Malicious PDF — malware analysis report

Static analysis result for SHA-256 f9036e37422be264…

MALICIOUS

PDF

85.4 KB Created: 2021-06-27 19:16:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 45ecb8af411b4af2a184fa6203c48e21 SHA-1: 5127a31fcfeb2b8989f6f4891bb057749b4782a8 SHA-256: f9036e37422be2641fbf3220445a2512cb6de9f3a5eb01f3bc3311da967895e8
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external links, many pointing to compromised WordPress sites and disposable hosting. These links likely serve as a lure to redirect users to malicious content or phishing pages. The ML classifier and ClamAV detection strongly indicate malicious intent, classifying it as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

Heuristics 7

  • 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.
  • 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://teenvolunteer.org/wp-content/plugins/super-forms/uploads/php/files/bed953cfe5b51413ece668964eab7f73/genunuxagajuxevopapewafem.pdf
    • https://dazzlin.co.uk/wp-content/plugins/super-forms/uploads/php/files/a96b196d59bf0d1a705274e35afe8c9e/bemixegap.pdf
    • https://hps-gruppe.com/wp-content/plugins/super-forms/uploads/php/files/8562ep4cft8onhqrdh6steohug/zosasivavuzavaze.pdf
    • http://arunimaflavours.com/userfiles/file/rarezabepato.pdf
    • http://thegrcinstitute.org/app/webroot/js/ckfinder/userfiles/files/5489911113.pdf
    • http://k-yoga.org/file_upload/spaw_upload/file/20210506104656.pdf
    • https://stef-nancy.fr/upload/document/kuranuzulewojez.pdf
    • https://marblobaths.com/app/webroot/img/files/18011487787.pdf
    • https://roadtoring.com/wp-content/plugins/super-forms/uploads/php/files/b91d5698e02c2323d085974a5e8228ed/kotiresegumiri.pdf
    • http://www.marcado.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16079981c8da7f---kurasilife.pdf
    • http://women-for-marriage.com/ckfinder/userfiles/files/datijivinikikaxad.pdf
    • http://drvision.org/wp-content/plugins/formcraft/file-upload/server/content/files/16070b2bccb3b8---95587302847.pdf
    • https://www.conkite.com/wp-content/plugins/super-forms/uploads/php/files/de9c370388f501289f39c38f779907d3/5679617387.pdf
    • http://446888.top/userfiles/file/rikibexututilulibibukada.pdf
    • http://itaindustrial.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a2a495be042---firizabolaxikulogimore.pdf
    • http://orhs89reunion.com/clients/77823/File/4146649350.pdf
    • https://k-barrierfree.com/FileData/ckfinder/files/20210619_5C3C809418C2F309.pdf
    • http://utuin.net/files/fckeditor/file/78694888530.pdf
    • https://alajuusa.ee/media/contents/file/rinidasomomamunazos.pdf
    • https://seedomoretravel.com/files/files/mesovaxetuwurin.pdf
    • http://bronia.org/userfiles/file/34343089810.pdf
    • http://www.sensible-seeds-premium.com/wp-content/plugins/formcraft/file-upload/server/content/files/16092b48ae4b20---41137823331.pdf
    • http://a-range.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1609ed1c3d4cb8---76889135883.pdf
    • https://transport-vehicules.fr/userfiles/file/salowizubafitagosuxe.pdf
    • https://lllk.ru/wp-content/plugins/super-forms/uploads/php/files/951bc3b90b45069c5469e6689878fd66/97433764500.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/6naE_Nh8_CY/uplcv?utm_term=handbook+of+fractures+6th+edition+pdf+free
    • 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_off0000e987.bin
51f37e54ceb79b55618ed6a3c5a4f75ef20a2f22cf539b2bac42038db77dfbca
pdf-font-stream PDF embedded font (sfnt) at offset 0xE987 17000 bytes
font_01_sfnt_off000115e7.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x115E7 16792 bytes
font_02_sfnt_off00012dfe.bin
253f6a2519a87f707c92a3dd44477acb96b595957d08757e1c4bef382e7ae1b4
pdf-font-stream PDF embedded font (sfnt) at offset 0x12DFE 11164 bytes