Malicious PDF — malware analysis report

Static analysis result for SHA-256 1275231b78b97169…

MALICIOUS

PDF

34.6 KB Created: 2021-07-04 23:42:07 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 364ee8d21e1055fd921883fda2a72391 SHA-1: 53fc518ed93484a12250be22e95578218bcff58b SHA-256: 1275231b78b97169aef09a4e92bef2aa8ba771ff88607bba4f81bb9ee22669ee
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a high-severity heuristic indicating it links to a 'free generator / game hack' lure. The document body and extracted URLs reinforce this, pointing to sites promising free Robux and game hacks. The primary malicious URL identified is http://netcdn.tw/app/431946152/how-can-u-get-free-robux-game-hack, which is likely the destination for the scam.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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/431946152/how-can-u-get-free-robux-game-hack PDF link annotation
    • http://library.stieyapan.ac.id/repository/how-to-get-free-roblox-badges_GM431946152.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/coin-master-spin-free_GM406889139.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/free-coin-master-spin-generator_GM406889139.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/client-minecraft_GM479516143.pdfIn PDF document text
    • http://library.stieyapan.ac.id//repository/blox-fish-free-robux_GM431946152.pdfIn PDF document text
    • http://library.stieyapan.ac.id//repository/roblox-games-that-give-you-free-robux_GM431946152.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/how-to-get-free-robux-no-scam_GM431946152.pdfIn PDF document text
    • http://library.stieyapan.ac.id//repository/roblox-script-hack_GM431946152.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/minecraft-hacker-skin_GM479516143.pdfIn PDF document text
    • http://library.stieyapan.ac.id//repository/how-to-download-minecraft-for-free-on-your-phone_GM479516143.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/free-robux-generatore_GM431946152.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/how-to-download-minecraft-hacks_GM479516143.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/rbx-free-robux_GM431946152.pdfIn PDF document text
    • http://library.stieyapan.ac.id//repository/coin-master-app_GM406889139.pdfIn PDF document text
    • http://library.stieyapan.ac.id//repository/coin-master-hack-pro-gamers_GM406889139.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/get-coin-master-free-spin_GM406889139.pdfIn PDF document text
    • http://library.stieyapan.ac.id//repository/free-roblox-adopt-me-pets_GM431946152.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/get-free-spins-coin-master-october-2021_GM406889139.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/best-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://library.stieyapan.ac.id//repository/how-to-get-roebucks-in-roblox_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_off00003038.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3038 22464 bytes
SHA-256: 6233866ea30a859b536c173202589888089646f1ba656d1b1d4d4d53710af811
font_01_sfnt_off0000625a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x625A 18984 bytes
SHA-256: 4698faf456f89a42db1aab957ed0472ea92275296e6b47032fd7fe1dc79199a2

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