Malicious PDF — malware analysis report

Static analysis result for SHA-256 98e3c43fff8acd8d…

MALICIOUS

PDF

43.6 KB Created: 2021-06-04 00:33:52 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-12
MD5: db4bdb456f891b62c21533ed6fb3c162 SHA-1: 2ed275cc23b0e2741926096f25c4584d7b4a5e8a SHA-256: 98e3c43fff8acd8d44bdf67020c91344f4733cb19ef4433b190032c9f026d229
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to known malicious redirectors, disguised as download buttons for game hacks and currency generators. The primary malicious URL identified is https://netcdn.online/app/406889139/coin-coin-master-hack-game-hack. The document body and embedded links strongly suggest a social engineering lure to trick users into visiting potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector critical 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. CRITICAL on its own: the /app/<id>/<slug>-game-hack path shape is unambiguous scam infra, and the host rotates so a host-list match can't be relied on.
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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
  • 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-coin-master-hack-game-hack In PDF document text
    • http://pustaka-smpn3tpi.com/repository/free-robux-hacks-no-verification_GM431946152.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com/repository/roblox-hack-me-robux_GM431946152.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com/repository/claimrobux-net_GM431946152.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com/repository/pixies-gigantic-coin-master-free-spins-and-coins_GM406889139.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com//repository/roblox-hack-ios_GM431946152.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com/repository/coin-master-game-download-free_GM406889139.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com/repository/coin-master-latest-mod-apk-free-download_GM406889139.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com/repository/is-minecraft-java-free_GM479516143.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com/repository/earn-robux-sites_GM431946152.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com/repository/coin-master-daily-free-spin-app_GM406889139.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com/repository/how-to-hack-roblox-accounts-passwords_GM431946152.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com/repository/how-to-get-minecraft-for-free-on-tablet_GM479516143.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com//repository/coin-master-free-spins-link-2021_GM406889139.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com//repository/free-robux-not-a-scam_GM431946152.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com//repository/get-free-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com//repository/get-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com/repository/roblox-moderators_GM431946152.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com/repository/how-can-you-get-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com//repository/how-to-get-free-skins-in-roblox_GM431946152.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_off00005106.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5106 24800 bytes
SHA-256: df14de20c604c854f8900038940275c040ee43baa7f0a8d21d1ad5e124627d68
font_01_sfnt_off00008999.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8999 17716 bytes
SHA-256: c15a8689411d8cca9ab0759ab4c496fe9b4353d676dd738e300719e9588112ed

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