Malicious PDF — malware analysis report

Static analysis result for SHA-256 06ed27fb62f776eb…

MALICIOUS

PDF

35.8 KB Created: 2021-07-04 18:44:39 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-05
MD5: cff53881541f2c98f1bb146c09507865 SHA-1: 151956a018123349d73689e37f0f8bbfaa199fa4 SHA-256: 06ed27fb62f776eb40140090a819360bbc81b2cff198a084919636f3ce3181b3
122 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. It uses a LOLBin command-execution lure. 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 5

  • 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.
  • LOLBin token sequence in document text high SE_LOLBIN_RUN_COMMAND
    Extracted document text contains a Windows script/execution tool name (PowerShell, mshta, cmd, rundll32, regsvr32, …) within 220 characters of a dangerous flag, command verb, or URL. This is a visible 'run this' instruction in HTML/PDF/RTF lure bodies, or — in macro-laden Office files — the macro's own string-pool entries appearing adjacent in extracted text.
  • 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/431946152/easy-way-to-get-free-robux-game-hack PDF link annotation
    • http://lib.icbc-indonesia.org/repository/how-to-hack-sword-fighting-tournament-on-roblox-2021_GM431946152.pdfIn PDF document text
    • http://lib.icbc-indonesia.org/repository/get-robux-free-no-survey-waiting_GM431946152.pdfIn PDF document text
    • http://lib.icbc-indonesia.org/repository/comment-hacker-roblox-avec-cmd_GM431946152.pdfIn PDF document text
    • http://lib.icbc-indonesia.org/repository/how-to-use-free-robux-cheat-codes_GM431946152.pdfIn PDF document text
    • http://lib.icbc-indonesia.org/repository/roblox-hacked-client-kill-people_GM431946152.pdfIn macro / runtime command snippet
    • http://lib.icbc-indonesia.org/repository/coin-master-hack-club_GM406889139.pdfIn PDF document text
    • http://lib.icbc-indonesia.org/repository/roblox-popular-hacker_GM431946152.pdfIn PDF document text
    • http://lib.icbc-indonesia.org/repository/free-24-7-minecraft-server_GM479516143.pdfIn PDF document text
    • http://lib.icbc-indonesia.org/repository/roblox-twister-murder-how-to-hack-credits_GM431946152.pdfIn PDF document text
    • http://lib.icbc-indonesia.org/repository/roblox-robux-card-hack_GM431946152.pdfIn PDF document text
    • http://lib.icbc-indonesia.org/repository/el-mejor-hack-para-roblox-indetectable_GM431946152.pdfIn PDF document text
    • http://lib.icbc-indonesia.org/repository/coin-master-free-spin-link-today-50_GM406889139.pdfIn PDF document text
    • http://lib.icbc-indonesia.org/repository/how-to-get-minecoins-in-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://lib.icbc-indonesia.org/repository/free-robux-gift-card-codes-wikia_GM431946152.pdfIn PDF document text
    • http://lib.icbc-indonesia.org//repository/coin-master-free-coins-links-2021_GM406889139.pdfIn PDF document text
    • http://lib.icbc-indonesia.org/repository/2021-roblox-hacks-february-2021_GM431946152.pdfIn PDF document text
    • http://lib.icbc-indonesia.org//repository/coin-master-hack-online-no-human-verification_GM406889139.pdfIn PDF document text
    • http://lib.icbc-indonesia.org/repository/free-modded-minecraft-server_GM479516143.pdfIn PDF document text
    • http://lib.icbc-indonesia.org/repository/roblox-free-items-in-catalog-2021_GM431946152.pdfIn PDF document text
    • http://lib.icbc-indonesia.org/repository/roblox-ninja-blox-2-hack_GM431946152.pdfIn PDF document text
    • http://lib.icbc-indonesia.org/repositoryIn macro / runtime command snippet
    • 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_off00003347.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3347 23028 bytes
SHA-256: d5da64f66821153701d6689438b942a3cd209cac223aba703977b46440208f86
font_01_sfnt_off00006687.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6687 19196 bytes
SHA-256: 64e8f018724e62164b0ada1d77f482f882d8547e2dcd2accc6d14ba4748306e9

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