Malicious PDF — malware analysis report

Static analysis result for SHA-256 e463b6fd05f62a3d…

MALICIOUS

PDF

64.0 KB Created: 2021-09-04 20:09:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 59cc17ff46954d814c8221cd95ab35be SHA-1: 1799b6194f21295a59c3023411e0f27e07c2edf5 SHA-256: e463b6fd05f62a3d3cf37d0c38027472d78d035901076661c964f8b8b3720487
94 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains numerous links to external websites, many of which are hosted on compromised CMS platforms. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a pattern of using disposable hosting for link farms, suggesting a phishing or malware distribution attempt. The ML classifier also flagged this PDF as malicious with high confidence. No scripts were extracted, but the primary attack pattern involves directing users to malicious URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9183

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=work+performance+evaluation+form+pdf PDF link annotation
    • https://jfefood.com/wp-content/plugins/super-forms/uploads/php/files/9fa71b522c0981f63fc97674be1ee7c3/45924412304.pdfIn PDF document text
    • https://www.isnb.co.uk/wp-content/plugins/super-forms/uploads/php/files/31635b0d1e29d2ac3685a5937f623ef1/gobonexe.pdfIn PDF document text
    • http://the100voicesofgospel.de/fichiers/newsletter/file/pujojagibusorumarovije.pdfIn PDF document text
    • https://hoovermaids.com/wp-content/plugins/super-forms/uploads/php/files/31e0021cb46f4b6e02f447c1590e5265/sutojimijijuv.pdfIn PDF document text
    • http://auto4-spb.ru/public/images/ckfinder/files/dipepoturaxokufudofeg.pdfIn PDF document text
    • https://dermo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ad0f9bcf9e1---retevujotowijezegenuk.pdfIn PDF document text
    • https://krzczonowice.pl/gfx/file/rijafavajap.pdfIn PDF document text
    • http://yer-krasnodar.ru/ckfinder/userfiles/files/15929149503.pdfIn PDF document text
    • https://lllk.ru/wp-content/plugins/super-forms/uploads/php/files/beafcd26ab72f834bffb6ad9f6dd895b/watawumavunivutiruz.pdfIn PDF document text
    • https://www.tonygssoulfood.com/wp-content/plugins/super-forms/uploads/php/files/5d66af2975aafbaf0580255d40f979f4/nunepipi.pdfIn PDF document text
    • http://sammyuriasproperties.com/userfiles/files/3829748187.pdfIn PDF document text
    • http://www.rify.us/cms-uploads/files/batigoxevawenope.pdfIn PDF document text
    • http://beckydavidsonhomes.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ab147981ab6---41554573550.pdfIn PDF document text
    • http://www.inhd.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160947138f3377---69144401605.pdfIn PDF document text
    • http://brandweeramsterdamamstellanden.nl/userfiles/file/jibofuvuxomuzinad.pdfIn PDF document text
    • https://spencershaulageltd.co.uk/wp-content/plugins/super-forms/uploads/php/files/4712232bda8a7c8ef8255273f7adedc0/10698000297.pdfIn PDF document text
    • http://mirandatutoringcentre.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1607957ac6f7bd---zikuwiguzarufotifugidito.pdfIn PDF document text
    • http://www.socalgreatwhite.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608edf2c592d4---novotajinuwonuni.pdfIn PDF document text
    • http://88cpap.com/userfiles/files/voziruvisuburajofavazope.pdfIn PDF document text
    • http://prochem.vn/images/uploads/files/58827113499.pdfIn PDF document text
    • https://mindspacepsytherapy.com/upload/ckfinder_temp/files/20210526193253.pdfIn PDF document text
    • http://tkhomedeco.com/assets/uploads/ckedit/files/20210714072936.pdfIn PDF document text
    • http://parmalab.it/userfiles/files/52698969634.pdfIn PDF document text
    • https://bjjewels.net/nbloom/fckuploads/file/87885229903.pdfIn PDF document text
    • https://kodeac.com/wp-content/plugins/super-forms/uploads/php/files/1gm378q8j1pelp7bibsh4ke02r/mipofonojofaxopu.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_off0000df65.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF65 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1