Malicious PDF — malware analysis report

Static analysis result for SHA-256 e0ace4fcd847b69c…

MALICIOUS

PDF

88.1 KB Created: 2021-09-09 00:21:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: c55190f61831261562ba5e385505d34f SHA-1: 2eb8af9722a0b11826b1c37a4b2d8ace8ee2078e SHA-256: e0ace4fcd847b69ca3f53c7e8b8413c942183379fa9362099dc8e972391b269d
142 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external URIs, many of which are part of a link farm on disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution. The presence of embedded JS suggests an attempt to execute code or redirect the user to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://huntic.ru/uplcv?utm_term=gfx+tool+for+pubg+apk+free+download
    • http://mediasingrid.com/js/new/fckeditor/userfiles/file/25107708749.pdf
    • https://mamap.in/ci/userfiles/files/50869571038.pdf
    • https://www.larche-de-jules.fr/ckfinder/userfiles/files/38906641127.pdf
    • http://eastendmediation.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/60829988998.pdf
    • https://sskundal.com/userfiles/file/nazoxuvoro.pdf
    • https://asesoriagade.com/app/webroot/files/files/27346839143.pdf
    • https://dichvuketoansg.com/luutru/files/daruvene.pdf
    • https://www.afoa.org.ar/backend/ckfinder/userfiles/files/51608126516.pdf
    • http://bayernglobal.de/userVZ/file/gawubavavobubovitulexetul.pdf
    • http://xn--80ahcjevtqq.xn--p1ai/ckfinder/userfiles/files/22345798977.pdf
    • https://cutletsmeat.com/wp-content/plugins/formcraft/file-upload/server/content/files/161302e9e11454---zopuvagino.pdf
    • https://amezdigital.com/wp-content/plugins/super-forms/uploads/php/files/210f0cb14776daba567ef9b9a4df1c43/kureruxep.pdf
    • https://bunexim.dascalita.ro/app/webroot/files/userfiles/files/3983998080.pdf
    • https://ehlibeytalimleri.com/resimler/files/89102325405.pdf
    • http://greenbiotech.vn/uploads/userfiles/file/juborafurekawiposixasima.pdf
    • https://smobiil.eu/userfiles/files/16876138868.pdf
    • http://keystoparadise.com/userfiles/files/67787498066.pdf
    • http://educasters.co/ckfinder/userfiles/files/79987018308.pdf
    • http://turksebruiloften.nl/userfiles/file/65056442740.pdf
    • http://aotwresort.net/ckfinder/userfiles/files/rakebenoxomoxibali.pdf
    • http://dailymaydemtien.com/userfiles/files/tagokepasifukufarukoj.pdf
    • http://vipnjl.com/userfiles/files/26121727245.pdf
    • http://vimar.ua/userfiles/files/76058576854.pdf
    • http://mintaialuminum.com/d/files/jibisu.pdf
    • http://lse.hu/userfiles/file/nitojojebu.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_off0000ed3f.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xED3F 16792 bytes
font_01_sfnt_off00010551.bin
324c38cbf14ee2e615b35860542f9e1872ca40c6d707f4198eb08a61fb754ece		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10551 19628 bytes
font_02_sfnt_off00013912.bin
4d59e42c07cc9ce641335cbdebc1c7e195b3c2eb3681531569029a2c4ea00f1d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13912 10972 bytes

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