Malicious PDF — malware analysis report

Static analysis result for SHA-256 3eee0f277614d06e…

MALICIOUS

PDF

76.0 KB Created: 2021-09-05 18:06:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: d14eea010646d415196b7e6daee050ad SHA-1: 788b94141bc5c203eba5e765e6881d8810a7aa93 SHA-256: 3eee0f277614d06e5511e820c6276cbd9a068129889a99901c046d246a658350
196 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The heuristic 'SE_BROWSER_INSTALL_LURE' strongly suggests the document is designed to trick users into installing malicious software by posing as a necessary browser update or plugin. Multiple URLs extracted from the document point to compromised websites and link farms, likely used to host or distribute further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9948

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE
    Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
  • 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
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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://drafthe.ru/uplcv?utm_term=chrome+adobe+pdf+plugin+not+working PDF link annotation
    • http://kinel-hunter.ru/upfiles/file/30323200088.pdfIn PDF document text
    • http://wannawwannie.pl/userfiles/file/zomuvamosofitobagufizaga.pdfIn PDF document text
    • http://www.associatedomains.com/wp-content/plugins/formcraft/file-upload/server/content/files/16083abf94823c---xetawuzibitesom.pdfIn PDF document text
    • https://www.infratechgroep.nl/wp-content/plugins/super-forms/uploads/php/files/0d24abcc4f319b32b8b68058e23b13ed/61360951597.pdfIn PDF document text
    • https://dancleland.com/img/upload/file/dubanujoredabawik.pdfIn PDF document text
    • https://cheesykeju.com/contents//files/buduwijupa.pdfIn PDF document text
    • https://coffotea.com/uploads/files/202109011324506122.pdfIn PDF document text
    • http://seritour.com/rsm/files/xamoxotizasetigudisozudu.pdfIn PDF document text
    • http://www.chiringuitomediterraneo.com/ckfinder/userfiles/files/26582066521.pdfIn PDF document text
    • http://abnicum.ru/files/file/wodasapirinete.pdfIn PDF document text
    • https://www.ikedatosou.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609db559537ea---pasimisibix.pdfIn PDF document text
    • https://www.travelticket.com.au/wp-content/plugins/super-forms/uploads/php/files/ue07ueqpbm23ic8r0tsc3lt13e/32272519954.pdfIn PDF document text
    • http://bluekeydigital.com/images/pic/file/30353850161.pdfIn PDF document text
    • https://postelezmasivu-ostrava.cz/ckfinder/userfiles/files/ramedameb.pdfIn PDF document text
    • https://krygina40.ru/UserFiles/File/mirapenijokufexotapi.pdfIn PDF document text
    • https://laihouston.com/wp-content/plugins/super-forms/uploads/php/files/cacf535f2d7a8c1b3d1c1a119fbae5c7/lurusazudujesuroxuxowed.pdfIn PDF document text
    • https://www.chortho.co.uk/wp-content/plugins/super-forms/uploads/php/files/0klhka9opcdndsdikhsd5lb971/73747387007.pdfIn PDF document text
    • https://www.alongsideasia.com/wp-content/plugins/super-forms/uploads/php/files/1d549b8299f971b07b88af707c5f9757/34248025641.pdfIn PDF document text
    • http://popmetre.com/news/files/91247928068.pdfIn PDF document text
    • https://dadesigning.com/daduserfiles/files/jogilarulaxiwutojojes.pdfIn PDF document text
    • http://animalscipublisher.com/files/upfiles/file/81225868373.pdfIn PDF document text
    • http://trackeg.com/en/wp-content/plugins/formcraft/file-upload/server/content/files/160f9a71711a4e---widolowozitugesixef.pdfIn PDF document text
    • http://dydlhx.com/upfiles/file///vudilaxepixe.pdfIn PDF document text
    • https://outsourcedbackoffice.co.uk/wp-content/plugins/super-forms/uploads/php/files/b7d60e086af72b8b6c1fa39a8a591adf/zuxeni.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000be7e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBE7E 19676 bytes
SHA-256: 8c1a6115ed71812f861316283bfacb0ad27aa1b56eba6d242ff2a6e0dfbf77ac
font_01_sfnt_off0000f09d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF09D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000108b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x108B4 11224 bytes
SHA-256: 3b2e5e09e2778d721f8c2f3d42dd76eb3d37726738d3cf7419e605e622bdb772

Open this report in the interactive analyzer, or submit your own file for analysis.