Malicious PDF — malware analysis report

Static analysis result for SHA-256 efff3604ca95593b…

MALICIOUS

PDF

47.7 KB Created: 2021-06-11 10:26:22 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 34591540b1eab73c5dd16967b557245a SHA-1: ddfb1ac3416c54289143a49139a8775bd06d27c5 SHA-256: efff3604ca95593b1658dedf5850330d7d41ef79de347a5c4bf8203bc22cda7a
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to external websites that promise game hacks and generators, such as 'free hats on Roblox'. These links are likely intended to redirect users to malicious sites that could host malware or phishing content. The ML classifier also flagged this PDF as malicious with high confidence.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9769

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.tw/app/431946152/free-hats-on-roblox-2021-game-hack PDF link annotation
    • http://mtsn-baranti.com/perpus/repository/roblox-free-no-download_GM431946152.pdfIn PDF document text
    • http://mtsn-baranti.com/perpus/repository/free-unlimited-coin-master-online-tool_GM406889139.pdfIn PDF document text
    • http://mtsn-baranti.com/perpus/repository/how-to-get-minecraft-on-chromebook-for-free_GM479516143.pdfIn PDF document text
    • http://mtsn-baranti.com/perpus/repository/coin-master-hack-app-2021-download_GM406889139.pdfIn PDF document text
    • http://mtsn-baranti.com/perpus/repository/roblox-get-free-robux-every-10-seconds_GM431946152.pdfIn PDF document text
    • http://mtsn-baranti.com/perpus/repository/free-robux-generator-no-verification_GM431946152.pdfIn PDF document text
    • http://mtsn-baranti.com/perpus/repository/roblox-sexually_GM431946152.pdfIn PDF document text
    • http://mtsn-baranti.com/perpus/repository/free-robux-kid-friendly_GM431946152.pdfIn PDF document text
    • http://mtsn-baranti.com/perpus/repository/free-robux-offers_GM431946152.pdfIn PDF document text
    • http://mtsn-baranti.com/perpus/repository/minecraft-switch-free_GM479516143.pdfIn PDF document text
    • http://mtsn-baranti.com/perpus/repository/filtered-roblox-hack_GM431946152.pdfIn PDF document text
    • http://mtsn-baranti.com/perpus/repository/free-robux-no-verify_GM431946152.pdfIn PDF document text
    • http://mtsn-baranti.com/perpus/repository/how-to-hack-hole-in-the-wall-roblox_GM431946152.pdfIn PDF document text
    • http://mtsn-baranti.com/perpus/repository/conor3d-how-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://mtsn-baranti.com/perpus/repository/games-that-give-free-robux_GM431946152.pdfIn PDF document text
    • http://mtsn-baranti.com/perpus/repository/free-spins-for-coin-master-app_GM406889139.pdfIn PDF document text
    • http://mtsn-baranti.com/perpus/repository/coin-master-hack-free-spins_GM406889139.pdfIn PDF document text
    • http://mtsn-baranti.com/perpus/repository/roblox-money-cheat-no-survey_GM431946152.pdfIn PDF document text
    • http://mtsn-baranti.com/perpus/repository/bloxpage-free-robux_GM431946152.pdfIn PDF document text
    • http://mtsn-baranti.com/perpus/repository/isuku-roblox-free-shop-hose_GM431946152.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_004_off00005225.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5225 25504 bytes
SHA-256: ed53af85a59843cea8ae1cb4625ff2d10b17ac671dda378dcf9f6dc037335184
font_01_sfnt_off00008c0c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8C0C 2940 bytes
SHA-256: eb230542719c96b42e3fd8bb01e35f13ebd5f02629049da3a58e7fd7607bf48a
font_02_sfnt_off0000961b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x961B 18684 bytes
SHA-256: a88b2894ab57b187c05df0d8339df91ccbaf410b8a3f84ebf5af09e5ec867f39

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