Malicious PDF — malware analysis report

Static analysis result for SHA-256 4823c7c5bd623267…

MALICIOUS

PDF

35.4 KB Created: 2021-07-09 02:17:50 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-01
MD5: cf719c97cef99a234993b7044ec3487f SHA-1: bfce553eef5181c0f2f88bfaff8b379f7ab759c7 SHA-256: 4823c7c5bd6232676e5a0b4298f26940776a0f5b8a8ddb1d2b962593857e08bc
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. The file routes users through malicious redirector infrastructure and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

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-free-daily-spins-and-coins-game-hack PDF link annotation
    • http://perpustakaan.idia.ac.id/repository/roblox-hack-2021_GM431946152.pdfIn PDF document text
    • http://perpustakaan.idia.ac.id/repository/cheats-to-get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://perpustakaan.idia.ac.id/repository/roblox-strucid-free-skin-code_GM431946152.pdfIn PDF document text
    • http://perpustakaan.idia.ac.id/repository/coin-master-free-spins-2021-generator_GM406889139.pdfIn PDF document text
    • http://perpustakaan.idia.ac.id/repository/robux-hack-line-of-code_GM431946152.pdfIn PDF document text
    • http://perpustakaan.idia.ac.id/repository/free-robux-today_GM431946152.pdfIn PDF document text
    • http://perpustakaan.idia.ac.id/repository/how-to-get-free-robux-com_GM431946152.pdfIn PDF document text
    • http://perpustakaan.idia.ac.id/repository/roblox-avatar-free_GM431946152.pdfIn PDF document text
    • http://perpustakaan.idia.ac.id/repository/free-minecraft-java-account_GM479516143.pdfIn PDF document text
    • http://perpustakaan.idia.ac.id/repository/is-minecraft-free-on-nintendo-switch_GM479516143.pdfIn PDF document text
    • http://perpustakaan.idia.ac.id/repository/free-spins-coin-master-no-human-verification_GM406889139.pdfIn PDF document text
    • http://perpustakaan.idia.ac.id/repository/coin-master-hack-tool-v1-9-apk_GM406889139.pdfIn PDF document text
    • http://perpustakaan.idia.ac.id/repository/how-to-get-free-robux-without-downloading-anything_GM431946152.pdfIn PDF document text
    • http://perpustakaan.idia.ac.id/repository/free-roblox-characters_GM431946152.pdfIn PDF document text
    • http://perpustakaan.idia.ac.id/repository/best-way-to-get-robux_GM431946152.pdfIn PDF document text
    • http://perpustakaan.idia.ac.id/repository/coin-master-heaven-free-spins_GM406889139.pdfIn PDF document text
    • http://perpustakaan.idia.ac.id/repository/roblox-accounts-free-2021_GM431946152.pdfIn PDF document text
    • http://perpustakaan.idia.ac.id/repository/get-me-robux-for-free_GM431946152.pdfIn PDF document text
    • http://perpustakaan.idia.ac.id/repository/robux-robux_GM431946152.pdfIn PDF document text
    • http://perpustakaan.idia.ac.id/repository/hack-coin-master-apk-358_GM406889139.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
stream_002_off0000340b.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x340B 22576 bytes
SHA-256: 016818882033b5412b5c5c7b760efd05786c990df54078ffee4f3eeb3ddc7e18
font_01_sfnt_off0000663d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x663D 18772 bytes
SHA-256: f3f8fa3a6eece84f4896eed170bca3035b504aefd00cdbf459e31d86686c87b4

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