Malicious PDF — malware analysis report

Static analysis result for SHA-256 a4fcb760b02008b6…

MALICIOUS

PDF

45.0 KB Created: 2021-05-19 23:30:29 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: b2b9c3998f76ec9034adb703cc04a6e8 SHA-1: bc020de04dc890cd20c1f810345116e28d6e2199 SHA-256: a4fcb760b02008b60049a0ca4f528f2b8cd803a4f2870873b8b206ae77f4fe42
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a high-confidence heuristic indicating it links to a game hack lure. The document body and embedded URLs reinforce this, pointing to sites offering 'free generators' or 'hacks' for popular games. While no scripts were extracted, the primary malicious action appears to be redirecting the user to a potentially malicious URL for further exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9632

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/1094591345/pokemon-go-free-walk-android-game-hack PDF link annotation
    • https://pt-mataram.go.id/perpustakaan/repository/coin-master-daily-free-spin-app_GM406889139.pdfIn PDF document text
    • https://pt-mataram.go.id/perpustakaan/repository/how-to-make-free-robux_GM431946152.pdfIn PDF document text
    • https://pt-mataram.go.id/perpustakaan/repository/free-robux-please_GM431946152.pdfIn PDF document text
    • https://pt-mataram.go.id/perpustakaan/repository/free-coin-master-spins-hack_GM406889139.pdfIn PDF document text
    • https://pt-mataram.go.id/perpustakaan/repository/roblox-hackprogamers-com_GM431946152.pdfIn PDF document text
    • https://pt-mataram.go.id/perpustakaan/repository/how-to-get-free-robux-without-verification-or-surveys_GM431946152.pdfIn PDF document text
    • https://pt-mataram.go.id/perpustakaan/repository/blox-land-free-robux_GM431946152.pdfIn PDF document text
    • https://pt-mataram.go.id/perpustakaan/repository/earn-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • https://pt-mataram.go.id/perpustakaan/repository/http-bit-ly-coin-master-hack_GM406889139.pdfIn PDF document text
    • https://pt-mataram.go.id/perpustakaan/repository/how-can-i-get-minecraft-for-free_GM479516143.pdfIn PDF document text
    • https://pt-mataram.go.id/perpustakaan/repository/coin-master-heaven-free-spins_GM406889139.pdfIn PDF document text
    • https://pt-mataram.go.id/perpustakaan/repository/how-can-i-get-free-robux_GM431946152.pdfIn PDF document text
    • https://pt-mataram.go.id/perpustakaan/repository/bux-free-robux_GM431946152.pdfIn PDF document text
    • https://pt-mataram.go.id/perpustakaan/repository/minecraft-pe-hack-client-ios_GM479516143.pdfIn PDF document text
    • https://pt-mataram.go.id/perpustakaan/repository/free-robux-cards_GM431946152.pdfIn PDF document text
    • https://pt-mataram.go.id/perpustakaan/repository/download-coin-master-free-spins-link-2021-today_GM406889139.pdfIn PDF document text
    • https://pt-mataram.go.id/perpustakaan/repository/free-robux-legit_GM431946152.pdfIn PDF document text
    • https://pt-mataram.go.id/perpustakaan/repository/earn-free-robux-today_GM431946152.pdfIn PDF document text
    • https://pt-mataram.go.id/perpustakaan/repository/to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://pt-mataram.go.id/perpustakaan/repository/blogger-free-spins-and-coins_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_off00004a53.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4A53 24572 bytes
SHA-256: 129d52062d2d15b632d393c28f555fa558068814d9c499d4c636653e9020d5ba
font_01_sfnt_off000082cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x82CB 2840 bytes
SHA-256: 3fb127b764b9d10f5525bc4de5ec8316de704409ccb0cf21cff3ad8a30d11676
font_02_sfnt_off00008c7d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8C7D 18636 bytes
SHA-256: 1cc26509abb5b3bc2f18d0acc750e6d7ded393a74c47fd1a1d498644daf7bf8b

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