Malicious PDF — malware analysis report

Static analysis result for SHA-256 5205a7f8cd6367dc…

MALICIOUS

PDF

33.9 KB Created: 2021-07-04 00:02:06 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 611271c90802d53f8f14886cc9be5c45 SHA-1: 753152f967396a805a3018fc516c327eacdd34d1 SHA-256: 5205a7f8cd6367dce9275eb4cbfbed91d69143242446c3cec76971d69948a5e0
82 Risk Score

Malware Insights

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

The PDF document contains multiple links that are identified as lures for game hacks and free in-game currency. The primary link, http://netcdn.tw/app/406889139/coin-master-free-spin-and-coins-links-2021-game-hack, is specifically flagged as a game hack redirector. This suggests the document's purpose is to trick users into visiting malicious sites, likely for credential harvesting or to initiate further malware downloads.

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/406889139/coin-master-free-spin-and-coins-links-2021-game-hack PDF link annotation
    • http://library.sdkmaterdei.sch.id/repository/how-to-hack-free-robux-websites_GM431946152.pdfIn PDF document text
    • http://library.sdkmaterdei.sch.id/repository/clothing-advertisement-roblox-template-free_GM431946152.pdfIn PDF document text
    • http://library.sdkmaterdei.sch.id/repository/commen-robux-free_GM431946152.pdfIn PDF document text
    • http://library.sdkmaterdei.sch.id/repository/roblox-administrator-badge-hack-2021_GM431946152.pdfIn PDF document text
    • http://library.sdkmaterdei.sch.id/repository/how-to-get-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • http://library.sdkmaterdei.sch.id/repository/haktuts-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://library.sdkmaterdei.sch.id/repository/free-money-codes-roblox_GM431946152.pdfIn PDF document text
    • http://library.sdkmaterdei.sch.id/repository/hacking-roblox-accounts-real-way-2021_GM431946152.pdfIn PDF document text
    • http://library.sdkmaterdei.sch.id/repository/roblox-free-robux-hack_GM431946152.pdfIn PDF document text
    • http://library.sdkmaterdei.sch.id/repository/codes-for-2021-november-for-free-robux_GM431946152.pdfIn PDF document text
    • http://library.sdkmaterdei.sch.id/repository/i-hacked-my-haters-roblox-account_GM431946152.pdfIn PDF document text
    • http://library.sdkmaterdei.sch.id/repository/roblox-group-rank-hack_GM431946152.pdfIn PDF document text
    • http://library.sdkmaterdei.sch.id/repository/how-to-get-free-avartar-shings-on-roblox_GM431946152.pdfIn PDF document text
    • http://library.sdkmaterdei.sch.id/repository/hack-para-dragon-ball-super-heroes-roblox_GM431946152.pdfIn PDF document text
    • http://library.sdkmaterdei.sch.id/repository/roblox-free-robux-generator_GM431946152.pdfIn PDF document text
    • http://library.sdkmaterdei.sch.id/repository/roblox-hack-for-scripts_GM431946152.pdfIn PDF document text
    • http://library.sdkmaterdei.sch.id/repository/how-to-hack-filter-games-roblox_GM431946152.pdfIn PDF document text
    • http://library.sdkmaterdei.sch.id/repository/roblox-hackclub-2021_GM431946152.pdfIn PDF document text
    • http://library.sdkmaterdei.sch.id/repository/how-to-change-my-roblox-name-for-free_GM431946152.pdfIn PDF document text
    • http://library.sdkmaterdei.sch.id/repository/free-spins-coin-master-2021_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
stream_002_off00002e00.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x2E00 22320 bytes
SHA-256: 4b47ff1ea858116b2e969821c3685e4d3c9c95ad2f7da72534ae7d25681b9b12
font_01_sfnt_off00005fb3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5FB3 18920 bytes
SHA-256: 6400190eeb2151d5e1f5614a198f46375c96aba5f11acfeaff13e592fb093653

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