Malicious PDF — malware analysis report

Static analysis result for SHA-256 9374898c4836d602…

MALICIOUS

PDF

45.5 KB Created: 2021-06-04 01:22:56 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 73ac73d86854bf6e57a7f59cbf11cef0 SHA-1: 22b41237f6114264ad1af89066ae4bd7e7c9265d SHA-256: 9374898c4836d602523600faed7ae8abd04e0406d53ff2c3e7aabff3eaee6be1
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. 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 0.9864

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 https://netcdn.online/app/431946152/free-robux-generator-2021-no-survey-game-hack PDF link annotation
    • http://pustaka.bbppketindan.info/repository/coin-master-free-spins-2021_GM406889139.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/coin-master-free-spin-and-coin_GM406889139.pdfIn PDF document text
    • http://pustaka.bbppketindan.info//repository/free-back-accessories-roblox_GM431946152.pdfIn PDF document text
    • http://pustaka.bbppketindan.info//repository/coin-master-free-coins--spins_GM406889139.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/minecraft-free-games-no-download_GM479516143.pdfIn PDF document text
    • http://pustaka.bbppketindan.info//repository/how-to-hack-someones-account-on-roblox_GM431946152.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/password-free-roblox-accounts_GM431946152.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/minecraft-free-apk_GM479516143.pdfIn PDF document text
    • http://pustaka.bbppketindan.info//repository/coin-master-game-legitimate-hack-without-signing-up-or-shareing_GM406889139.pdfIn PDF document text
    • http://pustaka.bbppketindan.info//repository/how-do-i-get-free-spins-in-coin-master_GM406889139.pdfIn PDF document text
    • http://pustaka.bbppketindan.info//repository/coin-master-daily-free-spin-and-coin_GM406889139.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/100-free-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://pustaka.bbppketindan.info//repository/coin-master-game-free_GM406889139.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/coin-master-free-spins-app-for-iphone_GM406889139.pdfIn PDF document text
    • http://pustaka.bbppketindan.info//repository/coin-master-free-spins-hack-2021_GM406889139.pdfIn PDF document text
    • http://pustaka.bbppketindan.info//repository/coin-master-pc-hack-tool_GM406889139.pdfIn PDF document text
    • http://pustaka.bbppketindan.info//repository/coin-master-daily-free-spins-link_GM406889139.pdfIn PDF document text
    • http://pustaka.bbppketindan.info//repository/free-spins_GM406889139.pdfIn PDF document text
    • http://pustaka.bbppketindan.info//repository/how-to-hack-someones-roblox-account_GM431946152.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/roblox-ban_GM431946152.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_off00005293.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5293 25160 bytes
SHA-256: 92d5f62e737d3448e896ad82b652a587f9ff870eba8be1a68ab6d109379d2ec9
font_01_sfnt_off00008ce8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8CE8 19044 bytes
SHA-256: 6a3befe032ce85dfab02daa9542f37d979e32cd852f1a969db8cf02301732b57

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