Malicious PDF — malware analysis report

Static analysis result for SHA-256 6921808999cf3e8d…

MALICIOUS

PDF

80.2 KB Created: 2021-09-18 04:18:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: a51cdde99833580448c095b59ca28875 SHA-1: d166be681cf1e9de47fb1dfc8f536200629c951d SHA-256: 6921808999cf3e8dfc3df997f98389d4f9a677dcf88469155fc41ab46741404d
156 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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
  • 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://irlanc.ru/uplcv?utm_term=new+version+of+talkatone
    • http://a-xian-coat.com/uploads/files/202109170701467870.pdf
    • http://studioprogettoarchitettura.eu/userfiles/files/49265298697.pdf
    • http://zhongjiukeji.com/upload_fck/file/2021-9-10/20210910235913766764.pdf
    • https://hotelritariccione.it/wp-content/plugins/formcraft/file-upload/server/content/files/1613dc0005b415---doposoruduli.pdf
    • http://cherriestattoo.com/ckfinder/userfiles/files/21829050952.pdf
    • http://bidadapatidar.com/userfiles/file/33345511465.pdf
    • https://www.dentaltaxpros.com/wp-content/plugins/super-forms/uploads/php/files/856684376fd1785c29c26a1c31a4eb0b/ninuwasotoxoviwokekazisup.pdf
    • https://ateneoarbonaida.com/wp-content/plugins/formcraft/file-upload/server/content/files/16131fcc75787a---32824459782.pdf
    • https://mosconi.net/userfiles/file/1881431245.pdf
    • http://ancient-theater.gr/media/file/53862420919.pdf
    • https://coolingrealestate.com/your-home-cleaner/FCKuploads/file/87500132018.pdf
    • http://lacasedescaraibes.fr/file/36125790847.pdf
    • http://www.fotografoeventimilano.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613e358537840---67380865128.pdf
    • http://oris-am.com/editor_up/voxanof.pdf
    • https://krusomying.com/data/file/17182294766.pdf
    • http://tpt.taipei/asset/uploads/files/vobujod.pdf
    • http://snsi.jp/image/news_file/fuzumurejodixuja.pdf
    • https://pottoka.info/files/galeria/files/dikosun.pdf
    • https://motionslam.com/wp-content/plugins/super-forms/uploads/php/files/ac1cc932cc9d397b8af15e9796d698f6/tijesoradodade.pdf
    • http://immobilieninvestors.org/userfiles/file/viwokesijupasederiw.pdf
    • http://kraljicabih.com/wp-content/plugins/formcraft/file-upload/server/content/files/16132d468db3f4---zenurokulodudelezi.pdf
    • https://usssecuritate.ro/userfiles/file/72612999805.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_off0000d516.bin
7604daa4fb35f9cecb22ef850e28f4ee70971036e3d1398261530272c18c48d8		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD516 10428 bytes
font_01_sfnt_off0000ecf3.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xECF3 16792 bytes
font_02_sfnt_off00010505.bin
31ce9374ee523fa05da5c47f1be591a09440adc9f4d7398f3b7e06aeca81e387		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10505 17572 bytes

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