Malicious PDF — malware analysis report

Static analysis result for SHA-256 c9dc5ceadb7d36be…

MALICIOUS

PDF

33.0 KB Created: 2021-07-04 09:23:57 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-05
MD5: f0e16b8b702545efbc6b87c67b3aec9a SHA-1: 1236c41ae9919280e97d340358947706bc690324 SHA-256: c9dc5ceadb7d36be815ead90a52f65a4a48ac3631722230a415c87410f0e0193
82 Risk Score

Malware Insights

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

The PDF document contains a high-severity heuristic indicating it links to a 'game hack' redirector, specifically http://netcdn.tw/app/479516143/good-free-minecraft-server-hosting-game-hack. This lure, combined with the ML classifier flagging the PDF as malicious, suggests the document is designed to trick users into visiting a site that likely hosts a malicious payload. The document body, though partially garbled, contains similar URLs and text related to game hacks and generators.

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/479516143/good-free-minecraft-server-hosting-game-hack PDF link annotation
    • http://lib.smklabor.sch.id/repository/coin-master-unlimited-free-spins-link-2021_GM406889139.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/2021-roblox-accounts-free-2021_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/robux-free-generator-2021_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/robux-hack-working-2021-inspect_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/roblox-unblocked-free_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/roblox-gravity-hack_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/roblox-simon-says-cheat_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/free-random-roblox-accounts_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/assassin-dodge-hack-roblox_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/get-roebucks-com_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/earn-free-robux-for-roblox_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/roblox-hack-glitch-free-unlimited-robux_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/https-www-roblox-free-account_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/pokemon-go-free-and-switch-connect_GM1094591345.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/rbxraincom-free-robux_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/botton-complex-free-robux_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/john-doe-roblox-hacking_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/coin-master-daily-spin-free_GM406889139.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/free-jeans-roblox_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_off00002e57.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2E57 22040 bytes
SHA-256: 6d72a418eed77647ac8670f26ec9dfa41647ae3ed36fbb715316f8287267107b
font_01_sfnt_off00005e37.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5E37 18284 bytes
SHA-256: 7289302ae6250539789b9217bcc68894f0328a970bf5d67cc3f1b282cc8d95f9

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