Malicious PDF — malware analysis report

Static analysis result for SHA-256 4c648cb1301d4b25…

MALICIOUS

PDF

47.0 KB Created: 2021-05-11 09:30:52 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 5913e640938297217689c113f8252ccb SHA-1: 138cacefe22fa0d6bc4f13c636165bd38114707f SHA-256: 4c648cb1301d4b25f96093b5a8bcac92bde1fbaaf666c19fb7475de7df3ed615
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 User Execution: Malicious File

The sample is a PDF that displays a fake CAPTCHA or human verification prompt, luring the user to click a link. The embedded URL and document body text point to downloading game cheats for Roblox and Coin Master. This suggests a social engineering attack to trick users into downloading potentially malicious files.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

Heuristics 4

  • Fake CAPTCHA / human verification prompt high SE_FAKE_CAPTCHA
    Document displays a fake CAPTCHA or human-verification prompt — used to trick users into running commands or pressing keyboard shortcuts
  • 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/free-roblox-gfx-game-hack
    • http://elearning.mithkromasantulungagung.com/__statics/gudangsoal/files/roblox-hack-me-robux_GM431946152.pdf
    • http://elearning.mithkromasantulungagung.com/__statics/gudangsoal/files/get-free-coins-on-coin-master_GM406889139.pdf
    • http://elearning.mithkromasantulungagung.com/__statics/gudangsoal/files/hack-coin-master-for-android_GM406889139.pdf
    • http://elearning.mithkromasantulungagung.com/__statics/gudangsoal/files/can-you-hack-coin-master_GM406889139.pdf
    • http://elearning.mithkromasantulungagung.com/__statics/gudangsoal/files/coin-master-game-free_GM406889139.pdf
    • http://elearning.mithkromasantulungagung.com/__statics/gudangsoal/files/master-coin-free-spin-daily_GM406889139.pdf
    • http://elearning.mithkromasantulungagung.com/__statics/gudangsoal/files/spin-coin_GM406889139.pdf
    • http://elearning.mithkromasantulungagung.com/__statics/gudangsoal/files/free-robux-codes-2021_GM431946152.pdf
    • http://elearning.mithkromasantulungagung.com/__statics/gudangsoal/files/safe-hack-for-coin-master-android_GM406889139.pdf
    • http://elearning.mithkromasantulungagung.com/__statics/gudangsoal/files/how-do-you-get-free-robux_GM431946152.pdf
    • http://elearning.mithkromasantulungagung.com/__statics/gudangsoal/files/robux-com-free_GM431946152.pdf
    • http://elearning.mithkromasantulungagung.com/__statics/gudangsoal/files/free-hacks-for-coin-master_GM406889139.pdf
    • http://elearning.mithkromasantulungagung.com/__statics/gudangsoal/files/coin-master-free-spins-2-5-2021_GM406889139.pdf
    • http://elearning.mithkromasantulungagung.com/__statics/gudangsoal/files/tiradas-coin-master_GM406889139.pdf
    • http://elearning.mithkromasantulungagung.com/__statics/gudangsoal/files/coin-master-new-link-free-spin_GM406889139.pdf
    • http://elearning.mithkromasantulungagung.com/__statics/gudangsoal/files/minecraft-pe-apk-free-download_GM479516143.pdf
    • http://elearning.mithkromasantulungagung.com/__statics/gudangsoal/files/how-do-we-get-free-robux_GM431946152.pdf
    • http://elearning.mithkromasantulungagung.com/__statics/gudangsoal/files/how-to-get-free-spins-on-coin-master-2021_GM406889139.pdf
    • http://elearning.mithkromasantulungagung.com/__statics/gudangsoal/files/how-to-hack-roblox-to-get-robux_GM431946152.pdf
    • http://elearning.mithkromasantulungagung.com/__statics/gudangsoal/files/roblox-avatar-girl_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004c12.bin
1490aa636fef6438a48afc839de81a9478eacf3445c0f2b711f97ef00256f7ad		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4C12 32952 bytes
font_01_sfnt_off000096c9.bin
edf37cea4d9572b79aff99b5f3e3e51e81091579a2693570fa47b81a4934fab1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x96C9 17948 bytes

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