Malicious PDF — malware analysis report

Static analysis result for SHA-256 2d3d50196016ef48…

MALICIOUS

PDF

45.5 KB Created: 2021-05-11 00:00:20 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 90664042dbb7945851e7fb808e6bc776 SHA-1: e20b2c6ba172785f2f69c5b6866da63fc5b54f5e SHA-256: 2d3d50196016ef481519bbf76df63b46383273c155d94dcd036ae1cdaf54cd39
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 0.9507

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.xyz/app/479516143/minecraft-windows-10-free-code-game-hack PDF link annotation
    • http://pustaka.stikesperintis.ac.id/repository/roblox-hack-unlimited-robux_GM431946152.pdfIn PDF document text
    • http://pustaka.stikesperintis.ac.id/repository/coin-free-spin_GM406889139.pdfIn PDF document text
    • http://pustaka.stikesperintis.ac.id/repository/hacks-para-roblox_GM431946152.pdfIn PDF document text
    • http://pustaka.stikesperintis.ac.id/repository/free-robux-discord_GM431946152.pdfIn PDF document text
    • http://pustaka.stikesperintis.ac.id/repository/free-robux-place_GM431946152.pdfIn PDF document text
    • http://pustaka.stikesperintis.ac.id/repository/code-free-robux_GM431946152.pdfIn PDF document text
    • http://pustaka.stikesperintis.ac.id/repository/get-free-robux-without-doing-anything_GM431946152.pdfIn PDF document text
    • http://pustaka.stikesperintis.ac.id/repository/free-roblox-dominus_GM431946152.pdfIn PDF document text
    • http://pustaka.stikesperintis.ac.id/repository/is-minecraft-free-on-mac_GM479516143.pdfIn PDF document text
    • http://pustaka.stikesperintis.ac.id/repository/roblox-hack-generator_GM431946152.pdfIn PDF document text
    • http://pustaka.stikesperintis.ac.id/repository/minecraft-the-complete-handbook-collection_GM479516143.pdfIn PDF document text
    • http://pustaka.stikesperintis.ac.id/repository/how-to-get-free-robux-easy-2021_GM431946152.pdfIn PDF document text
    • http://pustaka.stikesperintis.ac.id/repository/claimrbx-free-robux_GM431946152.pdfIn PDF document text
    • http://pustaka.stikesperintis.ac.id/repository/minecraft-survival-hacks_GM479516143.pdfIn PDF document text
    • http://pustaka.stikesperintis.ac.id/repository/hack-robux_GM431946152.pdfIn PDF document text
    • http://pustaka.stikesperintis.ac.id/repository/coin-master-coins_GM406889139.pdfIn PDF document text
    • http://pustaka.stikesperintis.ac.id/repository/free-spins-for-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://pustaka.stikesperintis.ac.id/repository/how-to-get-free-robux-no-verification_GM431946152.pdfIn PDF document text
    • http://pustaka.stikesperintis.ac.id/repository/free-spin-gratis-coin-master_GM406889139.pdfIn PDF document text
    • http://pustaka.stikesperintis.ac.id/repository/coin-master-free-spin-and-coins-links-2021_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004a82.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4A82 26256 bytes
SHA-256: a068821ae923eb30fcdc47c1aa7503d0ccfec9d6e898d5c7042a784b8d621277
font_01_sfnt_off0000847b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x847B 2880 bytes
SHA-256: 10d025f04f706eb71cdda4f99784df1b9ccb52e48080e43095e0398eaef6f132
font_02_sfnt_off00008e66.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8E66 18524 bytes
SHA-256: 61f4e129dbb086a6f9797ef369c55cdd3b58d633037fca8f4f59eaf5785788a4

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