Malicious PDF — malware analysis report

Static analysis result for SHA-256 47df6a2633cea409…

MALICIOUS

PDF

48.5 KB Created: 2021-06-08 21:55:43 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 1ec7784ed2ccf8d0ae8e0cf426e2f6bc SHA-1: 80888f632923b61903e4d0ec02195afce6e8270e SHA-256: 47df6a2633cea409eb94ca5f8a8ab5e2d0adfe8cec038d0eb5191646fc0ec9c8
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 0.9796

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-hats-on-roblox-2021-game-hack PDF link annotation
    • http://www.library.gkigadingserpong.org/repository/www-free-robux_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/minecraft-free-play-no-download_GM479516143.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/how-to-make-a-minecraft-server-for-free-java_GM479516143.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/minecraft-bedrock-hacks_GM479516143.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/show-me-how-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/how-to-get-minecraft-java-free_GM479516143.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/coin-master-spin-ml_GM406889139.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/how-to-scam-on-roblox_GM431946152.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/how-can-you-get-robux_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/roblox-free-login_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/how-to-get-spins-on-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/coin-master-coins-free_GM406889139.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/coin-master-hack-spins-and-coins-unlimited-free_GM406889139.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/coin-master-spins-2021_GM406889139.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/free-coin-master-spins-link_GM406889139.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/coin-master-daily-gift-free-spins-and-coins-link_GM406889139.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/coin-master-free-gift-link-2021_GM406889139.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/coin-master-free-cards-and-spin-link_GM406889139.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/can-i-get-free-robux_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/free-coin-master-spins-link_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_004_off00004e43.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4E43 27080 bytes
SHA-256: 9652f0b398d4b88327eccf88dfa8b7ffcf77f899785894807330900504a031e9
font_01_sfnt_off00008c68.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8C68 5696 bytes
SHA-256: 450e3ee45915afe13702bf1d587eb8b9ad88a8d2113419ac9f2fd116a828e139
font_02_sfnt_off0000997a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x997A 18684 bytes
SHA-256: a88b2894ab57b187c05df0d8339df91ccbaf410b8a3f84ebf5af09e5ec867f39

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