Malicious PDF — malware analysis report

Static analysis result for SHA-256 bc3993cd9ccee149…

MALICIOUS

PDF

48.5 KB Created: 2021-06-02 15:43:07 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 1ba8381b8bba2fc2c7753424d54ecf5b SHA-1: 28388b7aca4be697c2b503a1807e5ce120dbc25d SHA-256: bc3993cd9ccee149013f06c461c9f131d4aa7264d4c8d476038fe56cc476d9f8
122 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. It uses a fake-CAPTCHA lure. The file routes users through malicious redirector infrastructure and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9796

Heuristics 5

  • PDF links to a 'free generator / game hack' redirector high PDF_GAME_HACK_REDIRECT_LURE
    PDF's clickable action targets a redirector of the form /app/<id>/<slug>-game-hack — the landing-page shape of a large SEO 'free spins / generator / game hack' lure family that funnels victims through rotating disposable hosts to a malware/scam payload. The multi-link variants also trip ML/link-farm rules; this catches the single-link variants that otherwise score clean.
  • 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/hack-2021-roblox-jailbreak-game-hack PDF link annotation
    • http://interpretation-dessins-enfants.net/images/minecraft-free-download-windows_GM479516143.pdfIn PDF document text
    • http://interpretation-dessins-enfants.net/images/coin-master-hack-lost-world-2021_GM406889139.pdfIn PDF document text
    • http://interpretation-dessins-enfants.net/images/coin-master-free-spins-today-39_GM406889139.pdfIn PDF document text
    • http://interpretation-dessins-enfants.net/images/is-minecraft-free-on-switch_GM479516143.pdfIn PDF document text
    • http://interpretation-dessins-enfants.net/images/coin-master-hack-mod-apk-free-download_GM406889139.pdfIn PDF document text
    • http://interpretation-dessins-enfants.net/images/coin-master-free-attack_GM406889139.pdfIn PDF document text
    • http://interpretation-dessins-enfants.net/images/free-coin-master-spins-and-coins_GM406889139.pdfIn PDF document text
    • http://interpretation-dessins-enfants.net/images/minecraft-server-hacks_GM479516143.pdfIn PDF document text
    • http://interpretation-dessins-enfants.net/images/free-minecraft-shaders_GM479516143.pdfIn PDF document text
    • http://interpretation-dessins-enfants.net/images/adopt-me-roblox-hacks_GM431946152.pdfIn PDF document text
    • http://interpretation-dessins-enfants.net/images/coin-master-tricks-and-hacks_GM406889139.pdfIn PDF document text
    • http://interpretation-dessins-enfants.net/images/coin-master-free-coins-and-spins-2021_GM406889139.pdfIn PDF document text
    • http://interpretation-dessins-enfants.net/images/how-to-get-free-robux-no-survey_GM431946152.pdfIn PDF document text
    • http://interpretation-dessins-enfants.net/images/free-gfx-roblox_GM431946152.pdfIn PDF document text
    • http://interpretation-dessins-enfants.net/images/roblox-avatar-girl_GM431946152.pdfIn PDF document text
    • http://interpretation-dessins-enfants.net/images/free-minecraft-website_GM479516143.pdfIn PDF document text
    • http://interpretation-dessins-enfants.net/images/minecraft-mojang-free_GM479516143.pdfIn PDF document text
    • http://interpretation-dessins-enfants.net/images/how-to-get-free-robux-on-ipad_GM431946152.pdfIn PDF document text
    • http://interpretation-dessins-enfants.net/images/how-to-make-your-own-minecraft-pe-server-for-free_GM479516143.pdfIn PDF document text
    • http://interpretation-dessins-enfants.net/images/how-do-you-get-roebucks_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00004fd8.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4FD8 27960 bytes
SHA-256: 0519aa29927510ede43ee7509d1d5e183bc4a39c116ea59bc0a144ca7f304c0a
font_01_sfnt_off00008f20.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8F20 2880 bytes
SHA-256: 10d025f04f706eb71cdda4f99784df1b9ccb52e48080e43095e0398eaef6f132
font_02_sfnt_off0000990a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x990A 18868 bytes
SHA-256: 28ad2ba9e1e2b01a0cbedd344928793717c7620c7e3491c82d1d48346cb8b8f7

Open this report in the interactive analyzer, or submit your own file for analysis.