Malicious PDF — malware analysis report

Static analysis result for SHA-256 4a5c3c5105d172a2…

MALICIOUS

PDF

42.2 KB Created: 2021-06-03 07:44:41 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 46675696cb4b12c55238b59672db18c9 SHA-1: 8158e00c3174092f7ed75c873b71863426aa3a20 SHA-256: 4a5c3c5105d172a23428ef9a9ba2e1d7a2b6967e782cdcfdd6bcb23d85380e91
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 0.9874

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 https://netcdn.online/app/406889139/coin-master-hack-ios-game-hack PDF link annotation
    • http://lib.smklabor.sch.id/repository/bux-gg-robux-free_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/coin-master-firebird-card-free_GM406889139.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/hack-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/minecraft-net-free_GM479516143.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/cool-free-minecraft-skins_GM479516143.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/coin-master-free-daily-spins-and-coins_GM406889139.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/coin-master-hack-link_GM406889139.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/free-robux-sites-2021_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/coin-master-32-hack-apk_GM406889139.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/coin-master-fan-page-free-spins_GM406889139.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/coin-master-sound-daily-free-spins-link-today_GM406889139.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/coin-master-hack-ios-2021_GM406889139.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/how-to-hack-roblox_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/how-to-get-minecraft-for-free-on-tablet_GM479516143.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/how-do-you-get-roblox-for-free_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/how-to-win-robux_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/how-do-u-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/roblox-executor-free_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/free-robux-codes_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/hacks-for-minecraft-bedrock_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
stream_004_off00004c84.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4C84 24296 bytes
SHA-256: a4cbb586bb6c617cdb8b9e7eca629c8cbf1fc63c996e1ec78b80c70b1dd4b306
font_01_sfnt_off000083cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x83CB 17716 bytes
SHA-256: f14a452be4bd6a27c97c5694f50181d046bde25c51ddd7c6d3828a8a13811213

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