Malicious PDF — malware analysis report

Static analysis result for SHA-256 7ccc149db5643c1f…

MALICIOUS

PDF

84.6 KB Created: 2021-09-15 23:14:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 3aec23bf9b28a971af8813c71b092af6 SHA-1: 4c22d49153db7d24db7c14302e09e2bd2b4aa5f4 SHA-256: 7ccc149db5643c1f3dc833dd4ccf55add22749985faa7bd6e1a161df664ea331
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 point to disposable domains. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. The embedded JavaScript is a common technique for initiating malicious actions within PDFs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

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://laborke.ru/uplcv?utm_term=how+to+copy+in+android+phone PDF link annotation
    • http://auswallendorf.de/userfiles/file/jerib.pdfIn PDF document text
    • http://amdind.com/userfiles/file/5246643144.pdfIn PDF document text
    • http://dobrejaja.com/Upload/file/3208282575.pdfIn PDF document text
    • https://aldurra.ly/images-editeur/img/file/89517105294.pdfIn PDF document text
    • https://kaptenhoki.net/contents/files/45103745985.pdfIn PDF document text
    • https://nakatarikaszel.pl/app/webroot/userfiles/file/vaxopirudenobesegavo.pdfIn PDF document text
    • http://seoaudytor.pl/userfiles/file/40774063198.pdfIn PDF document text
    • http://sdtrafficticketlawyer.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/wufir.pdfIn PDF document text
    • http://www.farmaciavictoriayjmleon.com/userfiles/files/fusojonapusolubit.pdfIn PDF document text
    • http://host.keraladreamhomes.com/~viswabrahmathach/admin/fckeditor/editor/filemanager/connectors/php/userfiles/file/55307236798.pdfIn PDF document text
    • https://dermatologie-francophone.com/userfiles/file/sarulokovuberejabozaj.pdfIn PDF document text
    • https://clinicaalcantara.es/sites/default/files/userfiles/file/rujutulapijipukut.pdfIn PDF document text
    • https://holzhaus-suedtirol.it/wp-content/plugins/formcraft/file-upload/server/content/files/1613a3eb6823fa---43326877501.pdfIn PDF document text
    • http://qtjdb.com/UploadFile/2021/09/06/file/20210906_122437_134.pdfIn PDF document text
    • http://proficlim.ru/public/userfiles/file/23448193381.pdfIn PDF document text
    • http://styrexon.cz/userfiles/file/pakaso.pdfIn PDF document text
    • https://mgs-on-track.com/app/webroot/userfiles/file/30271348375.pdfIn PDF document text
    • https://itracmediav5.com/ckfinder/userfiles/files/41077394849.pdfIn PDF document text
    • http://ancheng-medical.com/uploadfile/files/nefolanogobabow.pdfIn PDF document text
    • http://autosvanbeek.nl/mindcms/js/ckf/userfiles/files/2297576445.pdfIn PDF document text
    • https://satnamunicipalcorporation.com/admin/ckfinder/userfiles/files/juvadilawero.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_off0000e692.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE692 10588 bytes
SHA-256: 6591e2bbb6899a58cad3c3ce805b4565d49baeadd7b234d645734c3d0391a217
font_01_sfnt_off0000feb0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEB0 17620 bytes
SHA-256: 01fb849351be1f455daadbd5abddf2cc834012e231d4c3aa43ca81292ca29cb1
font_02_sfnt_off00012cc6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12CC6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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