Malicious PDF — malware analysis report

Static analysis result for SHA-256 9f20ad7aa32059e4…

MALICIOUS

PDF

34.7 KB Created: 2021-07-05 05:00:31 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 76d79221dcd0aca14ea58378b7588c99 SHA-1: c1d88c691af6d9f3317aa35adea9de7af65eb6c3 SHA-256: 9f20ad7aa32059e43a72eaa79beb4a689531363fca95a505f99fea61a3630e73
82 Risk Score

Malware Insights

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

The PDF document contains a lure related to game hacks and free currency, directing users to the URL http://netcdn.tw/app/431946152/a-lot-of-robux-game-hack. This URL is likely part of a phishing or scam campaign designed to trick users into downloading further malicious content or visiting compromised sites. The ML classifier also strongly indicated 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.tw/app/431946152/a-lot-of-robux-game-hack PDF link annotation
    • http://library.umla.ac.id/repository/free-t-shirt-roblox_GM431946152.pdfIn PDF document text
    • http://library.umla.ac.id//repository/how-to-make-robux_GM431946152.pdfIn PDF document text
    • http://library.umla.ac.id/repository/20210-free-spin-links-for-coin-master_GM406889139.pdfIn PDF document text
    • http://library.umla.ac.id/repository/tiktok-free-hearts_GM835599320.pdfIn PDF document text
    • http://library.umla.ac.id/repository/roblox-cheat-codes-for-robux-2021_GM431946152.pdfIn PDF document text
    • http://library.umla.ac.id/repository/weird-roblox_GM431946152.pdfIn PDF document text
    • http://library.umla.ac.id/repository/roblox-toy-codes-free-2021_GM431946152.pdfIn PDF document text
    • http://library.umla.ac.id/repository/new-free-money-links-coin-master_GM406889139.pdfIn PDF document text
    • http://library.umla.ac.id//repository/how-to-get-100-robux-for-free_GM431946152.pdfIn PDF document text
    • http://library.umla.ac.id//repository/tiktok-free-view-10_GM835599320.pdfIn PDF document text
    • http://library.umla.ac.id//repository/free-minecraft-for-kids_GM479516143.pdfIn PDF document text
    • http://library.umla.ac.id/repository/free-minecraft-client_GM479516143.pdfIn PDF document text
    • http://library.umla.ac.id/repository/roblox-sued_GM431946152.pdfIn PDF document text
    • http://library.umla.ac.id/repository/how-to-get-minecraft-for-free-on-xbox_GM479516143.pdfIn PDF document text
    • http://library.umla.ac.id/repository/roblox-redeem-codes-free_GM431946152.pdfIn PDF document text
    • http://library.umla.ac.id//repository/coin-master-free-spins-link-2021-today_GM406889139.pdfIn PDF document text
    • http://library.umla.ac.id/repository/coin-master-hack-no-human-verification-2021_GM406889139.pdfIn PDF document text
    • http://library.umla.ac.id//repository/how-to-get-free-robux-no-verification_GM431946152.pdfIn PDF document text
    • http://library.umla.ac.id//repository/roblox-free-robux-website_GM431946152.pdfIn PDF document text
    • http://library.umla.ac.id/repository/minecraft-112-2-hacked-client_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_off0000308e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x308E 22824 bytes
SHA-256: 8dc0d50752c70954797bdb3a0a3bf2b7365e4a2701488fa92ad113880c1cc262
font_01_sfnt_off00006383.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6383 18656 bytes
SHA-256: d04e08575e4efc43ec371b195521181e13837c014caa8c6a2ad7539eeb3e7d8e

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