Malicious PDF — malware analysis report

Static analysis result for SHA-256 c47166ea9d0e9759…

MALICIOUS

PDF

35.0 KB Created: 2021-07-06 11:27:22 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-07
MD5: d8161981615985a747bdbfa5ef4a3057 SHA-1: ec3e356623d1eb09d4fbf9e99deab944722bd15a SHA-256: c47166ea9d0e9759bccdd57d31582780237ec8859f91ca7dc5d865255a7c99f5
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF document uses a lure related to 'free Robux' and 'game hacks' to entice users. It contains an embedded URI pointing to 'netcdn.tw', which is flagged as a malicious redirector. This suggests the document is designed to lead users to a site that will likely deliver a second-stage payload or engage in phishing. No scripts were extracted, but the overall structure and heuristics strongly indicate a malicious intent to exploit user interest in online games.

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/you-promised-my-son-free-robux-game-hack PDF link annotation
    • http://www.stttekstil.ac.id/elib/repository/hey-google-how-do-you-get-free-robux_GM431946152.pdfIn PDF document text
    • http://www.stttekstil.ac.id/elib/repository/how-to-get-gamepasses-for-free-on-roblox-2021_GM431946152.pdfIn PDF document text
    • http://www.stttekstil.ac.id/elib/repository/how-do-you-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://www.stttekstil.ac.id/elib/repository/jailbreak-roblox-hack-money_GM431946152.pdfIn PDF document text
    • http://www.stttekstil.ac.id/elib/repository/hack-piano-roblox_GM431946152.pdfIn PDF document text
    • http://www.stttekstil.ac.id/elib/repository/conquerors-3-roblox-hack-script_GM431946152.pdfIn PDF document text
    • http://www.stttekstil.ac.id/elib/repository/roblox-free-robux-website_GM431946152.pdfIn PDF document text
    • http://www.stttekstil.ac.id/elib/repository/how-to-get-free-robux-without-verifying-2021_GM431946152.pdfIn PDF document text
    • http://www.stttekstil.ac.id/elib/repository/roblox-speed-run-4-cheats_GM431946152.pdfIn PDF document text
    • http://www.stttekstil.ac.id/elib/repository/robux-how-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://www.stttekstil.ac.id/elib/repository/theme-park-tycoon-2-roblox-cheats_GM431946152.pdfIn PDF document text
    • http://www.stttekstil.ac.id/elib/repository/roblox-health-cheat_GM431946152.pdfIn PDF document text
    • http://www.stttekstil.ac.id/elib/repository/robux-hack-cydia_GM431946152.pdfIn PDF document text
    • http://www.stttekstil.ac.id/elib/repository/do-robux-generators-work_GM431946152.pdfIn PDF document text
    • http://www.stttekstil.ac.id/elib/repository/robux-money_GM431946152.pdfIn PDF document text
    • http://www.stttekstil.ac.id/elib/repository/how-to-get-free-tiktok-coins_GM835599320.pdfIn PDF document text
    • http://www.stttekstil.ac.id/elib/repository/real-free-robux-generator_GM431946152.pdfIn PDF document text
    • http://www.stttekstil.ac.id/elib/repository/how-do-you-hack-roblox-account_GM431946152.pdfIn PDF document text
    • http://www.stttekstil.ac.id/elib/repository/free-spins-for-coin-master-game_GM406889139.pdfIn PDF document text
    • http://www.stttekstil.ac.id/elib/repository/minecraft-java-edition-redeem-code-free-2021_GM479516143.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_off00002efe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2EFE 22436 bytes
SHA-256: 20de09e304773f38af5d3d43ef70b97be4e796eb7814229710566f30e7d9f24e
font_01_sfnt_off0000612a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x612A 19960 bytes
SHA-256: f29a7a7b71d38b505cc7d4cb2f72b745270787244330deb29ff722716c8b7989

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