Malicious PDF — malware analysis report

Static analysis result for SHA-256 f1415d11b5ef4618…

MALICIOUS

PDF

42.6 KB Created: 2021-05-12 01:31:48 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: d3fcffe4322c6a33e8367e4eb351e77f SHA-1: 7fa32b2f430a297c2b5c5ad8ae94cdd5b4893efc SHA-256: f1415d11b5ef4618f2e02fb4b30b8ca76f6e1cfbdd898d16e8ec3f011f38039f
82 Risk Score

Malware Insights

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

The document presents a fake CAPTCHA and a download button lure, aiming to trick the user into clicking a malicious link. The primary external URI, https://netcdn.xyz/app/431946152/how-to-get-robux-on-phone-game-hack, is likely a landing page for a malicious payload. The ML classifier strongly flagged this PDF as malicious.

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/431946152/how-to-get-robux-on-phone-game-hack
    • https://mayunisma.sch.id/__statics/gudangsoal/files/how-to-get-free-faces-on-roblox_GM431946152.pdf
    • https://mayunisma.sch.id/__statics/gudangsoal/files/hackear-coin-master-android_GM406889139.pdf
    • https://mayunisma.sch.id/__statics/gudangsoal/files/daily-free-spins-coin-master-2021_GM406889139.pdf
    • https://mayunisma.sch.id/__statics/gudangsoal/files/free-daily-spins-coin-master_GM406889139.pdf
    • https://mayunisma.sch.id/__statics/gudangsoal/files/robux-giver_GM431946152.pdf
    • https://mayunisma.sch.id/__statics/gudangsoal/files/free-coins-for-coin-master-blogger_GM406889139.pdf
    • https://mayunisma.sch.id/__statics/gudangsoal/files/coin-master-hack-2021_GM406889139.pdf
    • https://mayunisma.sch.id/__statics/gudangsoal/files/free-robux-apk_GM431946152.pdf
    • https://mayunisma.sch.id/__statics/gudangsoal/files/free-minecraft-mods-for-xbox-one_GM479516143.pdf
    • https://mayunisma.sch.id/__statics/gudangsoal/files/mcpe-master-hack-unlimited-coins_GM406889139.pdf
    • https://mayunisma.sch.id/__statics/gudangsoal/files/free-coin-master-coins_GM406889139.pdf
    • https://mayunisma.sch.id/__statics/gudangsoal/files/robux-sites_GM431946152.pdf
    • https://mayunisma.sch.id/__statics/gudangsoal/files/funbloxxyz-free-robux_GM431946152.pdf
    • https://mayunisma.sch.id/__statics/gudangsoal/files/moon-active_GM406889139.pdf
    • https://mayunisma.sch.id/__statics/gudangsoal/files/coin-master-free-daily-spins-and-coins_GM406889139.pdf
    • https://mayunisma.sch.id/__statics/gudangsoal/files/sites-for-free-spins-for-coin-master_GM406889139.pdf
    • https://mayunisma.sch.id/__statics/gudangsoal/files/free-spin-and-coin-blogspot-com_GM406889139.pdf
    • https://mayunisma.sch.id/__statics/gudangsoal/files/can-i-get-robux-for-free_GM431946152.pdf
    • https://mayunisma.sch.id/__statics/gudangsoal/files/free-spins-for-coin-master-without-human-verification_GM406889139.pdf
    • https://mayunisma.sch.id/__statics/gudangsoal/files/coin-master-spin-hack-app_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off0000482d.bin
44fa63a8b4a28b26778741a74a1f65e139b18c34929b257707a7cc8aa56b6bdc		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x482D 25520 bytes
font_01_sfnt_off0000837a.bin
9dbfb1b9e6352e67373853b36194919d875182936c6781c0eccbeab0d11d3af5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x837A 18440 bytes

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