Malicious PDF — malware analysis report

Static analysis result for SHA-256 fe978acba2fa6480…

MALICIOUS

PDF

32.7 KB Created: 2021-07-05 12:41:50 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-01
MD5: 8e09b16bd0b73b2fe93380acb0147e91 SHA-1: 0c4444303885cc1bdb8e4b290f954aa4d7003648 SHA-256: fe978acba2fa6480d31a51ab55b4c653a313a6ffb5bb96657a21cca89e412fdf
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 0.9824

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 http://netcdn.tw/app/406889139/coin-master-app-for-free-spins-game-hack PDF link annotation
    • http://pustaka.smpmuh2yk.sch.id//repository/coin-master-500-free-spins_GM406889139.pdfIn PDF document text
    • http://pustaka.smpmuh2yk.sch.id/repository/how-to-get-free-robux-easy_GM431946152.pdfIn PDF document text
    • http://pustaka.smpmuh2yk.sch.id/repository/roblox-adopt-me-free_GM431946152.pdfIn PDF document text
    • http://pustaka.smpmuh2yk.sch.id/repository/coin-master-hacks-android_GM406889139.pdfIn PDF document text
    • http://pustaka.smpmuh2yk.sch.id//repository/free-domain-for-minecraft-server_GM479516143.pdfIn PDF document text
    • http://pustaka.smpmuh2yk.sch.id/repository/the-easiest-way-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://pustaka.smpmuh2yk.sch.id//repository/minecraft-free-ios-2021_GM479516143.pdfIn PDF document text
    • http://pustaka.smpmuh2yk.sch.id//repository/www-coinmaster_GM406889139.pdfIn PDF document text
    • http://pustaka.smpmuh2yk.sch.id/repository/mcpe-master-coins-hack-download_GM406889139.pdfIn PDF document text
    • http://pustaka.smpmuh2yk.sch.id//repository/free-bedrock-minecraft_GM479516143.pdfIn PDF document text
    • http://pustaka.smpmuh2yk.sch.id/repository/oblivion-hack-roblox-download_GM431946152.pdfIn PDF document text
    • http://pustaka.smpmuh2yk.sch.id//repository/coin-master-free-spins-for-today_GM406889139.pdfIn PDF document text
    • http://pustaka.smpmuh2yk.sch.id/repository/robux-matchcomfree-robux_GM431946152.pdfIn PDF document text
    • http://pustaka.smpmuh2yk.sch.id//repository/twitter-coin-master-free-spins-link_GM406889139.pdfIn PDF document text
    • http://pustaka.smpmuh2yk.sch.id/repository/how-to-downgrade-minecraft-pe_GM479516143.pdfIn PDF document text
    • http://pustaka.smpmuh2yk.sch.id//repository/coin-master-free-in-app-purchases-jailbreak_GM406889139.pdfIn PDF document text
    • http://pustaka.smpmuh2yk.sch.id/repository/how-to-get-free-unlimited-coins-in-coin-master_GM406889139.pdfIn PDF document text
    • http://pustaka.smpmuh2yk.sch.id//repository/free-printable-roblox-images_GM431946152.pdfIn PDF document text
    • http://pustaka.smpmuh2yk.sch.id//repository/minecraft-skins-free-girl_GM479516143.pdfIn PDF document text
    • http://pustaka.smpmuh2yk.sch.id/repository/wwwcoin-master-free-spincom_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_001_off00002b2e.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x2B2E 22568 bytes
SHA-256: b1c61835a38836b8f969e975b9ef53e925221ea37982c0b6b676076c3e9522f2
font_01_sfnt_off00005d97.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5D97 18176 bytes
SHA-256: bc884a3229ed83de6fe0f09d3de4cbfae9ae8b960387018b9df9e9e5860be4ee

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