Malicious PDF — malware analysis report

Static analysis result for SHA-256 fb95d98ce49e6883…

MALICIOUS

PDF

45.2 KB Created: 2021-05-13 02:04:38 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-07
MD5: d2eda0f9cad6c25d64106c3121fd9c96 SHA-1: d8536f61acb6873d0b5c37b720cc103f953c8cd9 SHA-256: fb95d98ce49e6883f6772dba3b347ede6c15025c543ee00822c4a8d827734c7e
82 Risk Score

Malware Insights

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

This PDF document contains multiple links that redirect to websites offering game hacks and generators, such as 'free robux'. The heuristic 'PDF_GAME_HACK_REDIRECT_LURE' indicates these links are designed to entice users to click, likely leading to malicious content or further downloads. The ML classifier also flagged this PDF as malicious with high confidence.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9621

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.xyz/app/431946152/roblox-zone-free-robux-game-hack PDF link annotation
    • https://ethraa-sys.com/userfiles/files/free-robux-without-verification-or-survey_GM431946152.pdfIn PDF document text
    • https://ethraa-sys.com/userfiles/files/coin-master-hack-2021-ios_GM406889139.pdfIn PDF document text
    • https://ethraa-sys.com/userfiles/files/get-robux-today_GM431946152.pdfIn PDF document text
    • https://ethraa-sys.com/userfiles/files/roblox-script-hack_GM431946152.pdfIn PDF document text
    • https://ethraa-sys.com/userfiles/files/easy-robux-com_GM431946152.pdfIn PDF document text
    • https://ethraa-sys.com/userfiles/files/how-to-get-minecraft-windows-10-for-free_GM479516143.pdfIn PDF document text
    • https://ethraa-sys.com/userfiles/files/coin-master-apk-free-download_GM406889139.pdfIn PDF document text
    • https://ethraa-sys.com/userfiles/files/google-play-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • https://ethraa-sys.com/userfiles/files/free-coin-and-spin-in-coin-master_GM406889139.pdfIn PDF document text
    • https://ethraa-sys.com/userfiles/files/free-spins-coin-master-app-ios_GM406889139.pdfIn PDF document text
    • https://ethraa-sys.com/userfiles/files/claim-free-robux_GM431946152.pdfIn PDF document text
    • https://ethraa-sys.com/userfiles/files/roblox-free-play_GM431946152.pdfIn PDF document text
    • https://ethraa-sys.com/userfiles/files/free-spins-and-coins-coin-master-2021-link_GM406889139.pdfIn PDF document text
    • https://ethraa-sys.com/userfiles/files/coin-master-hack-apk-2021_GM406889139.pdfIn PDF document text
    • https://ethraa-sys.com/userfiles/files/free-spins-coin-master-app_GM406889139.pdfIn PDF document text
    • https://ethraa-sys.com/userfiles/files/microsoft-bing-free-robux_GM431946152.pdfIn PDF document text
    • https://ethraa-sys.com/userfiles/files/body-roblox_GM431946152.pdfIn PDF document text
    • https://ethraa-sys.com/userfiles/files/free-spins-coin-master-unlimited_GM406889139.pdfIn PDF document text
    • https://ethraa-sys.com/userfiles/files/how-to-get-minecraft-for-free-on-android-device_GM479516143.pdfIn PDF document text
    • https://ethraa-sys.com/userfiles/files/coin-master-free-spin-links-december-30-2021_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004957.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4957 26568 bytes
SHA-256: ae199162c64d76bb0602dee8853b6ec7037690bac54e9ca4f97022c84942e0e1
font_01_sfnt_off000084b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x84B0 2844 bytes
SHA-256: baad2f3f6808f4af03fa9398e38c580c8d846f7f773a947d8cc1f39b2753d31a
font_02_sfnt_off00008e72.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8E72 18180 bytes
SHA-256: fa0bfd9229dff732b79349aec0b82eb394b94074e398d1bd7575aad3963e16a1

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