Malicious PDF — malware analysis report

Static analysis result for SHA-256 eeced3d9d177a59d…

MALICIOUS

PDF

83.8 KB Created: 2021-09-23 04:56:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 606810d9a572c9ab1f5a7f7be4df6bdd SHA-1: 5dd05be0740811765753471498d95144141cddb0 SHA-256: eeced3d9d177a59dbb7f604fb36167d1d3e8031d910913ae54401e66263afc5e
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF contains embedded JavaScript and a large number of external URIs, many hosted on disposable domains, which is characteristic of phishing and malware distribution. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to deliver a second-stage payload via the embedded JavaScript and external links. The primary lure appears to be a fake download for a game, using a link farm to obscure the true destination.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://pixomot.ru/uplcv?utm_term=download+obb+real+racing+3 PDF link annotation
    • https://dadesigning.com/daduserfiles/files/junesu.pdfIn PDF document text
    • http://xn--80ackbssfuieecff0e8c.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/3j8p44llh2vpsj2slatcbkj286/22656305841.pdfIn PDF document text
    • https://realwebguys.com/wp-content/plugins/formcraft/file-upload/server/content/files/16145cb18f0c27---56006235150.pdfIn PDF document text
    • https://pierreseche.fr/userfiles/file/26565336208.pdfIn PDF document text
    • http://historico.uts.edu.co/portal/app/ckfinder/userfiles/files/74074450093.pdfIn PDF document text
    • https://ww150007.linebot.net/upfile/files/20210905005719.pdfIn PDF document text
    • http://www.emploi.nat.tn/ckeditor/ckfinder/userfiles/files/4761714757.pdfIn PDF document text
    • http://to-kajihan.net/js/upload/files/82255455154.pdfIn PDF document text
    • http://www.southforconstruction.com/frontend/web/ckfinder/userfiles/files/tanafufovijopi.pdfIn PDF document text
    • http://lab4050.com/upload/editor/file/bubelebobunixozufitexefex.pdfIn PDF document text
    • http://burbank.kopanramen.com/uploads/files/46283712785.pdfIn PDF document text
    • http://architettobotteonpierpaolostudioabacus.it/userfiles/files/mezidorifijiwu.pdfIn PDF document text
    • http://wolfpackbasketballacademy.com/content_docs/rekimodagemavimibinanuvum.pdfIn PDF document text
    • http://king-pro.com/userfiles/files/pezapesabewawoma.pdfIn PDF document text
    • http://folientastaturen.pl/_data/file/90391587299.pdfIn PDF document text
    • http://permanentnimakeup-brno.cz/userfiles/files/35361076725.pdfIn PDF document text
    • https://rh4-h1tapi-turbo.com/contents/files/lafibovedasegate.pdfIn PDF document text
    • http://geology.ie/wp-content/plugins/formcraft/file-upload/server/content/files/161357cc93019f---70069245468.pdfIn PDF document text
    • http://maurovalleferroarchitetto.eu/userfiles/files/80115445553.pdfIn PDF document text
    • http://thekitchendesignstudio.org/uploads/files/11002091775.pdfIn PDF document text
    • http://duquenne-moteurs.fr/webroot/upload/files/nolilepedepa.pdfIn PDF document text
    • https://yptea.com/data/fckeditor/files/79045492138.pdfIn PDF document text
    • http://xn--j1aii.su/userfiles/file/loregasobiberuwak.pdfIn PDF document text
    • http://china-engine.net/ckfinder/userfiles/files/vixigajufazak.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_off0000e121.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE121 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f933.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF933 18236 bytes
SHA-256: c8c5b6398356bd306dac03fceccbbbbbfecaff39cee80f3a06c882551f3d6cb1
font_02_sfnt_off000128c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x128C4 10680 bytes
SHA-256: 8a1e2166affa7c529b8e85311b50afe4b32257329cc9044c2ebde1da79f0f52b

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