Malicious PDF — malware analysis report

Static analysis result for SHA-256 158a5449dfbb96f8…

MALICIOUS

PDF

34.5 KB Created: 2021-07-04 14:11:40 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 52e80527fef46b2bc758540930747aab SHA-1: 79cce4d86a0188c88c5b04d495571185e122b2d3 SHA-256: 158a5449dfbb96f829f3b00ded03b078661dd83a96fb8f7a2e99a9e8847ea3a6
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF document contains multiple links, including a high-priority lure for game hacks, directing users to potentially malicious websites. The ML classifier strongly flagged this PDF as malicious, and the presence of embedded URLs further supports a phishing or scamming attempt. No scripts were extracted, but the document's structure and content indicate a lure to external resources.

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/406889139/coin-master-heaven-free-spins-today-game-hack PDF link annotation
    • http://library.futureuniversity.com/repository/how-to-get-free-spins-and-coins-in-coin-master_GM406889139.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/free-robux-javascript-2021_GM431946152.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/free-daily-coin-master-coins_GM406889139.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/free-robux-hack-no-verification_GM431946152.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/roblox-cheat-engine-hack-robux_GM431946152.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/roblox-play-as-guest-free_GM431946152.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/free-robux-no-email_GM431946152.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/free-robux-ml_GM431946152.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/how-to-get-free-robux-by-playing-roblox_GM431946152.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/coin-master-free-raid-link_GM406889139.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/https-pastebincom-incrible-hack-de-robux_GM431946152.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/roblox-best-anticheat_GM431946152.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/minecraft-bedrock-free-download-pc_GM479516143.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/how-to-hack-coin-master-spin-in-hindi_GM406889139.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/husky-roblox-free-robux-link_GM431946152.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/rbx-place-free-robux_GM431946152.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/free-spins-coin-master-apple_GM406889139.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/cheat-engine-roblox-bypass-zip_GM431946152.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/robux-hack-2021-new_GM431946152.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/roblox-bloxburgh-hacks_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_off00003083.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3083 22636 bytes
SHA-256: 0e7c535ce001ed1e10dc27b40404737007e69cc9cf4b6827280a56820ac593ff
font_01_sfnt_off000062e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x62E6 18640 bytes
SHA-256: 3d9153b17c01349321dbf9895197e00a389ef43fe3f4ac06fe2a253dcac379fc

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