedumexododegokedisubuxuv.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_off000137f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x137F2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00015009.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15009 11568 bytes
SHA-256: 9a803b14e5dea7a5db3e0a64481ea2eeb1e1b7cd377ef90baf6ac87e8bbb7ced