Malicious PDF — malware analysis report

Static analysis result for SHA-256 6928ff1cb018d76d…

MALICIOUS

PDF

34.4 KB Created: 2021-07-05 16:06:34 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-07
MD5: c8de2bcf1b876be7d29514e2411fc83d SHA-1: 8d0b54755b00bd8caa091625cc881a7b4fb36892 SHA-256: 6928ff1cb018d76d8b5860089f5a93cce6e8eb8dbed9ebfe793929f19f1f5932
82 Risk Score

Malware Insights

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

The PDF document contains a lure related to game hacks for Coin Master and Roblox, directing users to the URL http://netcdn.tw/app/406889139/coin-master-codes-game-hack. This heuristic strongly suggests a social engineering attack aimed at tricking users into visiting a potentially malicious site. While no scripts were extracted, the PDF structure and embedded URLs are indicative of a phishing or credential harvesting attempt, possibly leveraging an exploit for client execution.

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-codes-game-hack PDF link annotation
    • https://e-learning.man1boalemo.sch.id/__statics/gudangsoal/files/free-roblox-accounts-2021-june_GM431946152.pdfIn PDF document text
    • https://e-learning.man1boalemo.sch.id/__statics/gudangsoal/files/how-to-make-a-roblox-group-for-free_GM431946152.pdfIn PDF document text
    • https://e-learning.man1boalemo.sch.id/__statics/gudangsoal/files/free-robux-no-verification-2021_GM431946152.pdfIn PDF document text
    • https://e-learning.man1boalemo.sch.id/__statics/gudangsoal/files/coin-master-free-spins-link-today-facebook_GM406889139.pdfIn PDF document text
    • https://e-learning.man1boalemo.sch.id/__statics/gudangsoal/files/roblox-hack-codes_GM431946152.pdfIn PDF document text
    • https://e-learning.man1boalemo.sch.id/__statics/gudangsoal/files/free-robux-without-offers_GM431946152.pdfIn PDF document text
    • https://e-learning.man1boalemo.sch.id/__statics/gudangsoal/files/how-to-get-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • https://e-learning.man1boalemo.sch.id/__statics/gudangsoal/files/hacks-to-walk-through-walls-on-roblox_GM431946152.pdfIn PDF document text
    • https://e-learning.man1boalemo.sch.id/__statics/gudangsoal/files/free-robux-no-survey_GM431946152.pdfIn PDF document text
    • https://e-learning.man1boalemo.sch.id/__statics/gudangsoal/files/google-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • https://e-learning.man1boalemo.sch.id/__statics/gudangsoal/files/free-robux-obby-2021_GM431946152.pdfIn PDF document text
    • https://e-learning.man1boalemo.sch.id/__statics/gudangsoal/files/get-free-cards-coin-master_GM406889139.pdfIn PDF document text
    • https://e-learning.man1boalemo.sch.id/__statics/gudangsoal/files/roblox-arsenal-hacks-download_GM431946152.pdfIn PDF document text
    • https://e-learning.man1boalemo.sch.id/__statics/gudangsoal/files/how-to-get-800-robux-for-free_GM431946152.pdfIn PDF document text
    • https://e-learning.man1boalemo.sch.id/__statics/gudangsoal/files/get-free-robux-windows-10_GM431946152.pdfIn PDF document text
    • https://e-learning.man1boalemo.sch.id/__statics/gudangsoal/files/microsoft-free-robux_GM431946152.pdfIn PDF document text
    • https://e-learning.man1boalemo.sch.id/__statics/gudangsoal/files/coin-master-hack-https-coinms-net_GM406889139.pdfIn PDF document text
    • https://e-learning.man1boalemo.sch.id/__statics/gudangsoal/files/clients-minecraft_GM479516143.pdfIn PDF document text
    • https://e-learning.man1boalemo.sch.id/__statics/gudangsoal/files/roblox-hack-tool-2021-download_GM431946152.pdfIn PDF document text
    • https://e-learning.man1boalemo.sch.id/__statics/gudangsoal/files/roblox-free-robux-no-human-verification_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_off000030fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x30FA 22904 bytes
SHA-256: 515f9b73ec14e45b093f0ff478807a3f3912b34ca996f2712b36804d7d0f1833
font_01_sfnt_off00006459.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6459 18008 bytes
SHA-256: 9b1b8022fecd0e698345aa4518e5e5ceb9dfed4ff19bb9e19d156964a7983e20

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