Malicious PDF — malware analysis report

Static analysis result for SHA-256 9a2aa03bbaa54275…

MALICIOUS

PDF

70.9 KB Created: 2021-09-30 19:13:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: b7e63b0f0252bc52223376d66d2d9eee SHA-1: 6bc142dca4db5cce3d556b155b013b12ad4e424d SHA-256: 9a2aa03bbaa54275439f92d70d0fc8f4a76713d2532b2fd61834e071a9aa5d12
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and a large number of external URIs, many of which are hosted on potentially disposable domains. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to redirect users to phishing sites or download further malware. The embedded JavaScript is a common technique for initiating malicious actions within PDF documents.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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
  • 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://inprovit.com/ckfinder/userfiles/files/demada.pdf
    • http://boracayg.com/FileData/ckfinder/files/20210921_14E773C93A62C08D.pdf
    • http://concilianavarra.com/userfiles/files/37172740486.pdf
    • http://odesignlab.ru/admin/ckfinder/userfiles/files/xunafonodapupima.pdf
    • http://www.synagoge-stommeln.de/ckfinder/userfiles/files/nigijegejudosedorel.pdf
    • http://sherwoodchambergolf.org/ckfinder/userfiles/files/ragipidenakokanozafuj.pdf
    • https://vanphongphamhienluong.com/upload/files/37570312256.pdf
    • http://tipkeo.com/js/ckfinder/userfiles/files/xokak.pdf
    • http://oikoscoccatoarchitettura.com/userfiles/files/pibura.pdf
    • http://orbitsecurity.qa/pro_mvp_tech/uploads/file/54698043210.pdf
    • http://guojingmall.com/userfiles/file///28667712533.pdf
    • http://tlca.com/Content/uploads/files/43858303637.pdf
    • https://geneolock.com/ckfinder/userfiles/files/nuwefoweliv.pdf
    • https://www.la-providence-ehpad.fr/ckfinder/userfiles/files/sikumosinuzurunejero.pdf
    • http://americasbestwingspa.iorderfoods.com/uploads/files/merajavoxaluxi.pdf
    • http://oldadmin.k12cart.com/media/files/8856556781.pdf
    • http://clairvoyantinfotech.com/demo/images/49510503043.pdf
    • http://careerpathrecruitment.com/swapscan/app/webroot/js/ckfinder/userfiles/files/78246380570.pdf
    • http://asesoriagarpe.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614ee5b0dd0cd---66586939405.pdf
    • https://villadorottya.hu/uploads/frontend/files/16001825482.pdf
    • http://idolyokocho.com/js/ckfinder/userfiles/files/badexolajetozu.pdf
    • https://www.mercato.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1613eae7bea4f1---wibuxepoduxakifene.pdf
    • https://anmoul.com/userfiles/file/daxapupemopaxenagodezivis.pdf
    • http://speckrepeg.by/UserFiles/files/moxugalube.pdf
    • http://landpas.pl/upload/file/majabuju.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/DOqCt-cVA4I/uplcv?utm_term=dil+diyan+gallan+2019+full+movie
    • 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_off0000b456.bin
dd354c24330a7d9745accfc7d64322ba76d00141a9d623ac47125f706a9cdb8b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB456 11076 bytes
font_01_sfnt_off0000cdfe.bin
2eb72cdf53dabd6f495f599296fd9b96b6e933b94132664113f40d0670801a96		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCDFE 15512 bytes
font_02_sfnt_off0000f554.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF554 16792 bytes

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