Malicious PDF — malware analysis report

Static analysis result for SHA-256 3cd21e8f804e7901…

MALICIOUS

PDF

34.6 KB Created: 2021-07-05 14:58:48 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-01
MD5: de697161305078136618c270a9cd1b77 SHA-1: ae76cb8c069ebff4cd5c50609b8ee57e2757868c SHA-256: 3cd21e8f804e79010c169ee6c51a6863a9462b1887419e8e64a1e7ee8afd443b
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. 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 0.9980

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.tw/app/406889139/coin-master-hack-2021-game-hack PDF link annotation
    • http://learning.mtsn6kotapdg.sch.id/__statics/gudangsoal/files/roblox-robux-hack-134_GM431946152.pdfIn PDF document text
    • http://learning.mtsn6kotapdg.sch.id/__statics/gudangsoal/files/cheat-codes-for-jail-tycoon-roblox_GM431946152.pdfIn PDF document text
    • http://learning.mtsn6kotapdg.sch.id/__statics/gudangsoal/files/minecraft-com-free_GM479516143.pdfIn PDF document text
    • http://learning.mtsn6kotapdg.sch.id/__statics/gudangsoal/files/how-to-get-free-robux-codes_GM431946152.pdfIn PDF document text
    • http://learning.mtsn6kotapdg.sch.id/__statics/gudangsoal/files/hex-number-gives-free-robux-by-robuxian_GM431946152.pdfIn PDF document text
    • http://learning.mtsn6kotapdg.sch.id/__statics/gudangsoal/files/free-robux-generator_GM431946152.pdfIn PDF document text
    • http://learning.mtsn6kotapdg.sch.id/__statics/gudangsoal/files/free-robux-no-verify-2021_GM431946152.pdfIn PDF document text
    • http://learning.mtsn6kotapdg.sch.id/__statics/gudangsoal/files/how-to-hack-in-roblox-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://learning.mtsn6kotapdg.sch.id/__statics/gudangsoal/files/coin-master-daily-free-spins_GM406889139.pdfIn PDF document text
    • http://learning.mtsn6kotapdg.sch.id/__statics/gudangsoal/files/bloxmarket-free-robux_GM431946152.pdfIn PDF document text
    • http://learning.mtsn6kotapdg.sch.id/__statics/gudangsoal/files/how-do-you-speed-hack-on-roblox-jailbreak_GM431946152.pdfIn PDF document text
    • http://learning.mtsn6kotapdg.sch.id/__statics/gudangsoal/files/roblox-free-ship-code_GM431946152.pdfIn PDF document text
    • http://learning.mtsn6kotapdg.sch.id/__statics/gudangsoal/files/hack-robux-no-verification-human_GM431946152.pdfIn PDF document text
    • http://learning.mtsn6kotapdg.sch.id/__statics/gudangsoal/files/roblox-does-free-follower-game-real_GM431946152.pdfIn PDF document text
    • http://learning.mtsn6kotapdg.sch.id/__statics/gudangsoal/files/block-hunt-hacks-roblox-pastebin_GM431946152.pdfIn PDF document text
    • http://learning.mtsn6kotapdg.sch.id/__statics/gudangsoal/files/robux-cheaten-ohne_GM431946152.pdfIn PDF document text
    • http://learning.mtsn6kotapdg.sch.id/__statics/gudangsoal/files/free-robux-without-downloading-anything_GM431946152.pdfIn PDF document text
    • http://learning.mtsn6kotapdg.sch.id/__statics/gudangsoal/files/minecraft-bedrock-edition-free_GM479516143.pdfIn PDF document text
    • http://learning.mtsn6kotapdg.sch.id/__statics/gudangsoal/files/how-to-get-the-free-robot-avatar-in-roblox_GM431946152.pdfIn PDF document text
    • http://learning.mtsn6kotapdg.sch.id/__statics/gudangsoal/files/free-gfx-roblox-2021_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_off0000312b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x312B 22704 bytes
SHA-256: d8f388e10ea6650de7abf485c269d485dd55e53805808f5275f69085d47459bf
font_01_sfnt_off000063f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x63F8 18408 bytes
SHA-256: 8438728008f6ab05b5c9a65d4eeb1f2e5c23a436eadc11c6e76328f72b7d7fb7

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