Malicious PDF — malware analysis report

Static analysis result for SHA-256 231b7d4a80ea9ee8…

MALICIOUS

PDF

35.1 KB Created: 2021-07-09 06:24:11 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-05
MD5: f9b675f7451d667ea6e7271b3040f727 SHA-1: 7240cdeb97d90b56c5bdf2c33bf7b0650f44242d SHA-256: 231b7d4a80ea9ee8f35e9e34fe28ca5c2da21c5b744177088a7104647e072c26
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a lure related to 'game hacks' and 'free generators', directing users to a suspicious URL. The ML classifier strongly flagged this PDF as malicious, and multiple heuristics indicate it's designed to redirect users to potentially harmful content. No scripts were extracted, but the embedded URLs are the primary indicators of malicious intent.

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/431946152/how-to-sue-roblox-game-hack PDF link annotation
    • http://digilib.iailm.ac.id/repository/minecraft-hack-2021_GM479516143.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/make-group-free-roblox_GM431946152.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/free-spins-coin-master-app_GM406889139.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/minecraft-free-download-linux_GM479516143.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/roblox-how-to-get-robux-hack-2021_GM431946152.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/roblox-free-robux-codes-2021_GM431946152.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/roblox-hack-generaort-hack-accounts_GM431946152.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/free-coin-master-spins-links-2021_GM406889139.pdfIn PDF document text
    • http://digilib.iailm.ac.id//repository/coin-master-for-pc-free-download_GM406889139.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/robux-prices_GM431946152.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/roblox-hack-no-human-verification-2021-ios_GM431946152.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/where-to-get-robux_GM431946152.pdfIn PDF document text
    • http://digilib.iailm.ac.id//repository/coin-master-free-spins-link-no-verification-2021_GM406889139.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/hack-for-roblox-jailbreak-noclip_GM431946152.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/funny-roblox-avatar-free_GM431946152.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/is-there-a-way-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/how-to-play-minecraft-online-for-free_GM479516143.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/free-xbox-360-gamertags-on-roblox_GM431946152.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/roblox-cheat-engine-bypass-july-2021_GM431946152.pdfIn PDF document text
    • http://digilib.iailm.ac.id//repository/coin-master-free-spins-coins_GM406889139.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
font_00_sfnt_off00003324.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3324 22268 bytes
SHA-256: 0bb1c92243740abc63ba11c6bd84224335fe723e9c9400bea7dcf3e2bf469ccf
font_01_sfnt_off000064b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x64B8 18788 bytes
SHA-256: 80b12915c33367b68fe221f0fa1a1fc917b12b464805dde29cb17cb2b73c3613

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