Malicious PDF — malware analysis report

Static analysis result for SHA-256 3884bdb400fd73c7…

MALICIOUS

PDF

41.5 KB Created: 2021-05-15 04:35:01 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 66c535f883a464b607d9425c1e352712 SHA-1: a4e76fc7d25f90059f9d114579bcb5dc0e644944 SHA-256: 3884bdb400fd73c7d19a96ba01407287de8ddb5bed6095cfd82ca089eb554ecf
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The document presents a fake CAPTCHA or human verification prompt, a common lure to trick users into clicking malicious links. The primary malicious URL identified, https://netcdn.xyz/app/406889139/coins-master-game-hack, likely serves as a download source for a secondary payload. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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/406889139/coins-master-game-hack
    • http://pjj.mtsntpi.my.id/__statics/gudangsoal/files/is-minecraft-free-on-xbox-one_GM479516143.pdf
    • http://pjj.mtsntpi.my.id/__statics/gudangsoal/files/free-minecraft-java-account_GM479516143.pdf
    • http://pjj.mtsntpi.my.id/__statics/gudangsoal/files/coin-master-heaven-daily-free-spins-link-today_GM406889139.pdf
    • http://pjj.mtsntpi.my.id/__statics/gudangsoal/files/free-vip-server-roblox_GM431946152.pdf
    • http://pjj.mtsntpi.my.id/__statics/gudangsoal/files/how-to-get-free-coins-in-coin-master-game_GM406889139.pdf
    • http://pjj.mtsntpi.my.id/__statics/gudangsoal/files/cpbildco-robux_GM431946152.pdf
    • http://pjj.mtsntpi.my.id/__statics/gudangsoal/files/coin-master-heaven-daily-free-spins_GM406889139.pdf
    • http://pjj.mtsntpi.my.id/__statics/gudangsoal/files/minecraft-free-minecoins_GM479516143.pdf
    • http://pjj.mtsntpi.my.id/__statics/gudangsoal/files/free-money-links-coin-master_GM406889139.pdf
    • http://pjj.mtsntpi.my.id/__statics/gudangsoal/files/free-robux-hack_GM431946152.pdf
    • http://pjj.mtsntpi.my.id/__statics/gudangsoal/files/free-coin-master-spins-and-coins_GM406889139.pdf
    • http://pjj.mtsntpi.my.id/__statics/gudangsoal/files/how-to-gift-robux-on-mobile_GM431946152.pdf
    • http://pjj.mtsntpi.my.id/__statics/gudangsoal/files/how-to-cheat-in-roblox_GM431946152.pdf
    • http://pjj.mtsntpi.my.id/__statics/gudangsoal/files/coin-master-daily-spin-link_GM406889139.pdf
    • http://pjj.mtsntpi.my.id/__statics/gudangsoal/files/free-robux-pin-codes_GM431946152.pdf
    • http://pjj.mtsntpi.my.id/__statics/gudangsoal/files/daily-free-spins-on-coin-master_GM406889139.pdf
    • http://pjj.mtsntpi.my.id/__statics/gudangsoal/files/minecraft-java-for-free_GM479516143.pdf
    • http://pjj.mtsntpi.my.id/__statics/gudangsoal/files/minecraft-on-computer-free_GM479516143.pdf
    • http://pjj.mtsntpi.my.id/__statics/gudangsoal/files/minecraft-pocket-edition-free-download_GM479516143.pdf
    • http://pjj.mtsntpi.my.id/__statics/gudangsoal/files/coin-master-heaven-free-spins-and-coins_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off000048d8.bin
fb6c78a59a5222a35e038e1e36d209962d6b4c79e3ab4288bb4063e093107492		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x48D8 24984 bytes
font_01_sfnt_off000081dd.bin
c9bcf992f56036f7990d1d97856b1a720a277248fb627b4b4849cf1459fc1402		 pdf-font-stream PDF embedded font (sfnt) at offset 0x81DD 17544 bytes

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