Malicious PDF — malware analysis report

Static analysis result for SHA-256 aed434c924f8ab5e…

MALICIOUS

PDF

44.9 KB Created: 2021-06-11 04:08:02 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 15375d02aac75eb624da51e1601f7683 SHA-1: abecda0fc94dae01c49d654f776b5a79655c2c4b SHA-256: aed434c924f8ab5eb751bef39a00d14567713efb7eda39c71694d6afbb4899d8
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains lures related to game hacking and free generators, directing users to malicious URLs. The ML classifier strongly indicates maliciousness, and the presence of embedded URLs suggests an attempt to redirect users to potentially harmful content or download further payloads. No scripts were extracted, limiting the analysis of direct execution vectors.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

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 https://netcdn.tw/app/431946152/would-you-get-banned-from-roblox-if-you-hacked-game-hack PDF link annotation
    • http://library.gkigadingserpong.org/repository/nopde-engine-lua-script-hack-roblox_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/how-to-hack-and-get-free-robux_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/free-spins-coin-master-app_GM406889139.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/get-free-robux-gg_GM431946152.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/how-to-get-free-robux-by-playing-roblox_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/free-coin-and-spin-for-coin-master_GM406889139.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/coin-master-free-spins-link-today-haktuts_GM406889139.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/robux-generator-no-survey_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/coin-master-hack-without-verification-code_GM406889139.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/coin-master-daily-free-spins-and-coins_GM406889139.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/earn-robux-today_GM431946152.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/coin-master-hack-no-survey-or-verification_GM406889139.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/free-robux-place_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/swordpack-in-roblox-free_GM431946152.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/minecraft-creative-mode-free_GM479516143.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/free-roblox-clothes-pastebin_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/how-to-get-free-followers-on-roblox_GM431946152.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/free-roblox-accounts-with-robux_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/free-100-robux_GM431946152.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/best-minecraft-hacked-client-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
stream_004_off00005149.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5149 24704 bytes
SHA-256: d5b5c91af28a06d2f9b791681aa2ec469da79503c085c92ca5e2011fdf3222ec
font_01_sfnt_off000089c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x89C8 19384 bytes
SHA-256: 28031b058a1ff35452aec837ea79a029a7dc9035dc8c116ed3d9f6bb8a88136f

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