Malicious PDF — malware analysis report

Static analysis result for SHA-256 a365a0312cb59fd2…

MALICIOUS

PDF

51.7 KB Created: 2021-06-03 05:33:21 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-05
MD5: ac6b883415481ee8678b94127b0a0586 SHA-1: 4601e0881a6c1f7c78dd17e728adf9e855cb5c71 SHA-256: a365a0312cb59fd2d6dbc4fded82853d4486badb210fe06010d3fd18035e5c5b
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 0.9862

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/roblox-games-that-give-you-free-robux-game-hack PDF link annotation
    • http://digilib.unbari.ac.id/repository/coinmasterfree_GM406889139.pdfIn PDF document text
    • http://digilib.unbari.ac.id/repository/coin-master-games-download-free_GM406889139.pdfIn PDF document text
    • http://digilib.unbari.ac.id/repository/mcpe-download_GM479516143.pdfIn PDF document text
    • http://digilib.unbari.ac.id/repository/free-shirt-templates-roblox_GM431946152.pdfIn PDF document text
    • http://digilib.unbari.ac.id/repository/minecraft-free-online_GM479516143.pdfIn PDF document text
    • http://digilib.unbari.ac.id/repository/install-coin-master_GM406889139.pdfIn PDF document text
    • http://digilib.unbari.ac.id/repository/coin-master-spin-hack_GM406889139.pdfIn PDF document text
    • http://digilib.unbari.ac.id/repository/coin-master-free-spin-and-coin_GM406889139.pdfIn PDF document text
    • http://digilib.unbari.ac.id/repository/free-roblox-com_GM431946152.pdfIn PDF document text
    • http://digilib.unbari.ac.id/repository/how-to-earn-robux-fast_GM431946152.pdfIn PDF document text
    • http://digilib.unbari.ac.id/repository/hey-google-how-do-you-get-free-robux_GM431946152.pdfIn PDF document text
    • http://digilib.unbari.ac.id/repository/hack-coin-master-8-ball-pool_GM406889139.pdfIn PDF document text
    • http://digilib.unbari.ac.id/repository/get-free-robux-gg_GM431946152.pdfIn PDF document text
    • http://digilib.unbari.ac.id/repository/get-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://digilib.unbari.ac.id/repository/freegames911com-coinmastertipsandcheats2021freecoinsandspins_GM406889139.pdfIn PDF document text
    • http://digilib.unbari.ac.id/repository/minecraft-pe-free-download_GM479516143.pdfIn PDF document text
    • http://digilib.unbari.ac.id/repository/free-robux-hacks-no-verification_GM431946152.pdfIn PDF document text
    • http://digilib.unbari.ac.id/repository/free-coin-master-spins-blogger_GM406889139.pdfIn PDF document text
    • http://digilib.unbari.ac.id/repository/coin-master-spin-link-free-download_GM406889139.pdfIn PDF document text
    • http://digilib.unbari.ac.id/repository/how-do-you-get-roblox-for-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
stream_004_off00005443.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5443 36872 bytes
SHA-256: 1e3bdd410de82cdba7310a38cbedd4ab56c5a6119e21b2d027d13e679ec5d365
font_01_sfnt_off0000a565.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA565 19240 bytes
SHA-256: af18d9cb6acc741702b59c78a5d378fdddaa2c6ad6fac2421576a1d1ac5dc213

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