Malicious PDF — malware analysis report

Static analysis result for SHA-256 7272ab14f5f8e103…

MALICIOUS

PDF

34.9 KB Created: 2021-07-06 05:10:16 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: eb465bb779a0f521cb855ada4d723f32 SHA-1: 1768ccd5c49f71161a75c4fc173e76983edf3712 SHA-256: 7272ab14f5f8e1034169ff2f58abb3ffae0218739c02c31dced519d7f4ec3a5e
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/free-attacks-on-coin-master-game-hack PDF link annotation
    • http://katalog.gemalibrary.net/repository/blood-and-iron-hacks-roblox_GM431946152.pdfIn PDF document text
    • http://katalog.gemalibrary.net/repository/tiradas-coin-master_GM406889139.pdfIn PDF document text
    • http://katalog.gemalibrary.net/repository/free-coin-master-spins-daily_GM406889139.pdfIn PDF document text
    • http://katalog.gemalibrary.net/repository/how-do-you-get-1-million-robux-for-free_GM431946152.pdfIn PDF document text
    • http://katalog.gemalibrary.net/repository/can-you-get-minecraft-for-free-on-pc_GM479516143.pdfIn PDF document text
    • http://katalog.gemalibrary.net/repository/minecraft-noob-vs-pro-vs-hacker_GM479516143.pdfIn PDF document text
    • http://katalog.gemalibrary.net/repository/free-robux-come_GM431946152.pdfIn PDF document text
    • http://katalog.gemalibrary.net/repository/roblox-free-item-codes_GM431946152.pdfIn PDF document text
    • http://katalog.gemalibrary.net/repository/roblox-hack-me_GM431946152.pdfIn PDF document text
    • http://katalog.gemalibrary.net/repository/coin-master-daily-free-spins-link-today-2021-free_GM406889139.pdfIn PDF document text
    • http://katalog.gemalibrary.net/repository/how-to-get-free-robux-without-verifying_GM431946152.pdfIn PDF document text
    • http://katalog.gemalibrary.net/repository/free-spins-and-coins-for-coin-master-game_GM406889139.pdfIn PDF document text
    • http://katalog.gemalibrary.net/repository/how-can-you-get-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://katalog.gemalibrary.net/repository/how-to-combine-videos-on-tiktok-free_GM835599320.pdfIn PDF document text
    • http://katalog.gemalibrary.net/repository/coin-master-hack-mod-apk_GM406889139.pdfIn PDF document text
    • http://katalog.gemalibrary.net/repository/coin-master-free-coin-and-spin-app_GM406889139.pdfIn PDF document text
    • http://katalog.gemalibrary.net/repository/robux-hack-2021_GM431946152.pdfIn PDF document text
    • http://katalog.gemalibrary.net/repository/top-5-juego-hackeado-roblox_GM431946152.pdfIn PDF document text
    • http://katalog.gemalibrary.net/repository/free-draw-2-roblox_GM431946152.pdfIn PDF document text
    • http://katalog.gemalibrary.net/repository/pubg-uc-hack-season-9_GM1330123889.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_off000031a4.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x31A4 23148 bytes
SHA-256: f2dd726150709ae6a1d76c56463927435f74ab803f6d7689d5c0ab30e3c17f7c
font_01_sfnt_off00006603.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6603 18168 bytes
SHA-256: 43abfb39722ac35456cab2146e99d839ad875e13a0429ae15e438ba8c232cde3

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