Malicious PDF — malware analysis report

Static analysis result for SHA-256 c4c24fbfc4489ae5…

MALICIOUS

PDF

44.1 KB Created: 2021-06-03 12:15:09 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 8b421fadfd2d4fa52f4d095f2c634050 SHA-1: d3ab2fc8f11776d0a8f2b3ef9f8135e3aa731e69 SHA-256: c4c24fbfc4489ae5088311064210e9bbe58bb00df4e1565e89db41c8589edf62
82 Risk Score

Malware Insights

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

The PDF document contains a lure related to game hacks, specifically for Roblox, directing users to a malicious URL. The presence of embedded URLs and the ML classifier's high confidence score indicate a malicious intent to redirect users to potentially harmful content. While no scripts were explicitly extracted, the PDF structure and embedded links suggest an attempt to exploit user interest in game cheats to lead them to a malicious site, likely for further payload delivery or phishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

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/431946152/hack-roblox-players-game-hack PDF link annotation
    • http://perpustakaan.pa-dompu.go.id/repository/coin-master-free-daily-rewards_GM406889139.pdfIn PDF document text
    • http://perpustakaan.pa-dompu.go.id/repository/free-coin-master-s_GM406889139.pdfIn PDF document text
    • http://perpustakaan.pa-dompu.go.id//repository/robux-hack-2021_GM431946152.pdfIn PDF document text
    • http://perpustakaan.pa-dompu.go.id/repository/minecraft-app-free-download_GM479516143.pdfIn PDF document text
    • http://perpustakaan.pa-dompu.go.id/repository/free-robux-exe_GM431946152.pdfIn PDF document text
    • http://perpustakaan.pa-dompu.go.id/repository/claim-free-robux_GM431946152.pdfIn PDF document text
    • http://perpustakaan.pa-dompu.go.id/repository/2021-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://perpustakaan.pa-dompu.go.id/repository/minecraft-free-download_GM479516143.pdfIn PDF document text
    • http://perpustakaan.pa-dompu.go.id//repository/bux-free-robux_GM431946152.pdfIn PDF document text
    • http://perpustakaan.pa-dompu.go.id//repository/minecraft-apk-114_GM479516143.pdfIn PDF document text
    • http://perpustakaan.pa-dompu.go.id//repository/coin-master-hack-pc-2021_GM406889139.pdfIn PDF document text
    • http://perpustakaan.pa-dompu.go.id/repository/free-roblox-gift-card_GM431946152.pdfIn PDF document text
    • http://perpustakaan.pa-dompu.go.id//repository/coin-master-link-daily-get-free-spins-amp_GM406889139.pdfIn PDF document text
    • http://perpustakaan.pa-dompu.go.id//repository/minecraft-packs-free_GM479516143.pdfIn PDF document text
    • http://perpustakaan.pa-dompu.go.id/repository/coin-master-free-codes_GM406889139.pdfIn PDF document text
    • http://perpustakaan.pa-dompu.go.id//repository/coin-master-hack-cheat-generator-d_GM406889139.pdfIn PDF document text
    • http://perpustakaan.pa-dompu.go.id/repository/coin-master-free-coins-and-spins-online-tool_GM406889139.pdfIn PDF document text
    • http://perpustakaan.pa-dompu.go.id/repository/free-minecraft-skins-girl_GM479516143.pdfIn PDF document text
    • http://perpustakaan.pa-dompu.go.id//repository/free-coins-and-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://perpustakaan.pa-dompu.go.id//repository/www-robux_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
stream_004_off00004ccd.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4CCD 26448 bytes
SHA-256: 16df4a4035638e84e1c74f0c45caff6a7a8cfbe15f21a4b3f0622a80f0d4390e
font_01_sfnt_off000088b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x88B5 18516 bytes
SHA-256: 90bd1aee5c470a37d92cc59b0941c0b496151a5f4b07a4ca4aaf8cbf88ee13c9

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