Malicious PDF — malware analysis report

Static analysis result for SHA-256 9f625fc3f79b6f87…

MALICIOUS

PDF

43.6 KB Created: 2021-05-13 19:40:52 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 35ff493a919f5e557a09d5a9b75c3c7a SHA-1: e2e195099b40badc51dd2bfef46201d9e6736e23 SHA-256: 9f625fc3f79b6f87c4eff4310e318371e0c3c4abc17466d2a5f5425f3157e828
142 Risk Score

Malware Insights

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

The document presents a fake CAPTCHA and requests sensitive recovery secrets, indicating a social engineering attempt to trick the user into downloading further malicious content. The embedded URL and numerous other URLs point to potential download locations for malware disguised as game hacks or cheats. The ML classifier also strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9969

Heuristics 5

  • Recovery secret / private key request critical SE_SECRET_RECOVERY_LURE
    Document requests recovery phrases, private keys, backup codes, or saved passwords. Requests for these secrets in a document are high-risk.
  • 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/ways-to-get-free-robux-game-hack
    • http://www.pspmrsmkkb.com/webopac/repository/roblox-april-fools-hack_GM431946152.pdf
    • http://www.pspmrsmkkb.com/webopac/repository/free-spins-coin-master-hack-2021_GM406889139.pdf
    • http://www.pspmrsmkkb.com/webopac/repository/free-spins-generated-from-coin-master_GM406889139.pdf
    • http://www.pspmrsmkkb.com/webopac/repository/coin-master-hack-app_GM406889139.pdf
    • http://www.pspmrsmkkb.com/webopac/repository/free-minecraft-windows-10-account_GM479516143.pdf
    • http://www.pspmrsmkkb.com/webopac/repository/roblox-hack-apk_GM431946152.pdf
    • http://www.pspmrsmkkb.com/webopac/repository/coin-master-free-spin-now_GM406889139.pdf
    • http://www.pspmrsmkkb.com/webopac/repository/minecraft-games-online-free-no-download_GM479516143.pdf
    • http://www.pspmrsmkkb.com/webopac/repository/minecraft-java-account-free_GM479516143.pdf
    • http://www.pspmrsmkkb.com/webopac/repository/minecraft-bedrock-edition-pc-free_GM479516143.pdf
    • http://www.pspmrsmkkb.com/webopac/repository/free-spin-and-coin-blogspot-com_GM406889139.pdf
    • http://www.pspmrsmkkb.com/webopac/repository/minecraft-building-hacks_GM479516143.pdf
    • http://www.pspmrsmkkb.com/webopac/repository/coin-master-free-coins-and-spins-daily_GM406889139.pdf
    • http://www.pspmrsmkkb.com/webopac/repository/minecraft-java-free-download_GM479516143.pdf
    • http://www.pspmrsmkkb.com/webopac/repository/coin-master-free-coins-and-spins-app_GM406889139.pdf
    • http://www.pspmrsmkkb.com/webopac/repository/how-to-hack-roblox-accounts-2021_GM431946152.pdf
    • http://www.pspmrsmkkb.com/webopac/repository/free-spin-today-coin-master_GM406889139.pdf
    • http://www.pspmrsmkkb.com/webopac/repository/free-robux-without-any-verification_GM431946152.pdf
    • http://www.pspmrsmkkb.com/webopac/repository/hack-the-game-coin-master_GM406889139.pdf
    • http://www.pspmrsmkkb.com/webopac/repository/roblox-dominus-free_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004b78.bin
8206cc72bb4245e25c29b864721d362f68878e8e7df367cac9164ee49ac707cf		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4B78 25624 bytes
font_01_sfnt_off0000867f.bin
b2cd5ec598a8c260812e966e9710fb38f03066217a6d0ec8f431d8a9dca8af42		 pdf-font-stream PDF embedded font (sfnt) at offset 0x867F 18724 bytes

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