Malicious PDF — malware analysis report

Static analysis result for SHA-256 4db725ccabc92cb9…

MALICIOUS

PDF

34.5 KB Created: 2021-07-03 12:47:39 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 7ec80acfe55b7d1e257715c87bc79048 SHA-1: e9e275dfa5d9d4f98fa0edb416b9c21278c492a7 SHA-256: 4db725ccabc92cb91370ac60104900cbc3884b5909207a7038e0587aaef9a506
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous embedded URLs and a high-severity heuristic firing for linking to a 'free generator / game hack' redirector. The document body explicitly mentions 'Free Unlimited Robux' and includes the primary malicious URL, indicating a lure for users interested in game cheats. While no scripts were extracted, the presence of malicious URLs and the lure strongly suggest a phishing or scam attempt, likely leading to further malware downloads or credential harvesting.

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/free-unlimited-robux-game-hack PDF link annotation
    • http://fkunismuh.org/perpustakaan//repository/earn-robux-online_GM431946152.pdfIn PDF document text
    • http://fkunismuh.org/perpustakaan/repository/minecraft-116-free_GM479516143.pdfIn PDF document text
    • http://fkunismuh.org/perpustakaan/repository/roblox-cheat-engine-2021-no-virus_GM431946152.pdfIn PDF document text
    • http://www.fkunismuh.org/perpustakaan/repository/coin-master-332-apk-free-download_GM406889139.pdfIn PDF document text
    • http://fkunismuh.org/perpustakaan/repository/roblox-free-draw_GM431946152.pdfIn PDF document text
    • http://www.fkunismuh.org/perpustakaan/repository/youtube-how-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://www.fkunismuh.org/perpustakaan/repository/roblox-wanted-hack-pastebin_GM431946152.pdfIn PDF document text
    • http://www.fkunismuh.org/perpustakaan/repository/free-robux-offers_GM431946152.pdfIn PDF document text
    • http://fkunismuh.org/perpustakaan/repository/free-minecraft-account-and-password-2021_GM479516143.pdfIn PDF document text
    • http://fkunismuh.org/perpustakaan/repository/coinmaster-free-spins-link_GM406889139.pdfIn PDF document text
    • http://fkunismuh.org/perpustakaan/repository/roblox36com-free-robux_GM431946152.pdfIn PDF document text
    • http://www.fkunismuh.org/perpustakaan/repository/free-everything-roblox_GM431946152.pdfIn PDF document text
    • http://fkunismuh.org/perpustakaan/repository/coin-master-free-spins-2021_GM406889139.pdfIn PDF document text
    • http://fkunismuh.org/perpustakaan//repository/get-me-free-robux_GM431946152.pdfIn PDF document text
    • http://fkunismuh.org/perpustakaan/repository/get-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://www.fkunismuh.org/perpustakaan/repository/how-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://fkunismuh.org/perpustakaan//repository/coin-master-free-spins-hack-iphone_GM406889139.pdfIn PDF document text
    • http://www.fkunismuh.org/perpustakaan/repository/how-to-use-hacks-for-hacktyper-for-roblox_GM431946152.pdfIn PDF document text
    • http://www.fkunismuh.org/perpustakaan/repository/roblox-how-to-get-everything-free-in-the-catalog-2021_GM431946152.pdfIn PDF document text
    • http://www.fkunismuh.org/perpustakaan/repository/how-to-hack-field-of-battle-roblox_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_off00002f47.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F47 22260 bytes
SHA-256: 6db2528b6b0173ddf48d0c090174864989f530f53ab9a550e31faf87878f72ca
font_01_sfnt_off0000609d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x609D 19448 bytes
SHA-256: 12d77a38f0e0ba85876dc18b9bd1565f8e493343a18f7c01086cfc654b31b3f4

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