Malicious PDF — malware analysis report

Static analysis result for SHA-256 c9c550272ab1ffec…

MALICIOUS

PDF

34.0 KB Created: 2021-06-30 05:42:50 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 2201ffe2d368aa36f25eb19e77d248c3 SHA-1: abeba7864ddc78d4ae688f73256695319e32ddee SHA-256: c9c550272ab1ffec2f36bef489df3944fc13fda222993e98ec7d0d5fbd684d50
82 Risk Score

Malware Insights

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

The PDF document contains multiple links and a lure related to game hacks, specifically for Roblox. The primary link, http://netcdn.co/app/431946152/free-acc-to-roblox-game-hack, is flagged as a redirector for a game hack. While no scripts were explicitly extracted, the PDF structure and heuristics suggest it's designed to exploit user interest in game cheats to redirect them to potentially malicious content or downloads. The ML classifier strongly indicates maliciousness.

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.co/app/431946152/free-acc-to-roblox-game-hack PDF link annotation
    • http://lib.untad.ac.id/repository/roblox-vampire-hunters-2-hack_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id//repository/free-robux-with-no-survey_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/free-robux-passtebin_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/game-toolbox_GM479516143.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/how-to-make-robux-on-roblox_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/roblox-8th-gym-hack_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/i-want-to-break-free-roblox_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/i-got-hacked-what-do-i-do-roblox_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/walk-through-walls-hack-roblox_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/free-quick-robux_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/noclip-cheat-roblox-jailbreak_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/roblox-hack-chrome-extension_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/roblox-hack-download-pc-2021_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/free-robux-havck_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/how-to-get-java-minecraft-free_GM479516143.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/free-coin-master-spins-blog_GM406889139.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/free-vip-server-roblox_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/roblox-admins-free_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/roblox-cartoony-animation-free_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/roblox-developer-console-hack_GM431946152.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_off00002fb5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2FB5 22280 bytes
SHA-256: 3222386b5eabcc1eee4b560cbaf2bb52423a74ef245169974d9a2ac2795e9312
font_01_sfnt_off00006110.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6110 18652 bytes
SHA-256: ec20a6d397c16e202470f973f8bcdd22d2cdfb7f27c1665dcc0664a063e40c2d

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