Malicious PDF — malware analysis report

Static analysis result for SHA-256 0aa96af93144a6ef…

MALICIOUS

PDF

45.7 KB Created: 2021-06-11 03:51:32 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 3c1021494424182ddfdfdcc65d3f8782 SHA-1: e74016fbc7cf654b858f36f926ad75ad6b36892f SHA-256: 0aa96af93144a6ef84dd34c2b48fe8e1db6cfb8d287a305d052c4cac4f8429f3
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF document contains a fake CAPTCHA lure, designed to trick users into interacting with the document. It also embeds external URLs, one of which is directly linked to a potential download. The ML classifier strongly indicates maliciousness, suggesting the document is part of a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9864

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.tw/app/431946152/roblox-mad-city-cheat-codes-website-game-hack
    • https://morishita-tc.com.tw/image/data/files/apps-for-free-robux_GM431946152.pdf
    • https://morishita-tc.com.tw/image/data/files/free-robux-not-fake_GM431946152.pdf
    • https://morishita-tc.com.tw/image/data/files/redeem-roblox-card-free_GM431946152.pdf
    • https://morishita-tc.com.tw/image/data/files/minecraft-cheat-client_GM479516143.pdf
    • https://morishita-tc.com.tw/image/data/files/how-to-hack-peoples-roblox-accounts_GM431946152.pdf
    • https://morishita-tc.com.tw/image/data/files/how-to-hack-roblox-to-get-robux_GM431946152.pdf
    • https://morishita-tc.com.tw/image/data/files/moonactive-coin-master-free-spins_GM406889139.pdf
    • https://morishita-tc.com.tw/image/data/files/tiradas-coin-master_GM406889139.pdf
    • https://morishita-tc.com.tw/image/data/files/roblox-promo-codes-free-robux_GM431946152.pdf
    • https://morishita-tc.com.tw/image/data/files/coin-master-hack-without-verification-code_GM406889139.pdf
    • https://morishita-tc.com.tw/image/data/files/coin-master-free-spins-through-coin-pop_GM406889139.pdf
    • https://morishita-tc.com.tw/image/data/files/minecraft-pocket-edition-free-apk_GM479516143.pdf
    • https://morishita-tc.com.tw/image/data/files/how-to-get-minecraft-bedrock-edition-on-pc-for-free_GM479516143.pdf
    • https://morishita-tc.com.tw/image/data/files/coin-master-hack-with-facebook-login_GM406889139.pdf
    • https://morishita-tc.com.tw/image/data/files/roblox-robux-generator-2021_GM431946152.pdf
    • https://morishita-tc.com.tw/image/data/files/coin-master-hack-app-download-free_GM406889139.pdf
    • https://morishita-tc.com.tw/image/data/files/minecraft-java-code-free_GM479516143.pdf
    • https://morishita-tc.com.tw/image/data/files/free-robux-no-human-verification-and-no-survey_GM431946152.pdf
    • https://morishita-tc.com.tw/image/data/files/minecraft-windows-10-hacks_GM479516143.pdf
    • https://morishita-tc.com.tw/image/data/files/how-to-get-minecraft-for-free-on-nintendo-switch_GM479516143.pdf
    • https://robuxhaxs.com
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off0000511b.bin
79ba7e475f9fefe0ffaf7978b54e0412d47d23106cc2c6ef88a85abf0d944580		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x511B 27032 bytes
font_01_sfnt_off00008d81.bin
35755e90becc7587272556be65ffc7fab5ec417c87c0b318661762345955e13c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8D81 19152 bytes

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