Malicious PDF — malware analysis report

Static analysis result for SHA-256 7fe5b2aa7f1a945a…

MALICIOUS

PDF

47.1 KB Created: 2021-06-11 04:41:01 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-01
MD5: f075085536b0893e307bc158e1b3d3bf SHA-1: 88a743b3fe5535ece53a94e5fd37eb67f562fb58 SHA-256: 7fe5b2aa7f1a945a8a20b28e2692f5bbb99cd9fdf3bf632530d9d3391a131981
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 0.9769

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.tw/app/431946152/hack-script-roblox-game-servers-game-hack PDF link annotation
    • http://library.stieyapan.ac.id//repository/coin-master-hack-ios_GM406889139.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/free-robux-without-human-verification-2021_GM431946152.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/master-game_GM406889139.pdfIn PDF document text
    • http://library.stieyapan.ac.id//repository/minecraft-free-ios-2021_GM479516143.pdfIn PDF document text
    • http://library.stieyapan.ac.id//repository/minecraft-anarchy-server-no-hacks_GM479516143.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/coin-master-hack-xyz-download-free_GM406889139.pdfIn PDF document text
    • http://library.stieyapan.ac.id//repository/minecraft-bedrock-edition-free-with-java_GM479516143.pdfIn PDF document text
    • http://library.stieyapan.ac.id//repository/toolbox-for-minecraft-windows-10_GM479516143.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/free-dominus-userscriptorg-roblox_GM431946152.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/coin-master-free-400-spin-link_GM406889139.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/how-to-get-free-minecoins-in-minecraft_GM479516143.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/coin-master-hack-app_GM406889139.pdfIn PDF document text
    • http://library.stieyapan.ac.id//repository/coin-master-free-spins-app-for-iphone_GM406889139.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/free-coins-and-free-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/roblox-app-free-robux_GM431946152.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/give-me-free-robux_GM431946152.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/coin-master-heaven_GM406889139.pdfIn PDF document text
    • http://library.stieyapan.ac.id//repository/coin-master-free-link-spin_GM406889139.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/how-to-get-minecraft-bedrock-edition-on-pc-for-free_GM479516143.pdfIn PDF document text
    • http://library.stieyapan.ac.id//repository/robux-hack-me_GM431946152.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
font_00_sfnt_off00004d99.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4D99 25964 bytes
SHA-256: 33b9d71e3c3b82a01ba000ca1a78a4a8bde16df0f8c1da5b18709f3986ca2f69
font_01_sfnt_off00008912.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8912 2888 bytes
SHA-256: dcdd98ee8e25436a83587ccb4027347dd2c3fcec95f3413942edd4086125bcca
font_02_sfnt_off000092e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x92E6 18956 bytes
SHA-256: 8ef4401a9205fcf7c02fa33a0aa6541c79aa0425c192aea127246e03b10423fa

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