Malicious PDF — malware analysis report

Static analysis result for SHA-256 0ba4a2c358f72cd7…

MALICIOUS

PDF

42.4 KB Created: 2021-06-03 21:00:08 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 6c5e24ed8480d08885eec482c65dec86 SHA-1: c3115d2e0ac468ed9e976f7ebf8c43ada102cfa6 SHA-256: 0ba4a2c358f72cd71d23dd055fbef3f93e6ca75be2aaa4c37be04faa92dfe369
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. The file routes users through malicious redirector infrastructure and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9874

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector high PDF_GAME_HACK_REDIRECT_LURE
    PDF's clickable action targets a redirector of the form /app/<id>/<slug>-game-hack — the landing-page shape of a large SEO 'free spins / generator / game hack' lure family that funnels victims through rotating disposable hosts to a malware/scam payload. The multi-link variants also trip ML/link-farm rules; this catches the single-link variants that otherwise score clean.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://netcdn.online/app/406889139/coin-master-free-spins-2021-game-hack PDF link annotation
    • https://digilib.stimlog.ac.id/repository/robux-free-gift-card-org-hack_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/free-minecraft-videos_GM479516143.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/free-robux-without-any-verification_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/best-free-robux-sites_GM431946152.pdfIn PDF document text
    • http://digilib.stimlog.ac.id/repository/free-robux-hacks-no-verification_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/coin-master-33-hack-version-download_GM406889139.pdfIn PDF document text
    • http://digilib.stimlog.ac.id/repository/200-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://digilib.stimlog.ac.id/repository/how-to-win-free-robux_GM431946152.pdfIn PDF document text
    • http://digilib.stimlog.ac.id/repository/free-robux-app_GM431946152.pdfIn PDF document text
    • http://digilib.stimlog.ac.id/repository/minecraft-free-ios-2021_GM479516143.pdfIn PDF document text
    • http://digilib.stimlog.ac.id/repository/generator-robux_GM431946152.pdfIn PDF document text
    • http://digilib.stimlog.ac.id/repository/minecraft-windows-10-free-trial_GM479516143.pdfIn PDF document text
    • http://digilib.stimlog.ac.id/repository/free-2021-robux_GM431946152.pdfIn PDF document text
    • http://digilib.stimlog.ac.id/repository/free-spin-app-coin-master_GM406889139.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/how-to-get-unlimited-robux_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/daily-free-spin-coin-master-link_GM406889139.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/best-free-minecraft-servers_GM479516143.pdfIn PDF document text
    • http://digilib.stimlog.ac.id/repository/roblox-fun-com-free-robux_GM431946152.pdfIn PDF document text
    • http://digilib.stimlog.ac.id/repository/roblox-hack-apk_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/coin-master-hacks-no-human-verification_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00004cfa.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4CFA 24104 bytes
SHA-256: 0198d0b8692a2e7a7f240e1ebe24babb207c0b61999863993ba03f56b2a5f281
font_01_sfnt_off000082d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x82D6 18288 bytes
SHA-256: 9f7609fba99e53c6baa99bb04d1c7e3f9b7167131c1520eb2a413cdab4a14871

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