Malicious PDF — malware analysis report

Static analysis result for SHA-256 eb55e43d6d1cc79c…

MALICIOUS

PDF

52.3 KB Created: 2021-06-09 07:15:03 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-07
MD5: c5c9d94bd9238d2bc5abb92b935e74ae SHA-1: 9da284c461fc6f453faa12a67228b192d611a8ed SHA-256: eb55e43d6d1cc79cb53923494f4aec5feb2e94ef11f78c76c14bdff618892126
122 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to websites offering game cheats and hacks, such as 'free robux codes generator'. The heuristic 'SE_CLIPBOARD_COMMAND_LURE' indicates the document likely instructs the user to copy and paste content into a command-line interface, suggesting an attempt to execute malicious code. The ML classifier also flagged the PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9657

Heuristics 5

  • 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.
  • Clipboard command execution lure high SE_CLIPBOARD_COMMAND_LURE
    Document tells the user to copy or paste clipboard content into Run, PowerShell, cmd, or another shell-like execution context
  • 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/roblox-cube-defence-cheat-game-hack PDF link annotation
    • https://e-learning-ma-nurussaadah.com/__statics/gudangsoal/files/free-minecraft-codes-2021_GM479516143.pdfIn PDF document text
    • https://e-learning-ma-nurussaadah.com/__statics/gudangsoal/files/coin-master-apk-mod_GM406889139.pdfIn PDF document text
    • https://e-learning-ma-nurussaadah.com/__statics/gudangsoal/files/free-robux-codes-generator-no-verification_GM431946152.pdfIn PDF document text
    • https://e-learning-ma-nurussaadah.com/__statics/gudangsoal/files/all-coin-master-spin-link-and-free-download_GM406889139.pdfIn PDF document text
    • https://e-learning-ma-nurussaadah.com/__statics/gudangsoal/files/how-to-get-stuff-that-cost-coins-free-mpe-master_GM406889139.pdfIn PDF document text
    • https://e-learning-ma-nurussaadah.com/__statics/gudangsoal/files/links-for-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • https://e-learning-ma-nurussaadah.com/__statics/gudangsoal/files/coin-master-hack-pro-gamers_GM406889139.pdfIn PDF document text
    • https://e-learning-ma-nurussaadah.com/__statics/gudangsoal/files/114-4-hacks_GM479516143.pdfIn PDF document text
    • https://e-learning-ma-nurussaadah.com/__statics/gudangsoal/files/legit-coin-master-hack_GM406889139.pdfIn PDF document text
    • https://e-learning-ma-nurussaadah.com/__statics/gudangsoal/files/hack-roblox-players_GM431946152.pdfIn PDF document text
    • https://e-learning-ma-nurussaadah.com/__statics/gudangsoal/files/can-you-actually-get-free-robux_GM431946152.pdfIn PDF document text
    • https://e-learning-ma-nurussaadah.com/__statics/gudangsoal/files/roblox-free-accessories_GM431946152.pdfIn PDF document text
    • https://e-learning-ma-nurussaadah.com/__statics/gudangsoal/files/free-robux-without-human-verification_GM431946152.pdfIn PDF document text
    • https://e-learning-ma-nurussaadah.com/__statics/gudangsoal/files/free-coin-and-spin-link_GM406889139.pdfIn PDF document text
    • https://e-learning-ma-nurussaadah.com/__statics/gudangsoal/files/roblox-robux-hack_GM431946152.pdfIn PDF document text
    • https://e-learning-ma-nurussaadah.com/__statics/gudangsoal/files/free-robux-app_GM431946152.pdfIn PDF document text
    • https://e-learning-ma-nurussaadah.com/__statics/gudangsoal/files/free-spins-coin-master-android_GM406889139.pdfIn PDF document text
    • https://e-learning-ma-nurussaadah.com/__statics/gudangsoal/files/how-to-start-a-minecraft-server-for-free_GM479516143.pdfIn PDF document text
    • https://e-learning-ma-nurussaadah.com/__statics/gudangsoal/files/coin-master-unlimited-spin-link_GM406889139.pdfIn PDF document text
    • https://e-learning-ma-nurussaadah.com/__statics/gudangsoal/files/roblox-games-free_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000528f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x528F 26492 bytes
SHA-256: ebb386aadc96494e56a017ef9f0516ab8fa29554e9c43f705ce04dd568e0b5c9
font_01_sfnt_off00008f0e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8F0E 3884 bytes
SHA-256: 40b61f8938bd710dc29dc58ba3fde91c245a6a69596ec569b4d27c769ca417cf
font_02_sfnt_off00009bb1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9BB1 5696 bytes
SHA-256: 450e3ee45915afe13702bf1d587eb8b9ad88a8d2113419ac9f2fd116a828e139
font_03_sfnt_off0000a8c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA8C3 18588 bytes
SHA-256: 83c9d49f5779fcae914593c9d3d23d27eee715b95f27e8f5e1fb677f70aeaae8

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