Malicious PDF — malware analysis report

Static analysis result for SHA-256 afd31bfd1de72bc8…

MALICIOUS

PDF

35.7 KB Created: 2021-07-04 10:15:10 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-17
MD5: b19b3f77fc5f23ddc6424a2f1736be8c SHA-1: 0b98694088895f4f8bbcdd3ada6564f1f130d557 SHA-256: afd31bfd1de72bc80867085515de64e2ced7cca2b29a70a71c9011876d3ee139
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains a prominent link disguised as a 'free generator / game hack' lure, which is a common tactic for distributing malware or leading users to phishing sites. The ML classifier strongly flagged this PDF as malicious. The embedded URL points to a suspicious domain associated with game hacks, further supporting the 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-do-you-get-free-robux-game-hack PDF link annotation
    • http://library.futureuniversity.com/repository/free-minecraft-java-server_GM479516143.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/free-robux-hack-2021-iphone_GM431946152.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/green-hacked-roblox-t-shirt_GM431946152.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/minecraft-hacks-list_GM479516143.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/how-to-get-free-robux-easy-november-2021_GM431946152.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/coin-master-free-spins-cheat_GM406889139.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/coin-master-hack-online-cheat_GM406889139.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/robux-hack-no-human-verification_GM431946152.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/item-for-free-roblox_GM431946152.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/apk-mod-hack-roblox_GM431946152.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/how-to-hack-stats-in-roblox-games_GM431946152.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/roblox-mechacubes-hack_GM431946152.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/coin-master-hack-2021-app_GM406889139.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/minecraft-pocket-edition-download-free-pe-calculator_GM479516143.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/win-free-robux_GM431946152.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/muffin-combat-hack-roblox-pastebin_GM431946152.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/roblox-infinity-rpg-cheat-codes_GM431946152.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/project-pokemon-roblox-hack_GM431946152.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/minecraft-skins-download-free_GM479516143.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/coin-master-apk-mod-hack-download_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_off00003240.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3240 22896 bytes
SHA-256: c8ad70e184d591e10d90ca2fd60b5a87bd9b64fc1dc6370e85c715fd2da5d912
font_01_sfnt_off0000658f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x658F 19316 bytes
SHA-256: 99209f55b8a3eadb57fc79f11dd938dc70b993b67b3cdd4e22b37a6312af6b20

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