Malicious PDF — malware analysis report

Static analysis result for SHA-256 087d3ed4a85c1e15…

MALICIOUS

PDF

33.5 KB Created: 2021-06-30 06:00:20 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: de6975d4dce670f2182abc74da5ef088 SHA-1: 57a7d1f4fe67ce5d1524b957014397794e2f422e SHA-256: 087d3ed4a85c1e1525c5797e19c1d033ab4655f2c414b395a232c4bc1712bed7
82 Risk Score

Malware Insights

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

The PDF document contains multiple embedded URLs and a heuristic firing for a browser installation lure, indicating a social engineering attempt to trick the user into downloading a file. The document body explicitly mentions 'Hack For Robux 2021' and includes a URL pointing to a potential application download, suggesting the primary goal is to distribute malware disguised as a game hack or utility. No scripts were extracted from this sample, but the presence of external URIs and the ML classifier's high confidence score strongly suggest malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 4

  • Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE
    Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
  • 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/hack-for-robux-2021-game-hack
    • http://pustaka.ust.ac.id/repository/free-robux-easy_GM431946152.pdf
    • http://pustaka.ust.ac.id/repository/how-to-get-free-robux-easy-no-download_GM431946152.pdf
    • http://pustaka.ust.ac.id/repository/coin-master-free-spins-link-today-instagram_GM406889139.pdf
    • http://pustaka.ust.ac.id/repository/free-codes-for-toys-on-roblox_GM431946152.pdf
    • http://pustaka.ust.ac.id/repository/free-spins-coin-master-app_GM406889139.pdf
    • http://pustaka.ust.ac.id/repository/coin-master-heaven-links_GM406889139.pdf
    • http://pustaka.ust.ac.id/repository/roblox-how-to-kick-players-with-cheat-engine_GM431946152.pdf
    • http://pustaka.ust.ac.id/repository/free-coin-spin-daily-link-net_GM406889139.pdf
    • http://pustaka.ust.ac.id/repository/free-stuff-on-roblox_GM431946152.pdf
    • http://pustaka.ust.ac.id/repository/hacker-flying-in-roblox-game_GM431946152.pdf
    • http://pustaka.ust.ac.id/repository/coin-master-hack-ios-no-verification_GM406889139.pdf
    • http://pustaka.ust.ac.id/repository/coin-master-free-cards_GM406889139.pdf
    • http://pustaka.ust.ac.id/repository/free-roblox-crown_GM431946152.pdf
    • http://pustaka.ust.ac.id/repository/get-robux-com_GM431946152.pdf
    • http://pustaka.ust.ac.id/repository/roblox-free-robux-com_GM431946152.pdf
    • http://pustaka.ust.ac.id/repository/pastebin-free-robux-fast_GM431946152.pdf
    • http://pustaka.ust.ac.id/repository/free-spins-for-coin-master_GM406889139.pdf
    • http://pustaka.ust.ac.id/repository/roblox-apocalypse-rising-cheat-engine-codes_GM431946152.pdf
    • http://pustaka.ust.ac.id/repository/does-roblox-premium-expire_GM431946152.pdf
    • http://pustaka.ust.ac.id/repository/coin-master-cheats_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_002_off00002bd6.bin
4ce6002a3e0cb99ff26cb95c0c4983f888b325fb44527aa78ae780de2fbdb08c		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x2BD6 22260 bytes
font_01_sfnt_off00005d13.bin
e03bcb89b8f7495d0a2bbcb3adbb50414e4e6f0d56292bef5731b73c76904da6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5D13 19288 bytes

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