Malicious PDF — malware analysis report

Static analysis result for SHA-256 d63c3a4ed0633c8f…

MALICIOUS

PDF

48.2 KB Created: 2021-06-03 13:38:11 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: f70ca5be0464019fb90d289e7eca2c18 SHA-1: 9f1d0aaafd0791296b5ebdcc797474234c5c5b35 SHA-256: d63c3a4ed0633c8f86734be4ba2d619170c4a7fa233a61016f8c6c32b053756c
122 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

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.online/app/431946152/how-to-hack-someone-on-roblox-game-hack PDF link annotation
    • http://e-lib.smaxaverius5.sch.id/repository/roblox-cheat-codes_GM431946152.pdfIn PDF document text
    • http://e-lib.smaxaverius5.sch.id/repository/coin-master-apk_GM406889139.pdfIn PDF document text
    • http://e-lib.smaxaverius5.sch.id/repository/coin-master-free-spins-hack-download_GM406889139.pdfIn PDF document text
    • http://e-lib.smaxaverius5.sch.id/repository/free-coin-master-glitches_GM406889139.pdfIn PDF document text
    • http://e-lib.smaxaverius5.sch.id/repository/coin-master-free-spins-daily_GM406889139.pdfIn PDF document text
    • http://e-lib.smaxaverius5.sch.id/repository/show-me-how-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://e-lib.smaxaverius5.sch.id/repository/coin-master-hack-apk-link_GM406889139.pdfIn PDF document text
    • http://e-lib.smaxaverius5.sch.id/repository/how-to-hack-minecraft_GM479516143.pdfIn PDF document text
    • http://e-lib.smaxaverius5.sch.id/repository/coin-master-spins-hack_GM406889139.pdfIn PDF document text
    • http://e-lib.smaxaverius5.sch.id/repository/robux-matchcomfree-robux_GM431946152.pdfIn PDF document text
    • http://e-lib.smaxaverius5.sch.id/repository/how-to-get-hacks-on-minecraft_GM479516143.pdfIn PDF document text
    • http://e-lib.smaxaverius5.sch.id/repository/spin-coin-master-free_GM406889139.pdfIn PDF document text
    • http://e-lib.smaxaverius5.sch.id/repository/coin-master-spin-pattern_GM406889139.pdfIn PDF document text
    • http://e-lib.smaxaverius5.sch.id/repository/coin-master-free-cards-link-2021-today_GM406889139.pdfIn PDF document text
    • http://e-lib.smaxaverius5.sch.id/repository/how-to-get-free-robux-without-downloading-apps-2021_GM431946152.pdfIn PDF document text
    • http://e-lib.smaxaverius5.sch.id/repository/i-want-robux_GM431946152.pdfIn PDF document text
    • http://e-lib.smaxaverius5.sch.id/repository/how-to-get-free-robux-on-android_GM431946152.pdfIn PDF document text
    • http://e-lib.smaxaverius5.sch.id/repository/rblx-gg-free-robux_GM431946152.pdfIn PDF document text
    • http://e-lib.smaxaverius5.sch.id/repository/minecraft-tower-defense-hacked_GM479516143.pdfIn PDF document text
    • http://e-lib.smaxaverius5.sch.id/repository/free-minecraft-education-edition_GM479516143.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
font_00_sfnt_off00005090.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5090 25784 bytes
SHA-256: 031cb471a94bce39bc181344655d143903caaed72f0e0e23d7791e855c76f350
font_01_sfnt_off00008b74.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8B74 5696 bytes
SHA-256: 450e3ee45915afe13702bf1d587eb8b9ad88a8d2113419ac9f2fd116a828e139
font_02_sfnt_off00009886.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9886 18608 bytes
SHA-256: eebf4fd0ce8e014a693b7448b6f63c7fd528199174cddc1a90a23252bff1a633

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