Malicious PDF — malware analysis report

Static analysis result for SHA-256 5d53865f3b19150c…

MALICIOUS

PDF

34.3 KB Created: 2021-07-03 20:33:34 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: c56c2c98f508a04bce69ebc75fbffa0c SHA-1: 8d83dc8d8e4aa144f5bf74243585cfcd5be4da85 SHA-256: 5d53865f3b19150c1f02156dd8f606bd81ee5c7a724bf18c0aea76581df429d3
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The document presents itself as a "Coin Master Hack" and contains numerous links to external resources, including one at http://netcdn.tw/app/406889139/coin-master-hack-2021-game-hack, suggesting it's a lure for downloading malware or engaging in phishing. The heuristic for a password-protected archive handoff further indicates a potential attempt to bypass security controls by providing a password for an encrypted payload. No scripts were extracted, but the embedded URLs and the overall theme point to a malware distribution or phishing campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 4

  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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 http://netcdn.tw/app/406889139/coin-master-hack-2021-game-hack
    • http://library.umuslim.ac.id/repository/free-spin-coin-master-twitter_GM406889139.pdf
    • http://library.umuslim.ac.id/repository/bloxpink-free-robux_GM431946152.pdf
    • http://library.umuslim.ac.id/repository/coin-master-cards-hack_GM406889139.pdf
    • http://library.umuslim.ac.id/repository/free-unlimited-robux-2021_GM431946152.pdf
    • http://library.umuslim.ac.id/repository/pokemon-go-free-remote-raid-pass-march-2021_GM1094591345.pdf
    • http://library.umuslim.ac.id//repository/coin-master-hack-2021-no-survey_GM406889139.pdf
    • http://library.umuslim.ac.id/repository/roblox-hacks-phantom-forces-2021_GM431946152.pdf
    • http://library.umuslim.ac.id/repository/roblox-dragon-ball-final-stand-hack-script_GM431946152.pdf
    • http://library.umuslim.ac.id/repository/coin-master-link-daily-get-free-spins-and-coins_GM406889139.pdf
    • http://library.umuslim.ac.id/repository/how-to-hack-a-minecraft-server-and-make-yourself-op_GM479516143.pdf
    • http://library.umuslim.ac.id/repository/how-to-get-free-robux-without-any-verification_GM431946152.pdf
    • http://library.umuslim.ac.id/repository/roblox-twisted-murderer-free-credits-givaway_GM431946152.pdf
    • http://library.umuslim.ac.id/repository/how-to-hack-step-by-step-password-pictures-roblox_GM431946152.pdf
    • http://library.umuslim.ac.id/repository/coin-master-hack-spins-and-coins-unlimited-free-download_GM406889139.pdf
    • http://library.umuslim.ac.id/repository/can-you-still-get-minecraft-windows-10-for-free_GM479516143.pdf
    • http://library.umuslim.ac.id/repository/roblox-how-to-get-any-ingame-tool-hack_GM431946152.pdf
    • http://library.umuslim.ac.id/repository/robux-hack-free-robux_GM431946152.pdf
    • http://library.umuslim.ac.id//repository/daily-coin-master-link_GM406889139.pdf
    • http://library.umuslim.ac.id//repository/mcpe-master-coins-hack-download_GM406889139.pdf
    • http://library.umuslim.ac.id/repository/how-to-get-roebucks_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_002_off000030da.bin
e7eca84ee203cc326b72033b78c6d3c7068571dae00a82b9d589ec369951353c		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x30DA 22440 bytes
font_01_sfnt_off000062bd.bin
8438728008f6ab05b5c9a65d4eeb1f2e5c23a436eadc11c6e76328f72b7d7fb7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x62BD 18408 bytes

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