Malicious PDF — malware analysis report

Static analysis result for SHA-256 ea0d7d4998553678…

MALICIOUS

PDF

76.7 KB Created: 2021-09-20 02:49:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 2fac10857fb6083f89cee21ad82b800a SHA-1: 98662c9004d6cf699378753ec61a5840530370bb SHA-256: ea0d7d499855367878a45c01a456abcd20875eef32614ac7fe8996108eff82db
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and a high number of external links, many pointing to disposable domains, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent, likely to redirect users to malicious sites or download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9948

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://infrive.ru/uplcv?utm_term=apk+dream+league+soccer+hack PDF link annotation
    • https://booknowrentalimo.ch/userfiles/files/68255383000.pdfIn PDF document text
    • http://vers-ma.de/userfiles/file/gufaturavo.pdfIn PDF document text
    • https://www.shipgo17.com/plugin/ckeditor/ckfinder/userfiles/files/24185521286.pdfIn PDF document text
    • http://hourinkan.net/js/upload/files/bapaxekaf.pdfIn PDF document text
    • http://jinruily.com/UploadFile/file/20210904221304546.pdfIn PDF document text
    • http://zuche0551.com/upload/file/36253604701.pdfIn PDF document text
    • http://hoitruyengiaocodocvietnam.com/uploads/image/files/mutozinamozowigomu.pdfIn PDF document text
    • http://usarsenal.it/userfiles/files/likozutemuximo.pdfIn PDF document text
    • https://www.uflo.edu.ar/ckfinder/archivos/documentos/fowedisuwuwuviroxu.pdfIn PDF document text
    • http://comac-international.cz/userfiles/file/movadekabevukokubimo.pdfIn PDF document text
    • http://dermatologomiguelgallego.com/miguel/fck/file/fugixikofeki.pdfIn PDF document text
    • https://marblo.marblobaths.ph/app/webroot/img/files/73115991180.pdfIn PDF document text
    • http://xn--xhq021fvrwdth.com/d/files/45732223638.pdfIn PDF document text
    • http://geose.ru/userfiles/file/66392632341.pdfIn PDF document text
    • https://atcotourismtravel.com/userfiles/file/48786778893.pdfIn PDF document text
    • http://studiobaldizzone.com/userfiles/files/68934017292.pdfIn PDF document text
    • http://studioambienteterritorio.it/userfiles/files/92373041629.pdfIn PDF document text
    • https://ibeguiristain.com/userfiles/files/99303846359.pdfIn PDF document text
    • https://valserve.in/web/k/main_admin/ckfinder/userfiles/files/82948480615.pdfIn PDF document text
    • https://tekdalyapi.com/upload/ckfinder/files/levumazunejuvunomaxoziz.pdfIn PDF document text
    • https://ltes.tw-goods.com/UserFiles/files/bojaveluzinabe.pdfIn PDF document text
    • http://sinara.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/16130121ae924a---nuzizigilomitajaxojitusa.pdfIn PDF document text
    • http://hatowo.com/app/webroot/uploads/files/39485527105.pdfIn PDF document text
    • http://testsitehq.com/ckeditor-ckfinder-integration/uploads/files/39816058842.pdfIn PDF document text
    • 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_off0000cb27.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCB27 16180 bytes
SHA-256: 3dda1d6d5a663a22ba54a4e85c55f2a697861f281030edadf30b29bf98ee0a87
font_01_sfnt_off0000f49d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF49D 10840 bytes
SHA-256: 79b78014f7bf1c9c1c0f1ba95f6238de777cf994a3aa5a37f3ee1ce84ca57051
font_02_sfnt_off00010d79.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D79 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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