Malicious PDF — malware analysis report

Static analysis result for SHA-256 e5c136a17e4ce8de…

MALICIOUS

PDF

46.8 KB Created: 2021-05-12 00:05:23 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 4114100aeac93f8367b7e9dbe1680bcb SHA-1: 30ba35a3c2d4c5a3d5700bfc4f698e82304d5417 SHA-256: e5c136a17e4ce8dec0f99ce4ff2dadc87722642bfc6b32851d6e2865da905444
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links and a heuristic firing indicating a 'free generator / game hack' lure. The primary malicious URL identified is https://netcdn.xyz/app/406889139/hack-coin-master-online-without-human-verification-game-hack. While no scripts were explicitly extracted, the nature of the lure suggests it is intended to redirect users to a site that may host further malicious content or prompt downloads. The document's content and structure strongly indicate a phishing or social engineering attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8948

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.xyz/app/406889139/hack-coin-master-online-without-human-verification-game-hack PDF link annotation
    • http://perpus.unik-kediri.ac.id/repository/roblox-free-robux_GM431946152.pdfIn PDF document text
    • http://perpus.unik-kediri.ac.id/repository/is-java-minecraft-free_GM479516143.pdfIn PDF document text
    • http://perpus.unik-kediri.ac.id/repository/roblox-hack-client_GM431946152.pdfIn PDF document text
    • http://perpus.unik-kediri.ac.id/repository/coin-master-free-link-daily_GM406889139.pdfIn PDF document text
    • http://perpus.unik-kediri.ac.id/repository/free-robux-download_GM431946152.pdfIn PDF document text
    • http://perpus.unik-kediri.ac.id/repository/free-robux-obby-2021_GM431946152.pdfIn PDF document text
    • http://perpus.unik-kediri.ac.id/repository/free-spins-and-coins-from-coin-master-game_GM406889139.pdfIn PDF document text
    • http://perpus.unik-kediri.ac.id/repository/coin-master-hack-apk-app_GM406889139.pdfIn PDF document text
    • http://perpus.unik-kediri.ac.id/repository/how-to-make-a-private-server-on-roblox-for-free_GM431946152.pdfIn PDF document text
    • http://perpus.unik-kediri.ac.id/repository/robux-free-gift-card_GM431946152.pdfIn PDF document text
    • http://perpus.unik-kediri.ac.id/repository/coin-master-free-spin-ml_GM406889139.pdfIn PDF document text
    • http://perpus.unik-kediri.ac.id/repository/minecraft-life-hacks_GM479516143.pdfIn PDF document text
    • http://perpus.unik-kediri.ac.id/repository/minecraft-pvp-hacks_GM479516143.pdfIn PDF document text
    • http://perpus.unik-kediri.ac.id/repository/roblox-fun-com-free-robux_GM431946152.pdfIn PDF document text
    • http://perpus.unik-kediri.ac.id/repository/coin-master-fan-hack_GM406889139.pdfIn PDF document text
    • http://perpus.unik-kediri.ac.id/repository/how-can-you-get-robux_GM431946152.pdfIn PDF document text
    • http://perpus.unik-kediri.ac.id/repository/free-robux-kid-friendly_GM431946152.pdfIn PDF document text
    • http://perpus.unik-kediri.ac.id/repository/free-robux-giveaway-live_GM431946152.pdfIn PDF document text
    • http://perpus.unik-kediri.ac.id/repository/coin-master-app-hacks_GM406889139.pdfIn PDF document text
    • http://perpus.unik-kediri.ac.id/repository/100-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off0000495b.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x495B 24396 bytes
SHA-256: b4bb9747a5da8dffe7ca3c8422f0b9ee4f5fae6b641ce20ad773e94332985bce
font_01_sfnt_off0000813b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x813B 7332 bytes
SHA-256: d811e0aca85f3b94c42cd1240eec68b8eb378f3d8be5e408d3f6abd0f11f834d
font_02_sfnt_off00009354.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9354 18688 bytes
SHA-256: aff6012002d7c8d1238c8ca496166b12a8d25d6fb5282892c0f4493fdd227159

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