Malicious PDF — malware analysis report

Static analysis result for SHA-256 a8a019d844433e30…

MALICIOUS

PDF

33.7 KB Created: 2021-06-18 02:37:51 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-17
MD5: fc7c1d253e692481d8c32a417adac56b SHA-1: a63bc77d7cfda4aae68ed551d10bcfe0b122b577 SHA-256: a8a019d844433e30733df926f00ac48a51ec8688159310059cf56205b02c7e40
82 Risk Score

Malware Insights

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

The PDF document contains a high-severity heuristic indicating it links to a game hack redirector, specifically targeting Roblox and Coin Master. The embedded URL, http://netcdn.co/app/431946152/topkek-hack-roblox-game-hack, is the primary indicator of malicious intent. The document body and numerous other extracted URLs reinforce the theme of game cheats and hacks, suggesting a social engineering lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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 http://netcdn.co/app/431946152/topkek-hack-roblox-game-hack PDF link annotation
    • http://library.yamasi.ac.id//repository/free-coin-master-spins-2021_GM406889139.pdfIn PDF document text
    • http://library.yamasi.ac.id//repository/free-spin-coin-master-2021-link_GM406889139.pdfIn PDF document text
    • http://library.yamasi.ac.id//repository/coin-master-email-rewards-link_GM406889139.pdfIn PDF document text
    • http://library.yamasi.ac.id//repository/free-robux-hack-generator_GM431946152.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/how-do-you-get-admin-commands-in-roblox-for-free_GM431946152.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/how-do-you-hack-for-2021000-coins-on-flip-master_GM406889139.pdfIn PDF document text
    • http://library.yamasi.ac.id//repository/windows-10-minecraft-hacks_GM479516143.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/free-script-executor-lvl-7-roblox_GM431946152.pdfIn PDF document text
    • http://library.yamasi.ac.id//repository/roblox-rules_GM431946152.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/coin-spin_GM406889139.pdfIn PDF document text
    • http://library.yamasi.ac.id//repository/hack-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/hack-phantom-forces-roblox_GM431946152.pdfIn PDF document text
    • http://library.yamasi.ac.id//repository/minecraft-that-you-can-play-for-free_GM479516143.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/can-i-play-roblox-for-free_GM431946152.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/hack-coin-master-download-ios_GM406889139.pdfIn PDF document text
    • http://library.yamasi.ac.id//repository/how-to-get-free-clothes-on-roblox-2021_GM431946152.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/roblox-avatar-maker-free_GM431946152.pdfIn PDF document text
    • http://library.yamasi.ac.id//repository/get-free-spins-in-coin-master_GM406889139.pdfIn PDF document text
    • http://library.yamasi.ac.id//repository/roblox-generator_GM431946152.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/flamingo-free-shirt-templates-roblox_GM431946152.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
font_00_sfnt_off00002f2b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F2B 21708 bytes
SHA-256: 86001a5411342ce9cf1d63bba5736e3411b0df610c2fb17c5bec736954cbb772
font_01_sfnt_off00005f26.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5F26 18832 bytes
SHA-256: 8e205fccacd2a28c98fc7fac5f19c224e157b2d49ef8d3121e3d26f72a990fb8

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