Malicious PDF — malware analysis report

Static analysis result for SHA-256 0ee51fdd6da7d2da…

MALICIOUS

PDF

73.3 KB Created: 2021-09-17 00:44:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: e09a79bc6152f42271c1ffd2ca603dd4 SHA-1: 9aa18ef6c25bdd237d7cc8ef33c260dd908ff84e SHA-256: 0ee51fdd6da7d2da7c9d4ab15e08398f012d5e2bdc57ef1f718fb348cd81a9cd
134 Risk Score

Malware Insights

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

The PDF contains embedded JavaScript and a large number of external URIs, many of which are hosted on disposable domains, indicating a link farm designed to obscure the true destination. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution. The embedded JavaScript is likely used to facilitate redirection or exploit vulnerabilities.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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 http://www.gabrielamaciel.net/images/content/file/9213371409.pdf In PDF document text
    • http://odumakus.com/uploads/files/wapokepe.pdfIn PDF document text
    • http://speakingaboutnetworking.com/ckfinder/userfiles/files/zozifepedemol.pdfIn PDF document text
    • http://2015.letnifestiwal.pl/ckfinder/userfiles/files/69504092596.pdfIn PDF document text
    • http://global-leasing-management.com/uf/file/ripozubaruzerapi.pdfIn PDF document text
    • http://dgjinhak.kr/DATA/upload/files/202109170626149013.pdfIn PDF document text
    • http://fapannimario.it/userfiles/files/fasipotuxibogeje.pdfIn PDF document text
    • http://gshosnab.ru/userfiles/file/84546867413.pdfIn PDF document text
    • http://rspon.pl/images/wyswig_images/file/1561995873.pdfIn PDF document text
    • http://droprint.my/home/ququ4923/public_html/userfiles/file/wowujuwowene.pdfIn PDF document text
    • http://www.szphotar.com/admin/img/files/jimaku.pdfIn PDF document text
    • https://safetypadlocks.eu/eurostyl/photos/file/32607757301.pdfIn PDF document text
    • https://g-ortho.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1613561a3ee95e---vadepipog.pdfIn PDF document text
    • http://yejida.com/userfiles/file/57841385470.pdfIn PDF document text
    • http://kingsauto-bar.com/js/upload/files/nuzufetu.pdfIn PDF document text
    • https://lwim-ouargla.dz/ar/files/ninifegoj.pdfIn PDF document text
    • http://chinhsuasolieu.com/media/files/nobetewiparane.pdfIn PDF document text
    • https://alakharia.com/public_html/userfiles/file/kudobodarasaxusepilip.pdfIn PDF document text
    • https://xn--psg-9lac.hu/files/files/27253626215.pdfIn PDF document text
    • http://www.hz-kontejnery.cz/ckfinder/userfiles/files/dasefelaremajugibekubapiv.pdfIn PDF document text
    • https://digireg.at/upload/52850889434.pdfIn PDF document text
    • http://restravel.ru/ckfinder/userfiles/files/wixopuwot.pdfIn PDF document text
    • http://phuongsen.com/img-chamthi/files/14558012133.pdfIn PDF document text
    • https://travellifeafrica.com/ci/userfiles/files/jimimonikiburanipuvumu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/ngfLrbzwjls/uplcv?utm_term=play+store+for+windows+8PDF 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_off0000baec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBAEC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d2fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD2FE 16936 bytes
SHA-256: a699e255bf83fc654f26e67c21050db7f4a8864e93872a65829230a0496f42c0
font_02_sfnt_off0000fef4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEF4 10756 bytes
SHA-256: 2b4d362e18ee99e8e20d59b33017e2e47d34ae4e5018c776f3c490912cc21067

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