Malicious PDF — malware analysis report

Static analysis result for SHA-256 5f995cf94d656199…

MALICIOUS

PDF

34.5 KB Created: 2021-06-29 21:22:54 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: b25d5f89f430df4725f1dec83f968c81 SHA-1: 3e4e51bc479e2a13f283e387ea48a812be566770 SHA-256: 5f995cf94d656199fc1021a816165b3f71f207f74cba188580dd8a0c9305b4f7
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF document contains a high-confidence heuristic firing for a game hack lure, directing users to a suspicious URL. The document body also contains this URL, reinforcing the lure. The presence of numerous similar URLs further suggests a campaign distributing malicious files disguised as game cheats.

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-hack-mod-apk-game-hack PDF link annotation
    • https://beauty911.tw/upload/files/roblox-elemental-cheat-engine_GM431946152.pdfIn PDF document text
    • https://beauty911.tw/upload/files/cpbildco-robux_GM431946152.pdfIn PDF document text
    • https://beauty911.tw/upload/files/roblox-project-pokemon-dupe-hack_GM431946152.pdfIn PDF document text
    • https://beauty911.tw/upload/files/robux-hacks-no-verification-2021-computer_GM431946152.pdfIn PDF document text
    • https://beauty911.tw/upload/files/claimrbx-free-robux_GM431946152.pdfIn PDF document text
    • https://beauty911.tw/upload/files/free-robux-no-human-verification-or-survey-2021_GM431946152.pdfIn PDF document text
    • https://beauty911.tw/upload/files/infinite-jump-roblox-hack-descargar_GM431946152.pdfIn PDF document text
    • https://beauty911.tw/upload/files/wanna-join-my-free-giftcard-giveaway-roblox-id_GM431946152.pdfIn PDF document text
    • https://beauty911.tw/upload/files/roblox-no-download-hack_GM431946152.pdfIn PDF document text
    • https://beauty911.tw/upload/files/free-robux-para-roblox_GM431946152.pdfIn PDF document text
    • https://beauty911.tw/upload/files/how-can-i-get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://beauty911.tw/upload/files/free-robux-for-no-money_GM431946152.pdfIn PDF document text
    • https://beauty911.tw/upload/files/www-roblox-cheat-u_GM431946152.pdfIn PDF document text
    • https://beauty911.tw/upload/files/objet-gratuit-roblox-hack_GM431946152.pdfIn PDF document text
    • https://beauty911.tw/upload/files/how-to-hack-gta-on-roblox-mobile_GM431946152.pdfIn PDF document text
    • https://beauty911.tw/upload/files/free-robux-card-codes_GM431946152.pdfIn PDF document text
    • https://beauty911.tw/upload/files/roblox-mobile-hack-android_GM431946152.pdfIn PDF document text
    • https://beauty911.tw/upload/files/my-minecraft-account-was-hacked_GM479516143.pdfIn PDF document text
    • https://beauty911.tw/upload/files/roblox-hack-space_GM431946152.pdfIn PDF document text
    • https://beauty911.tw/upload/files/freer-pro-tiktok-fans_GM835599320.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_off00002fd9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2FD9 22132 bytes
SHA-256: 3a390921413387f01dc037ef18d67e25ed6a1423dda6c296509890bd57ab3aff
font_01_sfnt_off0000611e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x611E 19200 bytes
SHA-256: 611a1d178886eadfe3f56fa1e33ab3aac129b6967c34066b36d6a75dc73df60a

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