Malicious PDF — malware analysis report

Static analysis result for SHA-256 7c29ff9dc99cfb93…

MALICIOUS

PDF

34.2 KB Created: 2021-07-05 22:20:57 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 7f840be56721e846a115a8833abb1751 SHA-1: 1ed9ce31e4b90b8692666823df0eb96802f80ba4 SHA-256: 7c29ff9dc99cfb9358cb651cf960ff5ac8c08f1d32b1cb28411ba653fabd8a6c
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains a lure for 'free Robux' and links to external URLs, indicating a phishing or scam attempt. The ML classifier strongly flagged this PDF as malicious, and the presence of embedded URLs further supports this assessment. While no scripts were explicitly extracted, the document's structure and content suggest it's designed to redirect users to potentially harmful sites.

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-to-get-free-robux-as-a-kid-game-hack PDF link annotation
    • http://stmb-multismart.ac.id/perpustakaan/repository/hacks-for-roblox-are-free_GM431946152.pdfIn PDF document text
    • http://stmb-multismart.ac.id/perpustakaan/repository/roblox-hacked-kids_GM431946152.pdfIn PDF document text
    • http://stmb-multismart.ac.id/perpustakaan/repository/get-free-robux-without-human-verification_GM431946152.pdfIn PDF document text
    • http://stmb-multismart.ac.id/perpustakaan/repository/roblox-get-free-robux-hack_GM431946152.pdfIn PDF document text
    • http://stmb-multismart.ac.id/perpustakaan/repository/free-robux-codes_GM431946152.pdfIn PDF document text
    • http://stmb-multismart.ac.id/perpustakaan/repository/photostar-hack-client-inject-error-roblox_GM431946152.pdfIn PDF document text
    • http://stmb-multismart.ac.id/perpustakaan/repository/get-free-robux-today_GM431946152.pdfIn PDF document text
    • http://stmb-multismart.ac.id/perpustakaan/repository/roblox-free-robux-unlimited-robux-and-tix_GM431946152.pdfIn PDF document text
    • http://stmb-multismart.ac.id/perpustakaan/repository/cheat-roblox-mac_GM431946152.pdfIn PDF document text
    • http://stmb-multismart.ac.id/perpustakaan/repository/roblox-2k-hacks_GM431946152.pdfIn PDF document text
    • http://stmb-multismart.ac.id/perpustakaan/repository/daily-spin-and-coin_GM406889139.pdfIn PDF document text
    • http://stmb-multismart.ac.id/perpustakaan/repository/coin-master-tricks_GM406889139.pdfIn PDF document text
    • http://stmb-multismart.ac.id/perpustakaan/repository/coin-master-hack-mod-apk-2021-download_GM406889139.pdfIn PDF document text
    • http://stmb-multismart.ac.id/perpustakaan/repository/robux-free-2021-hack-pc_GM431946152.pdfIn PDF document text
    • http://stmb-multismart.ac.id/perpustakaan/repository/powering-imagination-free-robux_GM431946152.pdfIn PDF document text
    • http://stmb-multismart.ac.id/perpustakaan/repository/roblox-egghunt-2021-cheat_GM431946152.pdfIn PDF document text
    • http://stmb-multismart.ac.id/perpustakaan/repository/huskybuscom-free-robux_GM431946152.pdfIn PDF document text
    • http://stmb-multismart.ac.id/perpustakaan/repository/how-to-hack-roblox-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://stmb-multismart.ac.id/perpustakaan/repository/free-robux-no-verification-on-laptop_GM431946152.pdfIn PDF document text
    • http://stmb-multismart.ac.id/perpustakaan/repository/roblox-use-the-cheats_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_off00002f8e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F8E 22028 bytes
SHA-256: 0dec5ece1716864cbd7b1ca12408eef905520faf328e2537a3f480fe56e2ce46
font_01_sfnt_off00005fc2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5FC2 19280 bytes
SHA-256: fbd482d3b42c402f31899b7174a93de7a7aa833796ffa593885741fefeb30eca

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