Malicious PDF — malware analysis report

Static analysis result for SHA-256 b4c189c1d0ee4991…

MALICIOUS

PDF

40.8 KB Created: 2021-05-11 13:49:21 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 39d157ae700a0b62d46af483d95ff060 SHA-1: faf67fe39b879e3424cef9a71ef19199e300f97d SHA-256: b4c189c1d0ee4991442ef8c5cc85edeea06deb180dc17a5ede2bca26d8cb50cf
102 Risk Score

Malware Insights

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

The document contains numerous embedded URLs and a primary URL pointing to a 'master-coin-hack-apk' file, indicating a lure for downloading potentially malicious software. The critical heuristic 'SE_SECRET_RECOVERY_LURE' confirms the document's intent to solicit sensitive information such as private keys or recovery phrases, likely to facilitate account compromise or further malicious activity. The ML classifier also strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

Heuristics 4

  • 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.
  • 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/master-coin-hack-apk-game-hack
    • http://ims-77.fr/images/how-to-hack-to-get-robux_GM431946152.pdf
    • http://ims-77.fr/images/earn-free-robux-today_GM431946152.pdf
    • http://ims-77.fr/images/roblox36com-free-robux_GM431946152.pdf
    • http://ims-77.fr/images/free-coins-coin-master-ios_GM406889139.pdf
    • http://ims-77.fr/images/free-robux-no-human-verification-or-survey-2021_GM431946152.pdf
    • http://ims-77.fr/images/gold-cards-coin-master-hack_GM406889139.pdf
    • http://ims-77.fr/images/free-robux-only-1-step_GM431946152.pdf
    • http://ims-77.fr/images/free-coins-and-spins-for-coin-master-game_GM406889139.pdf
    • http://ims-77.fr/images/coin-master-400-spin-link-hack_GM406889139.pdf
    • http://ims-77.fr/images/coin-master-hack-without-verification-code_GM406889139.pdf
    • http://ims-77.fr/images/free-roblox-avatar-ideas_GM431946152.pdf
    • http://ims-77.fr/images/free-spin-coin-master-link-2021_GM406889139.pdf
    • http://ims-77.fr/images/minecraft-pe_GM479516143.pdf
    • http://ims-77.fr/images/real-free-robux-generator_GM431946152.pdf
    • http://ims-77.fr/images/robux-generator-without-human-verification_GM431946152.pdf
    • http://ims-77.fr/images/apps-for-free-robux_GM431946152.pdf
    • http://ims-77.fr/images/www-robux-com_GM431946152.pdf
    • http://ims-77.fr/images/how-to-hack-someones-roblox-account-2021_GM431946152.pdf
    • http://ims-77.fr/images/how-to-get-2021-robux-for-free_GM431946152.pdf
    • http://ims-77.fr/images/minecraft-font-free_GM479516143.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off000045e7.bin
5c4bab741cfb77ce0802cb042a890a47860d071714bdfae324fd33b45ad4fd9d		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x45E7 24676 bytes
font_01_sfnt_off00007dff.bin
41282dcb1c000e988ea8b2199b00347d54e117e16c55148ab4165d720f01bc1d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7DFF 17892 bytes

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