Malicious PDF — malware analysis report

Static analysis result for SHA-256 ca663be8c410839b…

MALICIOUS

PDF

35.2 KB Created: 2021-06-29 00:49:31 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: ea56e89436d850af6e1337c2122c639f SHA-1: 238dd6e9e5e5f45866e1e4b780fa8f4c2fd056cc SHA-256: ca663be8c410839bab6bdaffe0ea8328fcea139459a5e54c04a16ae94c241395
82 Risk Score

Malware Insights

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

The PDF document uses a lure related to free game items and hacks, as indicated by the document body and the 'PDF_GAME_HACK_REDIRECT_LURE' heuristic. It contains an embedded URI pointing to 'http://netcdn.co/app/431946152/free-roblox-outfits-2021-game-hack', which is likely a malicious redirector or downloader. The ML classifier also flagged this PDF as malicious with high confidence.

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.co/app/431946152/free-roblox-outfits-2021-game-hack PDF link annotation
    • https://perpustakaan.stifar.ac.id/repository/how-to-generate-free-coin-master-spin_GM406889139.pdfIn PDF document text
    • https://perpustakaan.stifar.ac.id/repository/roblox-ninja-legends-free-vip-server_GM431946152.pdfIn PDF document text
    • https://perpustakaan.stifar.ac.id/repository/how-to-get-free-robux-in-adopt-me_GM431946152.pdfIn PDF document text
    • https://perpustakaan.stifar.ac.id/repository/roblox-cheats-for-iphone_GM431946152.pdfIn PDF document text
    • https://perpustakaan.stifar.ac.id/repository/how-to-hack-peoples-roblox-accounts_GM431946152.pdfIn PDF document text
    • https://perpustakaan.stifar.ac.id/repository/coin-master-hack-cheat-generator-d_GM406889139.pdfIn PDF document text
    • https://perpustakaan.stifar.ac.id/repository/coin-master-hack-ios-cydia_GM406889139.pdfIn PDF document text
    • https://perpustakaan.stifar.ac.id/repository/free-spins-for-coin-masters_GM406889139.pdfIn PDF document text
    • https://perpustakaan.stifar.ac.id/repository/how-to-get-free-robux-no-human-verification-2021_GM431946152.pdfIn PDF document text
    • https://perpustakaan.stifar.ac.id/repository/how-to-start-a-minecraft-server-for-free_GM479516143.pdfIn PDF document text
    • https://perpustakaan.stifar.ac.id/repository/minecraft-free-download-chromebook_GM479516143.pdfIn PDF document text
    • https://perpustakaan.stifar.ac.id/repository/roblox-admin-hack_GM431946152.pdfIn PDF document text
    • https://perpustakaan.stifar.ac.id/repository/daily-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • https://perpustakaan.stifar.ac.id/repository/coin-master-hack-no-download_GM406889139.pdfIn PDF document text
    • https://perpustakaan.stifar.ac.id/repository/coin-master-free-in-app-purchases_GM406889139.pdfIn PDF document text
    • https://perpustakaan.stifar.ac.id/repository/island-royale-roblox-hack-script_GM431946152.pdfIn PDF document text
    • https://perpustakaan.stifar.ac.id/repository/how-to-hack-map-kat-roblox_GM431946152.pdfIn PDF document text
    • https://perpustakaan.stifar.ac.id/repository/free-minecraft-server-hosting-24-7_GM479516143.pdfIn PDF document text
    • https://perpustakaan.stifar.ac.id/repository/synapse-roblox-download-free-2021_GM431946152.pdfIn PDF document text
    • https://perpustakaan.stifar.ac.id/repository/how-to-get-rs-in-roblox-free_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_off0000302c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x302C 22900 bytes
SHA-256: c8286739fee25a212c436a05eb38b55e14c5781550e2c97ce52f4723742c56f0
font_01_sfnt_off00006335.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6335 19416 bytes
SHA-256: a242c086af701212af7b881199acd0b204cb1f7b110dba78a4069fe4bdcc1034

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