Malicious PDF — malware analysis report

Static analysis result for SHA-256 8e561d8428f6c7d5…

MALICIOUS

PDF

46.3 KB Created: 2021-05-15 12:44:40 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 95582aa485f1634227ae0926e8c967c0 SHA-1: 366680d845bde292de1b8c8ee3e0dcffeb30bd99 SHA-256: 8e561d8428f6c7d52fb69289a636dc9000b44557b34f8b650ea7258e8ac85d82
82 Risk Score

Malware Insights

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

The PDF document contains a fake CAPTCHA lure, aiming to trick the user into downloading a potentially malicious application from the provided URL. The ML classifier also flagged this PDF as malicious. The document body and embedded links suggest a scam related to game cheats or free in-game currency.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8696

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/coin-master-free-spins-apk-game-hack
    • https://avn.kz/images/how-to-get-minecraft-for-free-on-mobile_GM479516143.pdf
    • https://avn.kz/images/unlimited-coin-master-free-spins_GM406889139.pdf
    • https://avn.kz/images/june-29-coin-master-hack-no-human-verification_GM406889139.pdf
    • https://avn.kz/images/coin-master-free-spins-hack_GM406889139.pdf
    • https://avn.kz/images/mcpe-optifine_GM479516143.pdf
    • https://avn.kz/images/coin-master-pet-food-hack_GM406889139.pdf
    • https://avn.kz/images/roblox-free-vip-server_GM431946152.pdf
    • https://avn.kz/images/minecraft-java-for-free_GM479516143.pdf
    • https://avn.kz/images/roblox-help-free-robux_GM431946152.pdf
    • https://avn.kz/images/get-free-robux-generator_GM431946152.pdf
    • https://avn.kz/images/coin-master-club-hack_GM406889139.pdf
    • https://avn.kz/images/como-hackear-coin-master-2021_GM406889139.pdf
    • https://avn.kz/images/coin-master-daily-free-spins-link-blogspot_GM406889139.pdf
    • https://avn.kz/images/roblox-apocalypse-rising-hack_GM431946152.pdf
    • https://avn.kz/images/20-free-spin-link-coin-master_GM406889139.pdf
    • https://avn.kz/images/daily-free-spin-coin-master-link_GM406889139.pdf
    • https://avn.kz/images/coin-master-spin-ml_GM406889139.pdf
    • https://avn.kz/images/free-spins-october-28-2021-coin-master_GM406889139.pdf
    • https://avn.kz/images/minecraft-tower-defense-hacked_GM479516143.pdf
    • https://avn.kz/images/roblox-hack-codes_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004932.bin
6e48c90dc7152fd9e46c72de1a9b3b1c9db5b08a8ef9e9dba811390e0e107651		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4932 24720 bytes
font_01_sfnt_off0000812e.bin
d811e0aca85f3b94c42cd1240eec68b8eb378f3d8be5e408d3f6abd0f11f834d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x812E 7332 bytes
font_02_sfnt_off00009346.bin
4a0975cb4ff59b90613a77ae23c76f45b98fe93665a9537e2ed5b6c7d8755f19		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9346 18056 bytes

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