Malicious PDF — malware analysis report

Static analysis result for SHA-256 c0e223e860270f7d…

MALICIOUS

PDF

65.1 KB Created: 2021-09-08 00:05:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 212c68cc89500f793448dbf61a84c61a SHA-1: 90d494bd22da6d460982385b71efe6a0d123e7a0 SHA-256: c0e223e860270f7d2bbaf5cf006023a45b339515ab214ace57f867afcf7ced3f
94 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links pointing to compromised WordPress sites and other domains, suggesting it's designed to redirect users to malicious content. The 'PDF_SEO_DISPOSABLE_LINK_FARM' and 'PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM' heuristics indicate a deliberate effort to create a link farm on potentially untrustworthy hosting. While no scripts were explicitly extracted, the ML classifier and link farm heuristics strongly suggest malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6902

Heuristics 4

  • 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://oniceh.ru/uplcv?utm_term=flip+flop+logic+gate+pdf PDF link annotation
    • https://mymango.ru/wp-content/plugins/super-forms/uploads/php/files/37186c02e643c31e758a0e4c19a3744e/77938798372.pdfIn PDF document text
    • http://allycatering.com/userfiles/punevunijinipulatufoxo.pdfIn PDF document text
    • https://www.frankcapassoandsons.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bb7cee347ee---70457252751.pdfIn PDF document text
    • https://x-software.cz/data/file/xepuwa.pdfIn PDF document text
    • http://www.bestlifepolicy.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160916f822487a---59412235016.pdfIn PDF document text
    • https://yourtuscanyguide.com/wp-content/plugins/super-forms/uploads/php/files/9utk7702j1d3k0nglm0lhft4e7/kewuzorutuzujoxim.pdfIn PDF document text
    • http://vijyaiprismcrm.com/userfiles/files/xoxiwagokuvovagiw.pdfIn PDF document text
    • http://wawabed.pl/uploads/userfiles/file/wajiduviboziruwun.pdfIn PDF document text
    • https://www.hotel-palladium.gr/wp-content/plugins/super-forms/uploads/php/files/gnp6djsar2p88f8ei5q2dks0e3/7755315750.pdfIn PDF document text
    • https://vinaconexmec.vn/uploads/news_file/sokutawunuruzebe.pdfIn PDF document text
    • https://nmg.lv/img/uploads/files/86423874916.pdfIn PDF document text
    • https://cottingham-group.com/cufiles/files/29922973332.pdfIn PDF document text
    • http://www.birapart.com/wp-content/plugins/formcraft/file-upload/server/content/files/160716f7833ec6---88245860429.pdfIn PDF document text
    • https://designcoordinators.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e4bb267e80---12919246371.pdfIn PDF document text
    • https://amartzon.store/wp-content/plugins/super-forms/uploads/php/files/ffbee01a1db4ca45a417eaf78a9e7d72/vofugeso.pdfIn PDF document text
    • https://kop-trans.pl/uploads/userfiles/files/2944617300.pdfIn PDF document text
    • https://ccveg.org/wp-content/plugins/super-forms/uploads/php/files/jjf95tbugjj0mo029qeugss5o4/nujabesi.pdfIn PDF document text
    • https://bustotoronto.com/userfiles/file/97130821883.pdfIn PDF document text
    • http://esthebel.de/userfiles/file/niwazejifisupiruxezaz.pdfIn PDF document text
    • https://drahmetbostanci.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609544acc63d5---zolexafarufedixotuwatodem.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/16087550eaef80---63087224988.pdfIn PDF document text
    • https://balticstroy.com/uploads/files/tapobewafafugifowunegif.pdfIn PDF document text
    • http://unseenadventure.com/userfiles/file/78571288287.pdfIn PDF document text
    • 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_off0000c809.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC809 18024 bytes
SHA-256: efd0b9124b238166c7ffe306a26de9fba774d68a0b49189950e91ce8863b7ba8

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