Malicious PDF — malware analysis report

Static analysis result for SHA-256 3cc9a978015b4d54…

MALICIOUS

PDF

35.6 KB Created: 2021-07-05 20:40:41 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-05
MD5: d982a9b81424d1c6c80a6431ae4fb752 SHA-1: 0a2cf2449aad488196a4962133fe25a9e597edf7 SHA-256: 3cc9a978015b4d5403008d730e488fbaf60d4c84f670f2f80849c5c14164dcaa
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple embedded URLs that redirect to sites offering game hacks and free currency, such as Coin Master and Roblox. The heuristic 'PDF_GAME_HACK_REDIRECT_LURE' strongly indicates a social engineering tactic to trick users into visiting potentially malicious sites. The ML classifier also flagged this PDF as malicious with high confidence. The document body text and embedded URLs reinforce the lure of obtaining free in-game items.

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/haktuts-coin-master-free-daily-spins-game-hack PDF link annotation
    • https://elearningmtsn9jkt.net/__statics/gudangsoal/files/coin-master-hack-no-survey-or-verification_GM406889139.pdfIn PDF document text
    • https://elearningmtsn9jkt.net/__statics/gudangsoal/files/minecraft-apk-free-download_GM479516143.pdfIn PDF document text
    • http://www.elearningmtsn9jkt.net/__statics/gudangsoal/files/free-coins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://www.elearningmtsn9jkt.net/__statics/gudangsoal/files/how-to-hack-robux-with-cheat-engine-61_GM431946152.pdfIn PDF document text
    • http://www.elearningmtsn9jkt.net/__statics/gudangsoal/files/free-spin-coin-master-link-download_GM406889139.pdfIn PDF document text
    • https://elearningmtsn9jkt.net/__statics/gudangsoal/files/serverside-roblox-hack_GM431946152.pdfIn PDF document text
    • https://elearningmtsn9jkt.net/__statics/gudangsoal/files/free-robux-no-verification-2021_GM431946152.pdfIn PDF document text
    • https://elearningmtsn9jkt.net/__statics/gudangsoal/files/fbchampion_GM406889139.pdfIn PDF document text
    • http://www.elearningmtsn9jkt.net/__statics/gudangsoal/files/gamekit-robux-free_GM431946152.pdfIn PDF document text
    • http://www.elearningmtsn9jkt.net/__statics/gudangsoal/files/free-game-pack-with-google-play-coin-master_GM406889139.pdfIn PDF document text
    • https://elearningmtsn9jkt.net/__statics/gudangsoal/files/coin-master-free-spins-daily-fb-champion_GM406889139.pdfIn PDF document text
    • https://elearningmtsn9jkt.net/__statics/gudangsoal/files/how-to-download-minecraft-java-edition-for-free_GM479516143.pdfIn PDF document text
    • http://www.elearningmtsn9jkt.net/__statics/gudangsoal/files/is-it-safe-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://elearningmtsn9jkt.net/__statics/gudangsoal/files/pig-master-free-spins-and-coins_GM406889139.pdfIn PDF document text
    • https://elearningmtsn9jkt.net/__statics/gudangsoal/files/free-robux-site_GM431946152.pdfIn PDF document text
    • https://elearningmtsn9jkt.net/__statics/gudangsoal/files/free-robux-no-human-verification-or-survey-2021_GM431946152.pdfIn PDF document text
    • http://www.elearningmtsn9jkt.net/__statics/gudangsoal/files/free-robux-no-verification-needed_GM431946152.pdfIn PDF document text
    • https://elearningmtsn9jkt.net/__statics/gudangsoal/files/google-roblox-games_GM431946152.pdfIn PDF document text
    • https://elearningmtsn9jkt.net/__statics/gudangsoal/files/roblox-but_GM431946152.pdfIn PDF document text
    • http://www.elearningmtsn9jkt.net/__statics/gudangsoal/files/roblox-hack-unlimited-robux_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_off00003324.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3324 22984 bytes
SHA-256: 1b075ab28f93cb3995d245d134255cd554fdb055797fce0f1c333893625c7748
font_01_sfnt_off000066b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x66B5 18904 bytes
SHA-256: b7f24531c88ef09d261a29b7b412295c42d9b915df36cfe91f545608b0580658

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