Malicious PDF — malware analysis report

Static analysis result for SHA-256 9047c0ace7afc148…

MALICIOUS

PDF

51.0 KB Created: 2021-06-11 01:18:34 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 18edfe7f689a49c038bc6c7fd86503b0 SHA-1: ab11510a798dc3949a16e21de7fee6b068a4135d SHA-256: 9047c0ace7afc148efccc23b9bc14c11d07d46b8536921880c7e689dcbe53be5
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 0.9724

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.tw/app/431946152/free-robux-roblox-hack-no-survey-no-human-verification-2021-game-hack PDF link annotation
    • http://pustaka.fti.unand.ac.id//repository/roblox-girl-avatar_GM431946152.pdfIn PDF document text
    • http://pustaka.fti.unand.ac.id//repository/robux-free-c_GM431946152.pdfIn PDF document text
    • http://pustaka.fti.unand.ac.id/repository/free-coin-master-spins-and-coins_GM406889139.pdfIn PDF document text
    • http://pustaka.fti.unand.ac.id/repository/coin-master-online_GM406889139.pdfIn PDF document text
    • http://pustaka.fti.unand.ac.id/repository/free-robux-codez-apk_GM431946152.pdfIn PDF document text
    • http://pustaka.fti.unand.ac.id//repository/free-robux-promo-codes-2021_GM431946152.pdfIn PDF document text
    • http://pustaka.fti.unand.ac.id/repository/free-spin-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://pustaka.fti.unand.ac.id//repository/coin-master-hack-spins-free_GM406889139.pdfIn PDF document text
    • http://pustaka.fti.unand.ac.id//repository/coin-master-free-spins-daily-2021_GM406889139.pdfIn PDF document text
    • http://pustaka.fti.unand.ac.id//repository/how-do-you-get-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://pustaka.fti.unand.ac.id//repository/free-roblox-app_GM431946152.pdfIn PDF document text
    • http://pustaka.fti.unand.ac.id/repository/roblox-money-cheat-code_GM431946152.pdfIn PDF document text
    • http://pustaka.fti.unand.ac.id//repository/coin-master-hack-without-verification-code_GM406889139.pdfIn PDF document text
    • http://pustaka.fti.unand.ac.id/repository/minecraft-net-free_GM479516143.pdfIn PDF document text
    • http://pustaka.fti.unand.ac.id//repository/coin-master-hack-without-verification-2021_GM406889139.pdfIn PDF document text
    • http://pustaka.fti.unand.ac.id/repository/cm-free-spin-link-today_GM406889139.pdfIn PDF document text
    • http://pustaka.fti.unand.ac.id/repository/free-tiktok-invitation-template_GM835599320.pdfIn PDF document text
    • http://pustaka.fti.unand.ac.id/repository/daily-spin-and-coin_GM406889139.pdfIn PDF document text
    • http://pustaka.fti.unand.ac.id/repository/free-robux-ad_GM431946152.pdfIn PDF document text
    • http://pustaka.fti.unand.ac.id/repository/free-hair-in-roblox-not-model_GM431946152.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_004_off00005336.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5336 27452 bytes
SHA-256: c1557d66bc4bbea966e3ae7b4ea73d42883c041d3cc7ae3eb2dd8edf4f025544
font_01_sfnt_off00009347.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9347 5696 bytes
SHA-256: 450e3ee45915afe13702bf1d587eb8b9ad88a8d2113419ac9f2fd116a828e139
font_02_sfnt_off0000a059.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA059 19800 bytes
SHA-256: 59d64399b2e38a9a2c05a3b067fb9e9142bd2dce40ff908544c79588589ee06b

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