Malicious PDF — malware analysis report

Static analysis result for SHA-256 270527ca356a1f50…

MALICIOUS

PDF

44.8 KB Created: 2021-06-03 05:46:03 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: e04c861ce194b82bbe17999d1096f59e SHA-1: 3a249d79dbeed0fdf6e1cd0f52b7dd5446789bbb SHA-256: 270527ca356a1f50c717d4c3c343f53ea1144b7badd25d4eba6879e68270ddc7
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 embedded URL and numerous other URLs point to sites offering hacks or free items, reinforcing the deceptive nature of the document. The ML classifier also flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

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.online/app/431946152/how-to-hack-someone-on-roblox-game-hack
    • https://knowledgekingdom.com.jo/aidata/blanc/files/roblox-login-hack_GM431946152.pdf
    • https://knowledgekingdom.com.jo/aidata/blanc/files/coin-master-free-spins-hack-download_GM406889139.pdf
    • https://knowledgekingdom.com.jo/aidata/blanc/files/can-you-get-minecraft-for-free_GM479516143.pdf
    • https://knowledgekingdom.com.jo/aidata/blanc/files/free-roblox-accounts-2021-with-robux_GM431946152.pdf
    • https://knowledgekingdom.com.jo/aidata/blanc/files/minecraft-pe-texture-packs-free-download_GM479516143.pdf
    • https://knowledgekingdom.com.jo/aidata/blanc/files/daily-coin-master-free-spin-link_GM406889139.pdf
    • https://knowledgekingdom.com.jo/aidata/blanc/files/free-minecraft-codes-2021_GM479516143.pdf
    • https://knowledgekingdom.com.jo/aidata/blanc/files/coin-master-game-hack-app_GM406889139.pdf
    • https://knowledgekingdom.com.jo/aidata/blanc/files/twitter-coin-master-free-spins_GM406889139.pdf
    • https://knowledgekingdom.com.jo/aidata/blanc/files/coin-master-free-spin-whatsapp-group_GM406889139.pdf
    • https://knowledgekingdom.com.jo/aidata/blanc/files/games-that-can-be-hacked_GM431946152.pdf
    • https://knowledgekingdom.com.jo/aidata/blanc/files/moonactive-coin-master-free-spins_GM406889139.pdf
    • https://knowledgekingdom.com.jo/aidata/blanc/files/free-spin-in-coin-master_GM406889139.pdf
    • https://knowledgekingdom.com.jo/aidata/blanc/files/minecraft-hacked-apk_GM479516143.pdf
    • https://knowledgekingdom.com.jo/aidata/blanc/files/minecraft-wurst-hacked-client_GM479516143.pdf
    • https://knowledgekingdom.com.jo/aidata/blanc/files/free-robux-please_GM431946152.pdf
    • https://knowledgekingdom.com.jo/aidata/blanc/files/blox-supply-free-robux_GM431946152.pdf
    • https://knowledgekingdom.com.jo/aidata/blanc/files/coin-master-free-spin-link-today-2021_GM406889139.pdf
    • https://knowledgekingdom.com.jo/aidata/blanc/files/free-coin_GM406889139.pdf
    • https://knowledgekingdom.com.jo/aidata/blanc/files/2021-free-spins-coin-master-link_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off000050dd.bin
e2ee30b9d6700486f34d78f8d7c52fc2d14531adca29d12797ca8e24c771a46b
decompressed-pdf-stream PDF FlateDecoded stream at offset 0x50DD 25352 bytes
font_01_sfnt_off00008b57.bin
eebf4fd0ce8e014a693b7448b6f63c7fd528199174cddc1a90a23252bff1a633
pdf-font-stream PDF embedded font (sfnt) at offset 0x8B57 18608 bytes