Malicious PDF — malware analysis report

Static analysis result for SHA-256 1b3e7a2845290da9…

MALICIOUS

PDF

43.3 KB Created: 2021-06-11 00:11:04 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: f087b877be3d55292d5bd3810b031e85 SHA-1: 127e73a93f9a5f47ab2bc95b65350e76b936778d SHA-256: 1b3e7a2845290da990aa9cbdb527016de3dc58e91bfa1ac46ff59ba72d18ebee
122 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by an ML classifier. It uses a clipboard-command (paste-and-run) 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 0.9987

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.
  • Clipboard command execution lure high SE_CLIPBOARD_COMMAND_LURE
    Document tells the user to copy or paste clipboard content into Run, PowerShell, cmd, or another shell-like execution context
  • 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 https://netcdn.tw/app/431946152/hacks-para-roblox-agosto-2021-game-hack PDF link annotation
    • http://lib.untad.ac.id/repository/coin-master-get-free-cards_GM406889139.pdfIn PDF document text
    • http://lib.untad.ac.id//repository/mcpe-master-unlimited-coins-hack-apk_GM406889139.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/hack-de-roblox-dinero-rozitizens_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/how-to-robux_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id//repository/daily-free-spin-and-coin_GM406889139.pdfIn PDF document text
    • http://lib.untad.ac.id//repository/free-robux-scam_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/robux-generator_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id//repository/free-coin-spin_GM406889139.pdfIn PDF document text
    • http://lib.untad.ac.id//repository/how-to-make-free-robux_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id//repository/coin-master-daily-free-spins-link_GM406889139.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/oprewards-login_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id//repository/coin-master-hack-without-verification-code_GM406889139.pdfIn PDF document text
    • http://lib.untad.ac.id//repository/coin-master-hack-2021-android_GM406889139.pdfIn PDF document text
    • http://lib.untad.ac.id//repository/how-to-hack-minecraft_GM479516143.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/best-way-to-get-robux_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/worst-roblox-avatars_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/coin-master-hack-version-33-2_GM406889139.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/free-roblox-accounts-with-robux-that-work-not-banned_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/roblox-non-free-models_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/coin-master-hack-no-download_GM406889139.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
stream_002_off00004a15.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4A15 25628 bytes
SHA-256: 5ad50d84239243ec7c9f2584ca34b16e44ec8d7cce63d485086a55d0745a12a4
font_01_sfnt_off00008481.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8481 19132 bytes
SHA-256: cdb04b08e0ecd2f2f8965a56c97e81d28a7bf06463aff33c0e61ac9b8fb55a18

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