Malicious PDF — malware analysis report

Static analysis result for SHA-256 90132fd7cec5d847…

MALICIOUS

PDF

42.2 KB Created: 2021-05-13 12:33:46 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: fc46baa92a582677c9fbabff22fc119f SHA-1: c92f40bba72e827afb6404acd1e7976221b71a8d SHA-256: 90132fd7cec5d8479eef367cd43a32d3966f684da6d35c3557c109cdc14e85b0
82 Risk Score

Malware Insights

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

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 flagged this PDF as malicious, indicating a high likelihood of malicious intent. The document's content and embedded links suggest a social engineering attack aimed at tricking users into downloading further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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.xyz/app/406889139/hackear-coin-master-sin-verificacion-game-hack
    • https://www.sd-olimp.hr/files/juego-hackeado-de-coin-master_GM406889139.pdf
    • http://sd-olimp.hr/files/free-links-for-coin-master_GM406889139.pdf
    • https://www.sd-olimp.hr/files/whats-robux_GM431946152.pdf
    • https://www.sd-olimp.hr/files/coin-game_GM406889139.pdf
    • http://sd-olimp.hr/files/coin-master-free-spin-and-coins-fbid-links_GM406889139.pdf
    • http://sd-olimp.hr/files/free-roblox-gift-card-codes-2021-unused_GM431946152.pdf
    • http://sd-olimp.hr/files/free-robux-mod_GM431946152.pdf
    • https://www.sd-olimp.hr/files/roblox-hack-download-pc_GM431946152.pdf
    • https://www.sd-olimp.hr/files/coin-master-hacked-apk-download-for-android_GM406889139.pdf
    • https://www.sd-olimp.hr/files/to-get-free-robux_GM431946152.pdf
    • http://sd-olimp.hr/files/free-robux-without-verification-or-survey_GM431946152.pdf
    • https://www.sd-olimp.hr/files/can-i-get-robux-for-free_GM431946152.pdf
    • http://sd-olimp.hr/files/free-robux-codes-generator-no-verification_GM431946152.pdf
    • http://sd-olimp.hr/files/link-coin-master_GM406889139.pdf
    • https://www.sd-olimp.hr/files/coin-master-cheat-engine-hack_GM406889139.pdf
    • https://www.sd-olimp.hr/files/roblox-free-clothes-hack_GM431946152.pdf
    • https://www.sd-olimp.hr/files/inappropriate-roblox_GM431946152.pdf
    • http://sd-olimp.hr/files/coin-master-hack-version-2021-download_GM406889139.pdf
    • http://sd-olimp.hr/files/spin-coin-master-free_GM406889139.pdf
    • http://sd-olimp.hr/files/how-to-hack-mcpe-master-coins_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004ad1.bin
9de5ac9d2e78949ce425fd34337bc30d17c6c7143ea234984b5c33b23fae94f4		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4AD1 24740 bytes
font_01_sfnt_off000083a6.bin
0a8f59b95944f0c37e1e8bd09bffc7e8086f34ba5aab4310990f1b5d227b6c8b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x83A6 17848 bytes

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