Malicious PDF — malware analysis report

Static analysis result for SHA-256 40dd050f88e102dc…

MALICIOUS

PDF

48.4 KB Created: 2021-06-03 09:22:47 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: f8d5b69367d808efd10d57a7f7c88087 SHA-1: 8191999cce1cea1473e0a2a03ec9283b16a241a4 SHA-256: 40dd050f88e102dcb1682fef6051d157ad1221fcd67a131cb66f001e67eb7efd
102 Risk Score

Malware Insights

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

The document exhibits characteristics of a phishing lure, specifically using a 'Coin Master Free Spins' theme to trick users. It contains a prominent external URI and embedded URLs that likely lead to malicious downloads. The heuristic 'SE_SECRET_RECOVERY_LURE' indicates the document attempts to solicit sensitive information, further reinforcing its malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9796

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.online/app/406889139/coin-master-free-spins-promo-code-game-hack
    • http://balishakirana.com/new/public/ckfinder/userfiles/files/how-to-get-free-robux-on-roblox-2021_GM431946152.pdf
    • http://balishakirana.com/new/public/ckfinder/userfiles/files/is-minecraft-java-free_GM479516143.pdf
    • http://balishakirana.com/new/public/ckfinder/userfiles/files/free-robux-come_GM431946152.pdf
    • http://balishakirana.com/new/public/ckfinder/userfiles/files/free-robux-hacker-us_GM431946152.pdf
    • http://balishakirana.com/new/public/ckfinder/userfiles/files/robux-hack-free-robux_GM431946152.pdf
    • http://balishakirana.com/new/public/ckfinder/userfiles/files/coin-master-free-download-app_GM406889139.pdf
    • http://balishakirana.com/new/public/ckfinder/userfiles/files/coin-master-hack-without-verification-code-2021_GM406889139.pdf
    • http://balishakirana.com/new/public/ckfinder/userfiles/files/coin-master-hack-app-link_GM406889139.pdf
    • http://balishakirana.com/new/public/ckfinder/userfiles/files/daily-coin-master-free-spin-link-facebook_GM406889139.pdf
    • http://balishakirana.com/new/public/ckfinder/userfiles/files/coin-master-free-gifts_GM406889139.pdf
    • http://balishakirana.com/new/public/ckfinder/userfiles/files/minecraft-server-free-trial_GM479516143.pdf
    • http://balishakirana.com/new/public/ckfinder/userfiles/files/free-tiktok-likes-2021_GM835599320.pdf
    • http://balishakirana.com/new/public/ckfinder/userfiles/files/tiktok-free-840-apk_GM835599320.pdf
    • http://balishakirana.com/new/public/ckfinder/userfiles/files/coin-master-free-spins-2021_GM406889139.pdf
    • http://balishakirana.com/new/public/ckfinder/userfiles/files/wahoogaming-co-free-robux_GM431946152.pdf
    • http://balishakirana.com/new/public/ckfinder/userfiles/files/how-to-get-free-robux-hack-2021_GM431946152.pdf
    • http://balishakirana.com/new/public/ckfinder/userfiles/files/free-robux-codes_GM431946152.pdf
    • http://balishakirana.com/new/public/ckfinder/userfiles/files/free-spins-link-in-coin-master-2021_GM406889139.pdf
    • http://balishakirana.com/new/public/ckfinder/userfiles/files/coin-master-free-spins-a2z-help_GM406889139.pdf
    • http://balishakirana.com/new/public/ckfinder/userfiles/files/robux-gift-card-free_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00005223.bin
b4fd88fb467da1192865a0f165cdd2478b536a65405b151e77068365c2f6bc21		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5223 26732 bytes
font_01_sfnt_off0000906f.bin
381f6d859be141449dd645f7be1484d2a1cf49218dc471b402dae69eaa2b11d5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x906F 2824 bytes
font_02_sfnt_off00009a12.bin
dc3ef91c42b56b19e880a129857b9cc4209ff723fc15082788877c1745c42c0a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9A12 18476 bytes

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