Malicious PDF — malware analysis report

Static analysis result for SHA-256 7af219aef54185e7…

MALICIOUS

PDF

35.3 KB Created: 2021-07-04 01:08:12 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-04
MD5: a8cc05aee3d69eda832f4a535e70df2f SHA-1: 2e32f1b5503421bcde6dc82965d4effcdce0285b SHA-256: 7af219aef54185e740c47a735ce2091df2a514d0a9c1376206d5b970af07b8f3
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/moonactive-free-spins-game-hack PDF link annotation
    • http://katalog.gemalibrary.net/repository/coin-master-free-in-app-purchases_GM406889139.pdfIn PDF document text
    • http://katalog.gemalibrary.net/repository/grabpoints-robux_GM431946152.pdfIn PDF document text
    • http://katalog.gemalibrary.net/repository/free-chest-coin-master_GM406889139.pdfIn PDF document text
    • http://katalog.gemalibrary.net/repository/tiktok-free-dance_GM835599320.pdfIn PDF document text
    • http://katalog.gemalibrary.net/repository/coin-master-hack-apk-download-for-android-mobile_GM406889139.pdfIn PDF document text
    • http://katalog.gemalibrary.net/repository/coin-master-card-hack-2021_GM406889139.pdfIn PDF document text
    • http://katalog.gemalibrary.net/repository/download-hack-coin-master-apk_GM406889139.pdfIn PDF document text
    • http://katalog.gemalibrary.net/repository/coinmaster-gps-user-review-coinmaster-coin-master-hack-pagedemo-index_GM406889139.pdfIn PDF document text
    • http://katalog.gemalibrary.net/repository/how-to-get-free-hair-in-roblox-2021_GM431946152.pdfIn PDF document text
    • http://katalog.gemalibrary.net/repository/coin-master-hack-apk-ios_GM406889139.pdfIn PDF document text
    • http://katalog.gemalibrary.net/repository/hack-xp-net-coin-master_GM406889139.pdfIn PDF document text
    • http://katalog.gemalibrary.net/repository/how-to-hack-roblox-accounts-2021-easy_GM431946152.pdfIn PDF document text
    • http://katalog.gemalibrary.net/repository/withdraw-robux_GM431946152.pdfIn PDF document text
    • http://katalog.gemalibrary.net/repository/free-robux-codes-2021-not-used_GM431946152.pdfIn PDF document text
    • http://katalog.gemalibrary.net/repository/minecraft-bedrock-download_GM479516143.pdfIn PDF document text
    • http://katalog.gemalibrary.net/repository/cruise-ship-tycoon-cheats-roblox_GM431946152.pdfIn PDF document text
    • http://katalog.gemalibrary.net/repository/free-spin-app-for-coin-master_GM406889139.pdfIn PDF document text
    • http://katalog.gemalibrary.net/repository/free-robux-without-verification-2021_GM431946152.pdfIn PDF document text
    • http://katalog.gemalibrary.net/repository/coin-master-20-free-spins-link-today_GM406889139.pdfIn PDF document text
    • http://katalog.gemalibrary.net/repository/what-is-a-minecraft-client_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
stream_002_off00003253.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3253 23352 bytes
SHA-256: 33c828f79e4347570901d9c8a62f4377e7b927a4ceed8a5dc0b97b7bdee9e667
font_01_sfnt_off00006743.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6743 18288 bytes
SHA-256: 9cb413fee599b756ba85b223fa28fd67b573b4b10bafd0121ae3f2b65a066c18

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