Malicious PDF — malware analysis report

Static analysis result for SHA-256 23fa50661104da53…

MALICIOUS

PDF

47.5 KB Created: 2021-06-03 12:25:54 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 467dcc43aed667a554269ecee7bbe634 SHA-1: 1f53b5222618bea6d51a76766a21799f25a76164 SHA-256: 23fa50661104da53c85f1626e6331e89d4acad914f6105e6c159afd286c083ae
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple embedded links and a high-confidence heuristic firing for a 'free generator / game hack' lure. The primary link, https://netcdn.online/app/406889139/google-coin-master-free-spins-game-hack, suggests a scam designed to trick users into visiting a malicious site. While no scripts were explicitly extracted, the PDF structure and embedded links indicate a social engineering attempt to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9769

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/google-coin-master-free-spins-game-hack PDF link annotation
    • http://perpustakaan.akper-serulingmas.ac.id/repository/coin-master-daily-free-spins-2021_GM406889139.pdfIn PDF document text
    • http://perpustakaan.akper-serulingmas.ac.id/repository/free-mojang-account-with-minecraft_GM479516143.pdfIn PDF document text
    • http://perpustakaan.akper-serulingmas.ac.id/repository/minecraft-survival-free_GM479516143.pdfIn PDF document text
    • http://perpustakaan.akper-serulingmas.ac.id/repository/coin-master-game-free_GM406889139.pdfIn PDF document text
    • http://perpustakaan.akper-serulingmas.ac.id/repository/free-robux-easy_GM431946152.pdfIn PDF document text
    • http://perpustakaan.akper-serulingmas.ac.id/repository/play-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://perpustakaan.akper-serulingmas.ac.id/repository/free-robux-human-verification_GM431946152.pdfIn PDF document text
    • http://perpustakaan.akper-serulingmas.ac.id/repository/coin-master-free-daily-spins_GM406889139.pdfIn PDF document text
    • http://perpustakaan.akper-serulingmas.ac.id/repository/how-to-hack-coin-master-apkmody_GM406889139.pdfIn PDF document text
    • http://perpustakaan.akper-serulingmas.ac.id/repository/coin-master-100-spin-hack_GM406889139.pdfIn PDF document text
    • http://perpustakaan.akper-serulingmas.ac.id/repository/rbx-hut-promo-codes_GM431946152.pdfIn PDF document text
    • http://perpustakaan.akper-serulingmas.ac.id/repository/pokemon-go-free-and-pokeball-plus_GM1094591345.pdfIn PDF document text
    • http://perpustakaan.akper-serulingmas.ac.id/repository/coin-master-hack-activegamer_GM406889139.pdfIn PDF document text
    • http://perpustakaan.akper-serulingmas.ac.id/repository/coin-master-hack-online-cheat_GM406889139.pdfIn PDF document text
    • http://perpustakaan.akper-serulingmas.ac.id/repository/free-robux-no-verification-2021_GM431946152.pdfIn PDF document text
    • http://perpustakaan.akper-serulingmas.ac.id/repository/how-to-get-roblox-premium-for-free-2021_GM431946152.pdfIn PDF document text
    • http://perpustakaan.akper-serulingmas.ac.id/repository/cmaster-club-coin-master-hack-tool_GM406889139.pdfIn PDF document text
    • http://perpustakaan.akper-serulingmas.ac.id/repository/free-minecraft-gift-codes_GM479516143.pdfIn PDF document text
    • http://perpustakaan.akper-serulingmas.ac.id/repository/script-executor-roblox-free_GM431946152.pdfIn PDF document text
    • http://perpustakaan.akper-serulingmas.ac.id/repository/how-to-get-free-robux-2021_GM431946152.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_004_off000055a2.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x55A2 24708 bytes
SHA-256: aff0e4e95cc717d9942880a8ae39a712e64cdf401d6318a604b5f57d23a5ea6b
font_01_sfnt_off00008d7f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8D7F 2840 bytes
SHA-256: 30dce2b9c1950da345d7fed8f00c38887adfa2f2ddecc31775af2315e819ac37
font_02_sfnt_off00009732.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9732 18248 bytes
SHA-256: d32188c22f9df4e49535359cc17236f14c93b7b5c7ebedc8928f30f104243849

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