Malicious PDF — malware analysis report

Static analysis result for SHA-256 585f2cde5e5538e9…

MALICIOUS

PDF

77.9 KB Created: 2021-09-16 13:30:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 49d66c3321712e8141938a6189af681e SHA-1: b9e4ca03e406d81157077577b1bcec5ebbf60e1b SHA-256: 585f2cde5e5538e906c9eaa18bb202e7617c78c0d599ec5c3cd3b34d58e44aa2
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript, a common technique for executing malicious code within documents. The ML classifier and ClamAV detection strongly indicate malicious intent. The embedded JavaScript likely redirects the user to one of the numerous external URLs found in the document, which are often used for phishing or to download further malicious payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

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://dsverano.com/UserFiles/File/xawuzilemuzusomipozo.pdf In PDF document text
    • http://king-pro.com/userfiles/files/80669910955.pdfIn PDF document text
    • http://banquat.com/userfiles/files/87893885660.pdfIn PDF document text
    • https://www.acta-mobilier.fr/ckfinder/userfiles/files/46973984265.pdfIn PDF document text
    • http://montpellier-businessplan.fr/mbp/upload/images/images/upload/ckfinder/mezubuzeviwemejuker.pdfIn PDF document text
    • http://www.hkwebdesign.com.hk/wp-content/plugins/formcraft/file-upload/server/content/files/161394104c5026---tajugasefosur.pdfIn PDF document text
    • http://nwatchonline.net/userfiles/file/pusogufakip.pdfIn PDF document text
    • https://namastehealth.in/wp-content/plugins/super-forms/uploads/php/files/gpaeq7rqtsv1kjlfoqjcoemedu/wawuwuwatojo.pdfIn PDF document text
    • https://luxesystem.site/js/ckfinder/userfiles/files/55709167107.pdfIn PDF document text
    • http://secondhandgraphics.com/usrfiles/file/revegosakalukiremoneli.pdfIn PDF document text
    • http://mylodge-naoshima.com/dutidijoxotodefofuzofi.pdfIn PDF document text
    • https://showdetango.com/bafa/userfiles/file/wawalazosevuvarur.pdfIn PDF document text
    • https://jocafoto.com/fotos/file/zugukigavoguvizum.pdfIn PDF document text
    • http://nataliashishkina.com/userfiles/file/juwuw.pdfIn PDF document text
    • https://newtop-eg.com/userfiles/file/xarogebubokoxadiw.pdfIn PDF document text
    • https://senfina.top/uploads/files/tekuzirebezipalipa.pdfIn PDF document text
    • https://farsiherbal.com/cache/fck_files/file/fesufapokitegumexuvatan.pdfIn PDF document text
    • https://micsys.in/userfiles/file/zigovafolusag.pdfIn PDF document text
    • http://kayapaliinsaat.net/file/vikedofumiruweberomuw.pdfIn PDF document text
    • http://hasomedia.com/userfiles/file/virimapogelezupevugopu.pdfIn PDF document text
    • https://uzmanwebci.com/calisma2/files/uploads/56304995872.pdfIn PDF document text
    • http://sieuthicayxanh.vn/webroot/img/files/43645557807.pdfIn PDF document text
    • https://shoppingplanet.ro/ckfinder/userfiles/files/49854392979.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/GLLx1DTH0VQ/uplcv?utm_term=mario+theme+sheet+musicPDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ced1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCED1 10440 bytes
SHA-256: c71e0bdac6198e4ae1fa477217d2fdd1734badab99f94b6e87792adf0ea57f84
font_01_sfnt_off0000e690.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE690 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000fea2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEA2 17044 bytes
SHA-256: 9920c02a49d763ec595026e9f052e808da18dfd1eea892e881bdccc4d462e220

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