Malicious PDF — malware analysis report

Static analysis result for SHA-256 94ef3e3fd3d116c7…

MALICIOUS

PDF

85.7 KB Created: 2021-07-15 15:14:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: e7db457d90c5ac031573e37b8ab40777 SHA-1: 240425b39facabd4dacac4cc968f152e34f82155 SHA-256: 94ef3e3fd3d116c7eec8e44eb33283e060c32fa5c9e7c69595ee6b0eae7383f7
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document functions as a link farm, containing numerous URLs that point to compromised WordPress upload directories and other disposable hosting. The primary purpose appears to be redirecting users to malicious content, likely for phishing or malware distribution. No scripts were extracted, but the structure and URL patterns are indicative of a malicious intent to lure users to external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

Heuristics 5

  • 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://alenakovalchuk.ru/wp-content/plugins/super-forms/uploads/php/files/cd0205aaa9c6d0bfe181cab4ce7af33b/gugoxomukatuzorobaliv.pdf
    • http://minicabii.com/survey/userfiles/files/71269141434.pdf
    • http://secohthailand.com/file_media/file_image/file/keninovufazawawukovog.pdf
    • http://palyavalaszto.hu/teszt/upload/file/32780071920.pdf
    • http://plenar.hr/wp-content/plugins/formcraft/file-upload/server/content/files/160be498595d2a---roxolekidom.pdf
    • https://eatorhours.org/e-bussiness/fckimages/file/48362646043.pdf
    • http://vinmexindia.com/uploads/xepegegon.pdf
    • http://www.sbawerribee.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1606f7b7009c0b---88181650726.pdf
    • http://coinproject.com/userfiles/image/file/63282160173.pdf
    • http://foire-fromages-et-vins.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084848d656ce---dejotedimal.pdf
    • https://www.idahomedia.com/wp-content/plugins/super-forms/uploads/php/files/51d6885f20f1c90930f9a292bb34d76b/xodanavug.pdf
    • https://newat.ru/wp-content/plugins/super-forms/uploads/php/files/666844e8995bc4a3d08d065422eda03d/1622843070.pdf
    • http://fotografieindex.nl/images/uploads/nedena.pdf
    • http://xn--om2b25zm6igqb.com/ckupload/files/12078139683.pdf
    • https://fermuar.com/wp-content/plugins/formcraft/file-upload/server/content/files/16086be173b279---44172118459.pdf
    • https://ethiquedevelopers.com/wp-content/plugins/super-forms/uploads/php/files/5b9840289b255d77793986e803017cdd/98539073268.pdf
    • http://countrysquirefoods.com/wp-content/plugins/formcraft/file-upload/server/content/files/16086a2395b220---zomivi.pdf
    • https://luxartparquet.com/wp-content/plugins/super-forms/uploads/php/files/094c859dcf171e4557aaa1fc43ad7039/vavasoder.pdf
    • http://www.northeastmarquees.com/wp-content/plugins/super-forms/uploads/php/files/04374a7c081e64efd2e343e7875ede37/70656679816.pdf
    • http://broadviewlibrary.org/uploaded_bvlib/file/69629173635.pdf
    • https://llsindia.in/FCKeditor/file/jajogozoxomusiwib.pdf
    • https://k-kompany.ru/wp-content/plugins/super-forms/uploads/php/files/6b36c7f6317bc6cc47c1014d8ccea07c/sajikavemo.pdf
    • http://insidethedigitaltrend.biz/userfiles/file/79846076564.pdf
    • http://alfadent-volg.ru/images_uploads/files/59002182422.pdf
    • http://global-poseg.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606eb02841e49---wetedut.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/DOqCt-cVA4I/uplcv?utm_term=addition+of+hbr+to+2+methylpropene+in+the+presence+of+hydrogen+peroxide+produces
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e8c6.bin
53eefbecef4fe563cfcbacf735b1fb49513b6c0951df8afaf35c9083daa313e2
pdf-font-stream PDF embedded font (sfnt) at offset 0xE8C6 11460 bytes
font_01_sfnt_off00010359.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x10359 16792 bytes
font_02_sfnt_off00011b6b.bin
2b8e2d3c808d8368fa12eb3a6da7c1a22550bdbcf4b480f51a1ed3e89f1d8c76
pdf-font-stream PDF embedded font (sfnt) at offset 0x11B6B 17212 bytes