Malicious PDF — malware analysis report

Static analysis result for SHA-256 b8e54c63b468cfeb…

MALICIOUS

PDF

34.3 KB Created: 2021-06-17 19:40:40 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 4b54c6882f85e9a42d3e0f5194b0badb SHA-1: aacaf1971b0fc2667017539bc4055182dd00c32f SHA-256: b8e54c63b468cfeba647bfc0c7f9e34d884e4336f907b2127a5df2979bb1d574
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF document contains multiple embedded URLs, with a primary focus on luring users with promises of game hacks and free currency for popular games like Roblox and Coin Master. The heuristic 'PDF_GAME_HACK_REDIRECT_LURE' strongly indicates this malicious intent. The ML classifier also flagged this PDF with high confidence. The primary IOC is the redirector URL, which likely leads to a malicious site or further payload.

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.co/app/431946152/roblox-strucid-hacks-pastebin-game-hack PDF link annotation
    • http://library.ulb.ac.id/repository/robux-free-promo-codes_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/coin-master-hack-safe_GM406889139.pdfIn PDF document text
    • http://library.ulb.ac.id//repository/games-like-minecraft-but-free_GM479516143.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/coin-master-hack-here_GM406889139.pdfIn PDF document text
    • http://library.ulb.ac.id//repository/www-roblox-com-robux-free_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/conseguir-robux-en-roblox-hack-website_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/roblox-free-items_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id//repository/coin-mster-free_GM406889139.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/minecraft-redeem-code-free-2021_GM479516143.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/how-to-get-hacks-for-medieval-warfare-roblox_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/20210-free-spin-links-for-coin-master_GM406889139.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/free-robux-no-email_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/how-to-get-2021000-robux-for-free-only-one-click_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/how-to-change-your-username-on-roblox-for-free-2021_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id//repository/free-coin-master-spins-2021_GM406889139.pdfIn PDF document text
    • http://library.ulb.ac.id//repository/how-to-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id//repository/coin-master-hack-app_GM406889139.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/300-daily-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/pokemon-go-free-storage-upgrade_GM1094591345.pdfIn PDF document text
    • http://library.ulb.ac.id//repository/minecraft-java-account-free_GM479516143.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_off00002ed7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2ED7 22100 bytes
SHA-256: cb40700f92aa6410cd60b759c861a44f29e8e7c2d6b539ba12d0e946312ee4b6
font_01_sfnt_off00005ffa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5FFA 19348 bytes
SHA-256: 31b332e39f91364a354677b452eb0b769072648fb4ee17adbc53141060186da4

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