Malicious PDF — malware analysis report

Static analysis result for SHA-256 2dd599932650b83b…

MALICIOUS

PDF

47.7 KB Created: 2021-06-03 22:52:14 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 1c29615dfd15a86db8abd1647d18ff7d SHA-1: f6634fd60578369695833863dcb9ed170685c9bf SHA-256: 2dd599932650b83b1b65fd9158138bfd66fd2daa12b23f4a72a4b1f386ca012f
122 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a lure for game hacks and free currency, directing users to a suspicious URL. The presence of a fake CAPTCHA heuristic indicates an attempt to trick users into interacting with the document, likely to download or execute further malicious content. The document's structure and embedded links suggest it is part of a phishing campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9769

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/apps-that-give-you-free-robux-game-hack PDF link annotation
    • http://e-lib.smaxaverius5.sch.id/repository/free-spins-coin-master-hack-2021_GM406889139.pdfIn PDF document text
    • http://e-lib.smaxaverius5.sch.id/repository/free-robux-obby-2021_GM431946152.pdfIn PDF document text
    • http://e-lib.smaxaverius5.sch.id/repository/websites-that-give-you-free-robux_GM431946152.pdfIn PDF document text
    • http://e-lib.smaxaverius5.sch.id/repository/hack-version-of-coin-master_GM406889139.pdfIn PDF document text
    • http://e-lib.smaxaverius5.sch.id/repository/roblox-army-free-robux_GM431946152.pdfIn PDF document text
    • http://e-lib.smaxaverius5.sch.id/repository/coin-master-free-spins-link-2021-no-verification_GM406889139.pdfIn PDF document text
    • http://e-lib.smaxaverius5.sch.id/repository/how-to-hack-roblox_GM431946152.pdfIn PDF document text
    • http://e-lib.smaxaverius5.sch.id/repository/free-spin-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://e-lib.smaxaverius5.sch.id/repository/free-spins-on-coin-master-link_GM406889139.pdfIn PDF document text
    • http://e-lib.smaxaverius5.sch.id/repository/coin-master-vip-hack_GM406889139.pdfIn PDF document text
    • http://e-lib.smaxaverius5.sch.id/repository/how-do-you-get-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • http://e-lib.smaxaverius5.sch.id/repository/coin-master-hack-fast_GM406889139.pdfIn PDF document text
    • http://e-lib.smaxaverius5.sch.id/repository/coin-master-deals_GM406889139.pdfIn PDF document text
    • http://e-lib.smaxaverius5.sch.id/repository/coin-master-free-spin-daily-link_GM406889139.pdfIn PDF document text
    • http://e-lib.smaxaverius5.sch.id/repository/how-to-get-free-unlimited-robux_GM431946152.pdfIn PDF document text
    • http://e-lib.smaxaverius5.sch.id/repository/how-to-play-minecraft-with-friends-for-free_GM479516143.pdfIn PDF document text
    • http://e-lib.smaxaverius5.sch.id/repository/com-roblox_GM431946152.pdfIn PDF document text
    • http://e-lib.smaxaverius5.sch.id/repository/hack-xp-net-generators-coin-master_GM406889139.pdfIn PDF document text
    • http://e-lib.smaxaverius5.sch.id/repository/free-robux-now_GM431946152.pdfIn PDF document text
    • http://e-lib.smaxaverius5.sch.id/repository/coin-master-free-coins-and-spins-online-tool_GM406889139.pdfIn PDF document text
    • https://krnl.rocksIn 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_off000051b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x51B4 23920 bytes
SHA-256: 940f7c45d860b0579756fddd1b091a2d87db8eeba849184dc9e62550e00ba3ed
font_01_sfnt_off00008824.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8824 4016 bytes
SHA-256: 81cee7a165ea5c2faee550083c83dae633e6f003c2a0fba217ab80cdde32eb7b
font_02_sfnt_off0000953f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x953F 19084 bytes
SHA-256: 837a639daa187fc447bd118567dc66774ab6c99c19a83daf34219dbfdd013636

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