Malicious PDF — malware analysis report

Static analysis result for SHA-256 3e0aedad99d1765e…

MALICIOUS

PDF

80.4 KB Created: 2021-10-10 00:00:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: 739c0a625c838b1b4226dea82df4942c SHA-1: 45351a4b67f8f8a6547e9ceef51bb5c63be85524 SHA-256: 3e0aedad99d1765ee524df8188febc3eb34d7c4ebd58c76710a1ae9e5e53df2e
134 Risk Score

Malware Insights

MITRE ATT&CK
T1059.007 JavaScript T1566.001 Spearphishing Attachment

This PDF file was flagged as malicious by ClamAV and an ML classifier. It contains embedded JavaScript and a large number of external URIs, many of which appear to be part of a link farm hosted on disposable domains. The embedded JavaScript and the nature of the URLs suggest an attempt to redirect the user to malicious content, likely for phishing or to download further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://crewmak.ru/uplcv?utm_term=dls+2020+hack+unlimited+coins+and+diamonds+link+download PDF link annotation
    • https://repairbase.net/FCKeditor/editor/filemanager/connectors/php/images/file/duzasiruwalugabe.pdfIn PDF document text
    • https://www.nissan-utilitaires-melun.fr/ckfinder/userfiles/files/juzirowefelubawa.pdfIn PDF document text
    • https://www.sharpeningfactory.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612ed30bb108c---74826593961.pdfIn PDF document text
    • http://worldwidestationeryholdings.com/files/file/rosefunaz.pdfIn PDF document text
    • https://eastmangroupllc.net/ckfinder/userfiles/files/fizikosetaxogazubunoz.pdfIn PDF document text
    • http://rbtyutj01.com/userfiles/files/52783567268.pdfIn PDF document text
    • http://bsa-billiard.by/images_from_html_editor/file/kozekividisij.pdfIn PDF document text
    • http://shippingengineering.com/files/ckeditorothers/50055560663.pdfIn PDF document text
    • http://interfacetravels.com/app/webroot/js/ckfinder/userfiles/files/99584137676.pdfIn PDF document text
    • http://bjqyms.com/filespath/files/20210918165611.pdfIn PDF document text
    • http://playonathletics.com/userfiles/file/dovapuxukemudop.pdfIn PDF document text
    • http://abworder.com/uploads/files/8971061108.pdfIn PDF document text
    • http://lamarchesainterita.be/lamarchesainterita/imgdb/news/files/18325193674.pdfIn PDF document text
    • http://mixline.ru/img/lib/file/waxuguriruzibib.pdfIn PDF document text
    • http://codienlanhtrangia.com/Images_upload/files/56513530116.pdfIn PDF document text
    • http://agriturismoilnoceto.com/userfiles/files/2446693312.pdfIn PDF document text
    • http://1hozain.ru/files/userfiles/files/84313596947.pdfIn PDF document text
    • https://www.eecpowerindia.com/codelibrary/ckeditor/ckfinder/userfiles/files/sabazeterowitowuxatax.pdfIn PDF document text
    • http://galerie45.com/userfiles/file/38784735949.pdfIn PDF document text
    • http://habitat3.eu/userfiles/files/fajuxopolugupe.pdfIn PDF document text
    • http://www.primalegal.eu/wp-content/plugins/super-forms/uploads/php/files/qnq3gkq83555k0hf32mkjiliq0/vizam.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_off0000d299.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD299 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000eab0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAB0 11056 bytes
SHA-256: ab11dd13a7510f2eafa4e5ca07006183b221ddee65af980385dc61afdc895938
font_02_sfnt_off00010461.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10461 17544 bytes
SHA-256: d1a3a2b572f677bb58534ba1abf9c6a34732711f2d9684074a1fcfeb56336079

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