Malicious PDF — malware analysis report

Static analysis result for SHA-256 e9b9c81986af7643…

MALICIOUS

PDF

49.3 KB Created: 2021-06-08 17:00:25 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 78d80c84e8a2b4e50c26b82f6bec439e SHA-1: 90fec41bf8217f369ad6e7e822750f8317bc0c76 SHA-256: e9b9c81986af764322c6f8b1e833f47561c8d73a7e9fbc985818ab0c8f99e07d
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF document contains multiple links to websites advertising game hacks and free generators, such as 'Roblox Robux Hack Mod'. The ML classifier also flagged this PDF as malicious. These findings suggest the document is a lure to redirect users to potentially harmful content or downloads.

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/roblox-robux-hack-mod-game-hack PDF link annotation
    • http://razredna-nastava.net/files/coin-master-hack-ios-no-human-verification_GM406889139.pdfIn PDF document text
    • http://razredna-nastava.net/files/hack-roblox-free-robux-pastebin_GM431946152.pdfIn PDF document text
    • https://razredna-nastava.net/files/coin-master-daily-free-spins-link-2021_GM406889139.pdfIn PDF document text
    • http://razredna-nastava.net/files/minecraft-hack-mod_GM479516143.pdfIn PDF document text
    • http://razredna-nastava.net/files/hack-coin-master-for-android_GM406889139.pdfIn PDF document text
    • http://razredna-nastava.net/files/roblox-exploit-download_GM431946152.pdfIn PDF document text
    • https://razredna-nastava.net/files/free-likes-on-tiktok_GM835599320.pdfIn PDF document text
    • http://razredna-nastava.net/files/free-money-and-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://razredna-nastava.net/files/free-minecraft-texture-packs_GM479516143.pdfIn PDF document text
    • https://razredna-nastava.net/files/pubg-uc-600-sri-lanka-price_GM1330123889.pdfIn PDF document text
    • http://razredna-nastava.net/files/free-coin-master-spins-2021_GM406889139.pdfIn PDF document text
    • https://razredna-nastava.net/files/free-spins-on-coin-master-link_GM406889139.pdfIn PDF document text
    • http://razredna-nastava.net/files/krnl-download_GM431946152.pdfIn PDF document text
    • http://razredna-nastava.net/files/how-to-get-hacks-on-roblox_GM431946152.pdfIn PDF document text
    • http://razredna-nastava.net/files/real-free-robux-generator_GM431946152.pdfIn PDF document text
    • https://razredna-nastava.net/files/get-free-spins-on-coin-master-no-human-verification_GM406889139.pdfIn PDF document text
    • https://razredna-nastava.net/files/how-to-get-free-tiktok-likes_GM835599320.pdfIn PDF document text
    • https://razredna-nastava.net/files/hack-coin-master-apk-download_GM406889139.pdfIn PDF document text
    • http://razredna-nastava.net/files/roblox-land-free-robux_GM431946152.pdfIn PDF document text
    • http://razredna-nastava.net/files/coin-master-free-spin-and-trading-group_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_off000052fa.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x52FA 28180 bytes
SHA-256: 0b74059f7dbedd596142559e292d088f71f72ecfa5259c3245677bbeddb5f824
stream_006_off00009cb5.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x9CB5 18692 bytes
SHA-256: ccd9f8643858608e0c49bd611d30201c10cdd9c9981b2b69e5226a7084b56a44
font_01_sfnt_off0000918b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x918B 3400 bytes
SHA-256: 4b3e0f36ad1e0c7e3ea5c178fd2b4f097d1e01575fc6a4101a8b520db34dfe07

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