Malicious PDF — malware analysis report

Static analysis result for SHA-256 8a2c3335552e415b…

MALICIOUS

PDF

43.5 KB Created: 2021-05-10 17:07:15 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 2439f0fc48ec139b3d60771ad2da74a2 SHA-1: bf1636ff7255e4599e63ee07a4572cbbfdd40e0d SHA-256: 8a2c3335552e415b00519907002e2f3c2fc3a4b948850efcaa47e0abc6d13e3e
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 0.9648

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/406889139/coin-master-free-fire-game-hack PDF link annotation
    • http://repository.unla.ac.id/repository/how-to-hack-people-on-roblox_GM431946152.pdfIn PDF document text
    • http://repository.unla.ac.id/repository/how-you-get-robux_GM431946152.pdfIn PDF document text
    • http://repository.unla.ac.id/repository/coin-master-claim-spins_GM406889139.pdfIn PDF document text
    • http://repository.unla.ac.id/repository/coin-master-hack-pro-gamers-com_GM406889139.pdfIn PDF document text
    • http://repository.unla.ac.id/repository/minecraft-pe-hack-client-ios_GM479516143.pdfIn PDF document text
    • http://repository.unla.ac.id/repository/coin-master-free-spins-coins_GM406889139.pdfIn PDF document text
    • http://repository.unla.ac.id/repository/free-coins-for-flip-master-online_GM406889139.pdfIn PDF document text
    • http://repository.unla.ac.id/repository/robux-free-robux_GM431946152.pdfIn PDF document text
    • http://repository.unla.ac.id/repository/free-minecraft-for-kids_GM479516143.pdfIn PDF document text
    • http://repository.unla.ac.id/repository/coin-master-hack-apk-2021_GM406889139.pdfIn PDF document text
    • http://repository.unla.ac.id/repository/daily-spin-and-coin_GM406889139.pdfIn PDF document text
    • http://repository.unla.ac.id/repository/easy-robux-com_GM431946152.pdfIn PDF document text
    • http://repository.unla.ac.id/repository/www-rubux_GM431946152.pdfIn PDF document text
    • http://repository.unla.ac.id/repository/can-you-really-hack-coin-master-ios_GM406889139.pdfIn PDF document text
    • http://repository.unla.ac.id/repository/minecraft-free-install_GM479516143.pdfIn PDF document text
    • http://repository.unla.ac.id/repository/coin-master-hack-injection_GM406889139.pdfIn PDF document text
    • http://repository.unla.ac.id/repository/coin-master-free-spin-redeem-code_GM406889139.pdfIn PDF document text
    • http://repository.unla.ac.id/repository/free-roblox-accounts-2021_GM431946152.pdfIn PDF document text
    • http://repository.unla.ac.id/repository/how-to-hack-a-minecraft-server_GM479516143.pdfIn PDF document text
    • http://repository.unla.ac.id/repository/coin-master-free-spins-link-hack_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_off000048d5.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x48D5 23900 bytes
SHA-256: 9bc214857fe5edd5912d4ab86e105e27c938fc489b4fd08fc0b0aa0f304cf8de
font_01_sfnt_off00007f38.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7F38 2880 bytes
SHA-256: 10d025f04f706eb71cdda4f99784df1b9ccb52e48080e43095e0398eaef6f132
font_02_sfnt_off00008923.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8923 17712 bytes
SHA-256: 0afd6f2792edb83b7f2a0201a1e0a5eb12ca81ad868fb3e42742340ee6e5fb0e

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