Malicious PDF — malware analysis report

Static analysis result for SHA-256 fc4a6aae6ba2d324…

MALICIOUS

PDF

34.3 KB Created: 2021-07-04 21:00:39 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 81a7c2fc1a6afd6c73d86da2439687c0 SHA-1: aae8323d8ce16faaf79070c8d95273c082f5c28f SHA-256: fc4a6aae6ba2d3241ec3d8a59872ef3be9b4120a696426347f72ddf7b0fe5ddd
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/431946152/free-roblox-items-codes-game-hack PDF link annotation
    • http://perpus.masda.ac.id/repository/where-tiktok-free-views-app_GM835599320.pdfIn PDF document text
    • http://perpus.masda.ac.id//repository/free-coins-and-spins-for-coin-master-game_GM406889139.pdfIn PDF document text
    • http://perpus.masda.ac.id//repository/classic-minecraft-net-hacks_GM479516143.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/minecraft-hacked-client-18_GM479516143.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/coin-master-free-coins-and-spins-link-today_GM406889139.pdfIn PDF document text
    • http://perpus.masda.ac.id//repository/free-coin-master-coins-and-spins_GM406889139.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/free-bc-roblox-accounts-2021_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/coin-master-hack-spins-apk_GM406889139.pdfIn PDF document text
    • http://perpus.masda.ac.id//repository/roblox-arsenal-hack-script-pastebin_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/roblox-promocodes-2021-free_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/roblox-boombox-backpack-free_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id//repository/roblox-free-body_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/free-items-roblox-2021-list_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/wurst-115-2_GM479516143.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/roblox-hack-robux-2021_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/cm-daily-spins_GM406889139.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/free-robux-no-verification-2021-ios_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/how-to-get-free-robux-on-roblox-app_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/how-to-get-free-spins-on-coin-master-2021-ios_GM406889139.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/www-roblox-com-free-robux_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
font_00_sfnt_off00002e1b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2E1B 22492 bytes
SHA-256: 2f6f213a987e07b10affec562bf2b2ccf21ebc6a04c747057db217bb490b50f2
font_01_sfnt_off0000607d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x607D 19188 bytes
SHA-256: 4003ae6c2c61d157c6fbcb261b5d9770f0960498668205d50da1a534c36fcdd3

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