Malicious PDF — malware analysis report

Static analysis result for SHA-256 1b0b510238bd5cb9…

MALICIOUS

PDF

44.8 KB Created: 2021-05-16 07:07:07 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-05
MD5: b389c28881edb4696196de620fd696aa SHA-1: 3793f7f40676f9f1adc7cb2ec3d9191eb895dac4 SHA-256: 1b0b510238bd5cb9c79433a8362c1a14eccce6196e8a363994a502a71de4d5de
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to websites offering game hacks and free currency, a common lure for phishing and malware distribution. The heuristic 'PDF_GAME_HACK_REDIRECT_LURE' specifically flags this behavior. While no scripts were directly extracted, the document's structure and embedded URLs strongly suggest it's designed to redirect users to malicious sites, likely for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9632

Heuristics 4

  • 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.
  • 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/coin-master-daily-gift-free-spins-and-coins-link-game-hack PDF link annotation
    • http://bemviverclin.com.br/images/free-robux-hack-us_GM431946152.pdfIn PDF document text
    • http://bemviverclin.com.br/images/what-games-on-roblox-give-you-free-robux_GM431946152.pdfIn PDF document text
    • http://bemviverclin.com.br/images/how-to-play-roblox-for-free_GM431946152.pdfIn PDF document text
    • http://bemviverclin.com.br/images/coin-master-daily-spin-link_GM406889139.pdfIn PDF document text
    • http://bemviverclin.com.br/images/minecraft-ore-finder-mod_GM479516143.pdfIn PDF document text
    • http://bemviverclin.com.br/images/minecraft-java-edition-code-free_GM479516143.pdfIn PDF document text
    • http://bemviverclin.com.br/images/get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://bemviverclin.com.br/images/roblox-free-robux-generator_GM431946152.pdfIn PDF document text
    • http://bemviverclin.com.br/images/how-to-get-minecraft-java-for-free_GM479516143.pdfIn PDF document text
    • http://bemviverclin.com.br/images/roblox-games-that-give-you-free-robux_GM431946152.pdfIn PDF document text
    • http://bemviverclin.com.br/images/free-links-to-coin-master_GM406889139.pdfIn PDF document text
    • http://bemviverclin.com.br/images/coin-master-hack-safe_GM406889139.pdfIn PDF document text
    • http://bemviverclin.com.br/images/get-free-robux-com_GM431946152.pdfIn PDF document text
    • http://bemviverclin.com.br/images/sites-for-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://bemviverclin.com.br/images/free-robux-without-verification-2021_GM431946152.pdfIn PDF document text
    • http://bemviverclin.com.br/images/free-robux-generator-no-verification_GM431946152.pdfIn PDF document text
    • http://bemviverclin.com.br/images/coin-master-free-spin-group_GM406889139.pdfIn PDF document text
    • http://bemviverclin.com.br/images/roblox-download_GM431946152.pdfIn PDF document text
    • http://bemviverclin.com.br/images/all-free-items-in-roblox_GM431946152.pdfIn PDF document text
    • http://bemviverclin.com.br/images/coinmasterdailyfreespins-com_GM406889139.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_003_off0000476c.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x476C 24560 bytes
SHA-256: 9735b6dd59631365319074e5af207c781ee3b5ce2e0dd0887a11675499c7c1ca
font_01_sfnt_off00007ee8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7EE8 3560 bytes
SHA-256: c953d730e49f69c7d62e02a926729ae4a31de13d9a976dc4a95b39cf47066c93
font_02_sfnt_off00008b6e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8B6E 18652 bytes
SHA-256: 366d9c9b3cd0388843e044af578ba3ade018a9e96efb4083e0cc5bdd66e71c38

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