Malicious PDF — malware analysis report

Static analysis result for SHA-256 e75b31f0db5415d7…

MALICIOUS

PDF

35.5 KB Created: 2021-06-29 07:36:07 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 485825d15bec0be6e72e3a796457d1e8 SHA-1: e46e5aa549c5ed92e48899df29a84218d5d68799 SHA-256: e75b31f0db5415d7023ff797855534a6e213bdc6017ec6dcae5c8176ab370944
82 Risk Score

Malware Insights

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

The PDF contains a high-severity heuristic indicating it links to a game hack redirector, specifically mentioning 'Roblox Battle Royale Hack Script'. The document body also contains the same URL, reinforcing the lure. This suggests the file is designed to trick users into visiting a malicious site, likely for malware distribution or credential harvesting.

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/roblox-battle-royale-hack-script-game-hack PDF link annotation
    • https://smark.com.tw/image/data/files/how-can-i-get-free-robux-for-friends_GM431946152.pdfIn PDF document text
    • https://smark.com.tw/image/data/files/how-to-get-free-robux-without-verification_GM431946152.pdfIn PDF document text
    • https://smark.com.tw/image/data/files/aimbot-exe-roblox_GM431946152.pdfIn PDF document text
    • https://smark.com.tw/image/data/files/free-roblox-boy-hair_GM431946152.pdfIn PDF document text
    • https://smark.com.tw/image/data/files/minecraft-on-computer-free_GM479516143.pdfIn PDF document text
    • https://smark.com.tw/image/data/files/free-robux-2021-no-human-verification_GM431946152.pdfIn PDF document text
    • https://smark.com.tw/image/data/files/did-roblox-block-cheat-engine_GM431946152.pdfIn PDF document text
    • https://smark.com.tw/image/data/files/how-to-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • https://smark.com.tw/image/data/files/robux-com-free_GM431946152.pdfIn PDF document text
    • https://smark.com.tw/image/data/files/roblox-hack-scripprison-ecape_GM431946152.pdfIn PDF document text
    • https://smark.com.tw/image/data/files/how-to-get-free-robux-on-phone_GM431946152.pdfIn PDF document text
    • https://smark.com.tw/image/data/files/coin-master-free-spins-and-coins-daily-links_GM406889139.pdfIn PDF document text
    • https://smark.com.tw/image/data/files/free-robux-hack_GM431946152.pdfIn PDF document text
    • https://smark.com.tw/image/data/files/free-roblox-dominus_GM431946152.pdfIn PDF document text
    • https://smark.com.tw/image/data/files/fbchampion-com_GM406889139.pdfIn PDF document text
    • https://smark.com.tw/image/data/files/free-robux-no-verification-no-download-2021_GM431946152.pdfIn PDF document text
    • https://smark.com.tw/image/data/files/coin-master-hack-unlimited-spins-apk-download_GM406889139.pdfIn PDF document text
    • https://smark.com.tw/image/data/files/coin-master-key-free-spin_GM406889139.pdfIn PDF document text
    • https://smark.com.tw/image/data/files/hack-struicid-stop-start-roblox_GM431946152.pdfIn PDF document text
    • https://smark.com.tw/image/data/files/how-to-hack-roblox-accounts_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_off00003228.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3228 22784 bytes
SHA-256: dd252285c14229c589e0cd06169cd1d1c227808afe2a5d4acef497c77af830c2
font_01_sfnt_off00006535.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6535 19236 bytes
SHA-256: 661892e976e2dbca543bc3283f361b413bc00eb3b1b796d0ad08261c4dce185c

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