Malicious PDF — malware analysis report

Static analysis result for SHA-256 019f8c926e0bffd3…

MALICIOUS

PDF

67.9 KB Created: 2021-09-05 14:54:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 6804eb45aa0140d29c2873b1c7061e74 SHA-1: 9a050a96b39525fe0c5f9436bce327a4d06eeec2 SHA-256: 019f8c926e0bffd3ccc8a784eea44f3fe40d5835045b4b09ea7be9ebc8ed56d4
94 Risk Score

Malware Insights

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

The PDF contains a link farm directing users to multiple compromised WordPress upload directories. The ML classifier also flagged this PDF as malicious. The presence of numerous links to potentially malicious content suggests an attempt to lure users to phishing sites or download further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5541

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 http://xn--90ad5ackt1d.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/d4f9d997709c72235124a5cc26f740f3/wosonopajuganesutedixava.pdf In PDF document text
    • https://hippodrome-compiegne.fr/www/uploads/file/fexuferepezomule.pdfIn PDF document text
    • https://www.frankreich-ferien.ch/wp-content/plugins/formcraft/file-upload/server/content/files/160c6528660094---88140699113.pdfIn PDF document text
    • http://vina2002.com/uploads/files/18869833183.pdfIn PDF document text
    • http://pamat.ro/UserFiles/file/28246745948.pdfIn PDF document text
    • https://militarynetwork.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160d0596f0f98b---25989346383.pdfIn PDF document text
    • https://premiumvipbusiness.com/wp-content/plugins/super-forms/uploads/php/files/242d9a7dfec34bb2fad33bc75ba8ae34/vuxeb.pdfIn PDF document text
    • http://npi-management.org/ressource/site-image/files/95459870105.pdfIn PDF document text
    • https://srsatta.com/ckfinder/userfiles/files/79860150124.pdfIn PDF document text
    • https://emergent-partners.com/wp-content/plugins/formcraft/file-upload/server/content/files/160da406ceefc1---vuvutedapoluki.pdfIn PDF document text
    • http://studiotecnicoarduini.eu/userfiles/files/81438813545.pdfIn PDF document text
    • http://casier-a-bouteilles.fr/file/ketiwijifunamigetoz.pdfIn PDF document text
    • https://deewo.de/wp-content/plugins/formcraft/file-upload/server/content/files/160b0e5a8ae83f---42047747518.pdfIn PDF document text
    • http://alicekhenrylawoffice.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/87888557967.pdfIn PDF document text
    • https://www.ideaklinikbursa.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607202f420bef---duxar.pdfIn PDF document text
    • https://www.tifdip.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b36f70bbac4---seratusotelininez.pdfIn PDF document text
    • http://tmacfashion.com/ckfinder/userfiles/files/38648415201.pdfIn PDF document text
    • https://bindazzled.com.au/wp-content/plugins/super-forms/uploads/php/files/1c326a7e4980e356731065b8e3aaa072/53608848273.pdfIn PDF document text
    • http://signauction.net/userfiles/file/jodigozisud.pdfIn PDF document text
    • https://minutesnap.com/wp-content/plugins/super-forms/uploads/php/files/7801276b3b7ce03f6aeab330035dc765/fazetararativef.pdfIn PDF document text
    • http://joshuadacosta.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a79a23672a0---3881164804.pdfIn PDF document text
    • https://sharidendesignasphalt.com/wp-content/plugins/super-forms/uploads/php/files/9af5a32e9005c3890003c8b8ccb4ef7d/25917605739.pdfIn PDF document text
    • https://profbuhotchet.ru/wp-content/plugins/super-forms/uploads/php/files/be41b2d07c0b2d53142e020a6b658f0e/24636091789.pdfIn PDF document text
    • http://aryajob.com/user_upload/file/lesizuwonitisagabodaw.pdfIn PDF document text
    • https://kawanmto.info/contents//files/90583808298.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/GLLx1DTH0VQ/uplcv?utm_term=quran+color+coded+tajweed+pdfPDF link annotation
    • 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_off0000bedd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBEDD 17252 bytes
SHA-256: a1e3c25213b785c36d8dc14166e573f48001020a0193607632f7cac56702b4ab
font_01_sfnt_off0000eb5d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB5D 10728 bytes
SHA-256: 42341c923cb6cc7c0097fe448af93d3b3aea6aed0049ebf4de1c2634144e2190