Malicious PDF — malware analysis report

Static analysis result for SHA-256 4b10f09aa36e00dd…

MALICIOUS

PDF

47.5 KB Created: 2021-06-03 23:37:30 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-02
MD5: a18bbb512a923def7befda4fe02f8789 SHA-1: 25f8ae2c77f2e961b236885fd3c48fd0e3b1403e SHA-256: 4b10f09aa36e00ddb2a65c38df1c82e1d9a8702adb3fc335b6f2ffd596769d08
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. The file routes users through malicious redirector infrastructure and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

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/431946152/free-roblox-card-codes-game-hack PDF link annotation
    • http://perpustakaan.pn-tilamuta.go.id/repository/minecraft-hacked-client-bedrock_GM479516143.pdfIn PDF document text
    • http://perpustakaan.pn-tilamuta.go.id/repository/how-do-u-get-free-robux_GM431946152.pdfIn PDF document text
    • http://perpustakaan.pn-tilamuta.go.id/repository/minecraft-bedrock-free_GM479516143.pdfIn PDF document text
    • http://perpustakaan.pn-tilamuta.go.id/repository/free-coin-master-hack-no-verification_GM406889139.pdfIn PDF document text
    • http://perpustakaan.pn-tilamuta.go.id/repository/abd-roblox_GM431946152.pdfIn PDF document text
    • http://perpustakaan.pn-tilamuta.go.id/repository/minecraft-free-download-ios_GM479516143.pdfIn PDF document text
    • http://perpustakaan.pn-tilamuta.go.id/repository/coin-master-update-2021_GM406889139.pdfIn PDF document text
    • http://perpustakaan.pn-tilamuta.go.id/repository/free-robux-stream_GM431946152.pdfIn PDF document text
    • http://perpustakaan.pn-tilamuta.go.id/repository/free-minecraft-capes_GM479516143.pdfIn PDF document text
    • http://perpustakaan.pn-tilamuta.go.id/repository/coin-master-hack-2021-android-apk_GM406889139.pdfIn PDF document text
    • http://perpustakaan.pn-tilamuta.go.id/repository/what-is-exploiting-in-roblox_GM431946152.pdfIn PDF document text
    • http://perpustakaan.pn-tilamuta.go.id/repository/coin-free-master_GM406889139.pdfIn PDF document text
    • http://perpustakaan.pn-tilamuta.go.id/repository/best-roblox-hacks_GM431946152.pdfIn PDF document text
    • http://perpustakaan.pn-tilamuta.go.id/repository/watch-videos-for-robux_GM431946152.pdfIn PDF document text
    • http://perpustakaan.pn-tilamuta.go.id/repository/free-coin-master-cards_GM406889139.pdfIn PDF document text
    • http://perpustakaan.pn-tilamuta.go.id/repository/robuxy-com-free-robux_GM431946152.pdfIn PDF document text
    • http://perpustakaan.pn-tilamuta.go.id/repository/coin-master-hack-activegamer_GM406889139.pdfIn PDF document text
    • http://perpustakaan.pn-tilamuta.go.id/repository/how-to-get-free-robux-for-kids_GM431946152.pdfIn PDF document text
    • http://perpustakaan.pn-tilamuta.go.id/repository/whats-robux_GM431946152.pdfIn PDF document text
    • http://perpustakaan.pn-tilamuta.go.id/repository/get-free-spins-coin-master_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_004_off00004f5f.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4F5F 24048 bytes
SHA-256: adf13e0c0d8e74137bc1023afca4401e290d654d4cd9460c7c7941f1466986fa
font_01_sfnt_off00008663.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8663 6700 bytes
SHA-256: ae114634718854704d615808d33fb1b747d90eb28e420080bd5adbdfe7fb6a27
font_02_sfnt_off000096a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x96A1 18348 bytes
SHA-256: 903f306892d85e671743a110baddbe99520b28b654362b7490d4e6d268663c74

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