Malicious PDF — malware analysis report

Static analysis result for SHA-256 61c4935c5f584c6d…

MALICIOUS

PDF

45.6 KB Created: 2021-06-03 23:19:36 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-07
MD5: cd4b92ce6a4ac5714a4e84f66213f8f6 SHA-1: 19a06b273b85586937aada8ae6e61076c956bac3 SHA-256: 61c4935c5f584c6d21170c7bb2c609221d66ff9b51ef3fd99610f167977d0323
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF document contains multiple links that are disguised as game hacks or generators for popular mobile games. The primary link, 'https://netcdn.online/app/406889139/coin-master-mod-free-download-game-hack', is identified as a lure for game hacks. This suggests a social engineering tactic to trick users into visiting a potentially malicious site. No scripts were extracted, but the presence of numerous game-related lures and the ML classifier's high confidence indicate a malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9864

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-mod-free-download-game-hack PDF link annotation
    • https://perpustakaan.stami.ac.id/repository/hack-coin-master-using-cheat-engine_GM406889139.pdfIn PDF document text
    • https://perpustakaan.stami.ac.id//repository/master-coin-hack-app_GM406889139.pdfIn PDF document text
    • https://perpustakaan.stami.ac.id/repository/tiktok-free-likes-trick_GM835599320.pdfIn PDF document text
    • https://perpustakaan.stami.ac.id/repository/oprewards-free-robux_GM431946152.pdfIn PDF document text
    • https://perpustakaan.stami.ac.id/repository/free-robux-codes_GM431946152.pdfIn PDF document text
    • https://perpustakaan.stami.ac.id/repository/coin-master-gift-link-hack_GM406889139.pdfIn PDF document text
    • https://perpustakaan.stami.ac.id/repository/free-coin-master-spins-2021_GM406889139.pdfIn PDF document text
    • https://perpustakaan.stami.ac.id/repository/robux-cheat_GM431946152.pdfIn PDF document text
    • https://perpustakaan.stami.ac.id//repository/100-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • https://perpustakaan.stami.ac.id/repository/coin-master-free-spins-link-hack_GM406889139.pdfIn PDF document text
    • https://perpustakaan.stami.ac.id//repository/free-roblox-hair-girl_GM431946152.pdfIn PDF document text
    • https://perpustakaan.stami.ac.id//repository/pokemon-go-free-shiny-celebi_GM1094591345.pdfIn PDF document text
    • https://perpustakaan.stami.ac.id//repository/free-robux-generator-2021-no-human-verification_GM431946152.pdfIn PDF document text
    • https://perpustakaan.stami.ac.id/repository/free-spins-coins-coin-master_GM406889139.pdfIn PDF document text
    • https://perpustakaan.stami.ac.id/repository/coin-master-daily-free-spins-2021_GM406889139.pdfIn PDF document text
    • https://perpustakaan.stami.ac.id/repository/buy-robux-free_GM431946152.pdfIn PDF document text
    • https://perpustakaan.stami.ac.id//repository/free-robux-without-verification-or-survey_GM431946152.pdfIn PDF document text
    • https://perpustakaan.stami.ac.id//repository/free-roblox-premium_GM431946152.pdfIn PDF document text
    • https://perpustakaan.stami.ac.id//repository/today-free-spin-coin-master_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_004_off00004e4b.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4E4B 29088 bytes
SHA-256: 33ffad6b616b56dd173123728560d65490c56e35a8fee3ee54851967784575b6
font_01_sfnt_off00008fa8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8FA8 18292 bytes
SHA-256: df3d00f786f79046a7b02f352eafccbddd11185eddbe203132848a1a76bb74a4

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