Malicious PDF — malware analysis report

Static analysis result for SHA-256 c9d7d1dda5b551f8…

MALICIOUS

PDF

35.3 KB Created: 2021-07-05 04:36:18 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 6470bbbf691c9fb2556566ddc2a0c1e5 SHA-1: 9e4a95430719fd95cfff251d520629c1993496b2 SHA-256: c9d7d1dda5b551f8bcd357df0142c09d93c055bc02a1f2a6c45c8c2b6f063c66
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 0.9980

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 http://netcdn.tw/app/406889139/free-spin-coin-master-2021-link-game-hack PDF link annotation
    • http://digilib.stiki.ac.id/repository/odes-for-free-things-on-roblox_GM431946152.pdfIn PDF document text
    • http://digilib.stiki.ac.id/repository/como-conseguir-robux-gratis-sin-hacks-android-y-pc_GM431946152.pdfIn PDF document text
    • http://digilib.stiki.ac.id/repository/roblox-free-robux-codes_GM431946152.pdfIn PDF document text
    • http://digilib.stiki.ac.id/repository/how-to-get-free-robux-instantly_GM431946152.pdfIn PDF document text
    • http://digilib.stiki.ac.id/repository/free-robux-sites-2021_GM431946152.pdfIn PDF document text
    • http://digilib.stiki.ac.id/repository/hack-with-script-roblox-2021_GM431946152.pdfIn PDF document text
    • http://digilib.stiki.ac.id/repository/how-to-get-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • http://digilib.stiki.ac.id/repository/free-robux-glitch-on-xbox-one_GM431946152.pdfIn PDF document text
    • http://digilib.stiki.ac.id/repository/coin-master-free-spins-link-blogspot-2021_GM406889139.pdfIn PDF document text
    • http://digilib.stiki.ac.id/repository/minecraft-free-computer-game_GM479516143.pdfIn PDF document text
    • http://digilib.stiki.ac.id/repository/how-to-get-free-roebucks-in-roblox_GM431946152.pdfIn PDF document text
    • http://digilib.stiki.ac.id/repository/free-model-scanner-roblox_GM431946152.pdfIn PDF document text
    • http://digilib.stiki.ac.id/repository/krnl-download_GM431946152.pdfIn PDF document text
    • http://digilib.stiki.ac.id/repository/hack-robux_GM431946152.pdfIn PDF document text
    • http://digilib.stiki.ac.id/repository/free-black-widow-sword-roblox_GM431946152.pdfIn PDF document text
    • http://digilib.stiki.ac.id/repository/cheats-for-roblox-2021_GM431946152.pdfIn PDF document text
    • http://digilib.stiki.ac.id/repository/can-i-get-free-robux_GM431946152.pdfIn PDF document text
    • http://digilib.stiki.ac.id/repository/how-to-hack-las-vegas-roblox_GM431946152.pdfIn PDF document text
    • http://digilib.stiki.ac.id/repository/free-robux-please_GM431946152.pdfIn PDF document text
    • http://digilib.stiki.ac.id/repository/minecraft-bedrock-for-free_GM479516143.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
font_00_sfnt_off0000310e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x310E 23248 bytes
SHA-256: 95caa121efa269c377b5ebdf5a7cc6bd1dd5f9bc81152c22716d2657bdab7d67
font_01_sfnt_off000065b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x65B0 18748 bytes
SHA-256: 87551c50e6d609f3c8aae9c53aca7d1ad4c281dc834da60ceb94801aa8be48ba

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