Malicious PDF — malware analysis report

Static analysis result for SHA-256 c63b58dd0fa23733…

MALICIOUS

PDF

46.9 KB Created: 2021-06-03 05:22:58 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 28607d8c944cdbd4c92f604e0cd7b344 SHA-1: 88d020ba1458c00235da72c6f37e917f6a44ffa4 SHA-256: c63b58dd0fa2373372982c69766cb3f500a3507edf33d785085251b7ed837f84
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 0.9832

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/479516143/minecraft-free-download-android-apk-game-hack PDF link annotation
    • https://lib.unitri.ac.id/repository/coin-master-free-spins-cheat-codes_GM406889139.pdfIn PDF document text
    • https://lib.unitri.ac.id//repository/hack-coin-master-free_GM406889139.pdfIn PDF document text
    • https://lib.unitri.ac.id/repository/free-robux-no-human-verification-or-survey-2021_GM431946152.pdfIn PDF document text
    • https://lib.unitri.ac.id/repository/coin-master-spins-hack-2021_GM406889139.pdfIn PDF document text
    • https://lib.unitri.ac.id//repository/coin-master-2021-free-spins-link-2021_GM406889139.pdfIn PDF document text
    • https://lib.unitri.ac.id//repository/coin-master-free-spins-link-today-haktuts_GM406889139.pdfIn PDF document text
    • https://lib.unitri.ac.id//repository/100-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://lib.unitri.ac.id/repository/cool-free-minecraft-skins_GM479516143.pdfIn PDF document text
    • https://lib.unitri.ac.id/repository/free-robux-com-real_GM431946152.pdfIn PDF document text
    • https://lib.unitri.ac.id/repository/minecraft-coins-free_GM479516143.pdfIn PDF document text
    • https://lib.unitri.ac.id/repository/coin-master-free-spins-link-download-ios_GM406889139.pdfIn PDF document text
    • https://lib.unitri.ac.id/repository/minecraft-bedrock-for-free_GM479516143.pdfIn PDF document text
    • https://lib.unitri.ac.id//repository/roblox-zone-free-robux_GM431946152.pdfIn PDF document text
    • https://lib.unitri.ac.id/repository/coin-master-hack-activegamer_GM406889139.pdfIn PDF document text
    • https://lib.unitri.ac.id//repository/daily-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://lib.unitri.ac.id/repository/minecraft-redeem-code-free-2021_GM479516143.pdfIn PDF document text
    • https://lib.unitri.ac.id//repository/free-coin-master-spin-app_GM406889139.pdfIn PDF document text
    • https://lib.unitri.ac.id/repository/blox-fish-free-robux_GM431946152.pdfIn PDF document text
    • https://lib.unitri.ac.id/repository/roblox-catalog-free_GM431946152.pdfIn PDF document text
    • https://lib.unitri.ac.id/repository/coin-master-cards-hack-2021_GM406889139.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_off0000512f.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x512F 29992 bytes
SHA-256: ee346dd3635459b02e1e364c5352970ac484b7b0f81904c2e985a51f3d5f5b40
font_01_sfnt_off000093e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x93E3 18636 bytes
SHA-256: 653028bcb0f2fb6608854d40a7a9db9360db480d39b3fa53a0b8dd523b133d01

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