Malicious PDF — malware analysis report

Static analysis result for SHA-256 67220b365f48e488…

MALICIOUS

PDF

76.2 KB Created: 2021-09-04 06:35:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: e8294c055d553905bdd7f430124f8903 SHA-1: af190788c62a7f768e22250fd614747860539041 SHA-256: 67220b365f48e4884c3545fedbe1ec83fb2e38bd4b1ce8b65375737fdeb5ce53
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It functions as a link farm, containing numerous URLs pointing to various websites, many of which appear to be compromised WordPress installations. The presence of these links suggests the document is intended to lure users to external sites, potentially for phishing or to download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8582

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://irlanc.ru/uplcv?utm_term=factoring+worksheet+practice
    • http://pro-roubenky.cz/UserFiles/File/93763111829.pdf
    • https://greenturtleproductions.com.au/wp-content/plugins/super-forms/uploads/php/files/c42849020d9f364d459f1106c862883c/23384961216.pdf
    • https://gtsonline.nl/wp-content/plugins/super-forms/uploads/php/files/48cdseuf09djflr8jvqjmq82iq/70104213255.pdf
    • https://whiteelephant.co.in/wp-content/plugins/super-forms/uploads/php/files/0f64eb504c9cb91f1b4dc1334abca004/golubopesasutas.pdf
    • https://www.teppiche-waschen-hamburg.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a340e554c54---beloluwafukedoni.pdf
    • http://akcjonariusz.com/UserFiles/file/tebepuwuw.pdf
    • http://dilimkebab.com/userfiles/file/kepozegotazizazozako.pdf
    • https://njsolarpower.com/wp-content/plugins/super-forms/uploads/php/files/890a06d51c0c25cad1a372dccc1f2b40/jarubofoxuxabajeg.pdf
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d1eebccb47d---jafunuwiniwab.pdf
    • http://teerosy.com/ipp/images/uploads/files/66427639835.pdf
    • https://baatco.com/ckfinder/userfiles/files/11646005949.pdf
    • https://ntct-dz.com/ckfinder/userfiles/files/47199170643.pdf
    • https://hasekei.jp/userfiles/file/80382521354.pdf
    • http://bethelhanberryaaa.com/clients/2/24/2465ef4bb9bb1b7382310ae17d7cafeb/File/wefejutawasusu.pdf
    • http://lindendirect.com/tempimg/file/59364390116.pdf
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/160f441f1a3f0d---22241825786.pdf
    • https://vannordenvastgoed.nl/userfiles/file/fuvanujinariri.pdf
    • https://xn----9sbccjdbca7cyaieg1a3j.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/1a8797d04c3743eda4abac86a2a665da/43744652603.pdf
    • http://fusen-es.info/yamituki-n/uploads/files/89448059720.pdf
    • http://greenplanetnepal.com/userfiles/file/77175301126.pdf
    • http://eastcoastbiker.de/sites/default/files/file/rijefum.pdf
    • http://www.peopleoftheheath.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e90c51aea64---68713062289.pdf
    • https://xanbiente.de/userfiles/file/nopelidilurokemov.pdf
    • https://polinagerz.ru/wp-content/plugins/super-forms/uploads/php/files/55sjngf9uvbhvdo11fbvbkbqti/detekudop.pdf
    • http://riskhedgetech.com/uploaded/file/165276025860c5778dc339a.pdf
    • 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_off0000da14.bin
7505aa32c78f97abf2a46676c9dd2d01cd998969647baa269bbcde420c7b75ce
pdf-font-stream PDF embedded font (sfnt) at offset 0xDA14 16496 bytes
font_01_sfnt_off000104ce.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x104CE 16792 bytes
font_02_sfnt_off00011ce5.bin
1b2b1544b92a919e046a2f4f1b60072edc5827a45337e3a22c381c813eec1978
pdf-font-stream PDF embedded font (sfnt) at offset 0x11CE5 10760 bytes