Malicious PDF — malware analysis report

Static analysis result for SHA-256 cfedaf902e365190…

MALICIOUS

PDF

83.7 KB Created: 2021-08-03 13:21:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: a77fe4b10f3a4f5637c0678b4de80d64 SHA-1: 81498e7e1da86c2fddb921ec3392f98689061636 SHA-256: cfedaf902e365190867288b5c37cf9656595512022bcbbe55f65b803fad47cff
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and a link farm pointing to compromised WordPress sites, suggesting an attempt to redirect users to malicious content or downloads. The ClamAV detection and ML classifier strongly indicate malicious intent, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9978

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
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://ketchas.ru/uplcv?utm_term=pokemon+theme+song+in+hindi+cartoon+network+download
    • https://eminencesolutions.in/resources/userfiles/file/wubumowoduf.pdf
    • https://www.temsilcisitesi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b27d3ba2d2---wobukojiwoxemi.pdf
    • https://www.syah.org/wp-content/plugins/super-forms/uploads/php/files/45312f5a3ea631f84a72fde5e5be8a8c/daritubawofexafe.pdf
    • http://photographybynami.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a998ea0ad49---fixinixibipabewiduf.pdf
    • https://www.fmworks.com.tr/wp-content/plugins/super-forms/uploads/php/files/eg303g3ehhtbj7j7e6i8mn1lhq/55208554946.pdf
    • http://cogersquest.com/clients/f/f6/f6194b381802d71b6842d6160e8859b1/File/tupotuxilowapewiwuxibabow.pdf
    • http://famcareconnect.org/wp-content/plugins/formcraft/file-upload/server/content/files/1609fbcf27716c---1340505031.pdf
    • http://upperdublin1970.com/clients/3/3b/3b2fb281f4756d03d37a29c41a8c1d95/File/jejobitudote.pdf
    • http://dobraukraina.org/sites/all/sites/dobraukraina.org/files/37843961053.pdf
    • http://caacoding.net/wp-content/plugins/formcraft/file-upload/server/content/files/160816f8028d50---32273929691.pdf
    • http://friend5190.xyz/js/ckfinder/userfiles/files/54709217173.pdf
    • http://lnimeina.it/userfiles/files/gaxewubujesamex.pdf
    • http://bezpieczna-strefa.pl/wp-content/plugins/super-forms/uploads/php/files/5d31783e94a804d753723f77ce263ed6/76429477221.pdf
    • https://cms.blauraum.com/wp-content/plugins/super-forms/uploads/php/files/a290d645a0918115b7346552593c0c38/61667101898.pdf
    • http://xn--80aadq3ae7aa5k.xn--p1ai/upload/file/80963912798.pdf
    • http://aeskulap24h.de/wp-content/plugins/formcraft/file-upload/server/content/files/160f06855cd970---68235667290.pdf
    • https://zweiund40.com/wp-content/plugins/super-forms/uploads/php/files/kl1tsqkqf3aboo2cm16lom28hb/11377086053.pdf
    • https://provisionsinternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c97392e345a---7162925125.pdf
    • https://micro-logic.ro/images/uploaded/file/5627352491.pdf
    • http://endustriyelkiralama.com/wp-content/plugins/super-forms/uploads/php/files/oe08ro54tcum9vb1642fia0oh9/novapomarigakugirarobi.pdf
    • http://remobudostol.pl/pliki/jularetinokidujogawixu.pdf
    • https://hpx.com.ua/wp-content/plugins/super-forms/uploads/php/files/c94fcfb99640a586427571f0fd403dc5/11669028735.pdf
    • http://anipetkingdom.com/webroot/img/files/71848096282.pdf
    • http://brmhn.com/userfiles/file/20210525100342_69cc3r.pdf
    • https://indacphuc.com/wp-content/plugins/super-forms/uploads/php/files/bfqdncu9l60n25sp9j3n2vpa8r/salosuxovufelisiwajuju.pdf
    • 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_off0000dd4f.bin
5eea8976bf7c11a62eaa854f5bf3659d5924a57bd51dc3e87a51358a07254a28
pdf-font-stream PDF embedded font (sfnt) at offset 0xDD4F 17700 bytes
font_01_sfnt_off00010be0.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x10BE0 16792 bytes
font_02_sfnt_off000123f7.bin
7b0be57c04edd4cdb0a995f69e4667cd4b5a6b8a161768d2653566932a3298ee
pdf-font-stream PDF embedded font (sfnt) at offset 0x123F7 10996 bytes