Malicious PDF — malware analysis report

Static analysis result for SHA-256 4e000e14cc2496e2…

MALICIOUS

PDF

41.5 KB Created: 2021-05-19 02:11:34 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 7affb2740a0b7c3fbacaa4460f9f7500 SHA-1: 1fbd1a0e4620312c13c99a1e4bd81049a0313d38 SHA-256: 4e000e14cc2496e2c7f2933f3424227f62317ddf6bb291805b4e9f3c045e4121
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.001 User Execution: Malicious Link

The PDF document contains a high-severity heuristic indicating it links to a game hack redirector, specifically targeting 'Coin Master' free spins. The document body and extracted URLs reinforce this, pointing to sites offering game cheats and potentially malicious downloads. The ML classifier also flagged this PDF as malicious with high confidence.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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-free-spins-and-coins-daily-links-game-hack PDF link annotation
    • https://smark.com.tw/image/data/files/free-robux-redeem-codes_GM431946152.pdfIn PDF document text
    • https://smark.com.tw/image/data/files/coin-master-free-spins-and-coins-for-today_GM406889139.pdfIn PDF document text
    • https://smark.com.tw/image/data/files/minecraft-free-play-now_GM479516143.pdfIn PDF document text
    • https://smark.com.tw/image/data/files/free-roblox-card-codes_GM431946152.pdfIn PDF document text
    • https://smark.com.tw/image/data/files/free-admin-roblox_GM431946152.pdfIn PDF document text
    • https://smark.com.tw/image/data/files/how-to-hack-a-roblox-account-2021_GM431946152.pdfIn PDF document text
    • https://smark.com.tw/image/data/files/minecraft-on-computer-free_GM479516143.pdfIn PDF document text
    • https://smark.com.tw/image/data/files/roblox-com-www_GM431946152.pdfIn PDF document text
    • https://smark.com.tw/image/data/files/how-to-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • https://smark.com.tw/image/data/files/is-minecraft-vr-free_GM479516143.pdfIn PDF document text
    • https://smark.com.tw/image/data/files/coin-master-free-2021-spin-link-today_GM406889139.pdfIn PDF document text
    • https://smark.com.tw/image/data/files/coin-master-hack-spins-free_GM406889139.pdfIn PDF document text
    • https://smark.com.tw/image/data/files/coin-master-pc-hack-download_GM406889139.pdfIn PDF document text
    • https://smark.com.tw/image/data/files/how-can-u-get-free-robux_GM431946152.pdfIn PDF document text
    • https://smark.com.tw/image/data/files/coin-master-free-spin-codes_GM406889139.pdfIn PDF document text
    • https://smark.com.tw/image/data/files/sites-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://smark.com.tw/image/data/files/free-coin-master-s_GM406889139.pdfIn PDF document text
    • https://smark.com.tw/image/data/files/free-coin-master-spins-links-2021_GM406889139.pdfIn PDF document text
    • https://smark.com.tw/image/data/files/android-coin-master-3433-apk-hack_GM406889139.pdfIn PDF document text
    • https://smark.com.tw/image/data/files/coin-master-free-daily-spins-link_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004850.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4850 24016 bytes
SHA-256: 0e6a3132beb6b941af97d47ad7ea439a9f5896b1cba986dd0984599e4652dad7
font_01_sfnt_off00007ea7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7EA7 18652 bytes
SHA-256: e3d0f3d2cfc9c6a1690771b503077d618c720b070dec55624c93c27d11531b52

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