Malicious PDF — malware analysis report

Static analysis result for SHA-256 a9c1ff9d50b20eff…

MALICIOUS

PDF

48.5 KB Created: 2021-05-12 11:44:10 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 2a848f5d9f88457fe6d3d3509bd88cb8 SHA-1: 8d423d4feb3e3258783b7989732194fba19ab23f SHA-256: a9c1ff9d50b20eff91b55af43296960fa8a0dc79c3e049b4145263fd0f3fe298
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains lures for "free Robux" and "game hacks", directing users to malicious URLs such as https://netcdn.xyz/app/431946152/free-robux-generator-2021-no-human-verification-or-survey-game-hack. While no scripts were explicitly extracted, the presence of embedded URLs and the "game hack" lure strongly suggest an attempt to redirect users to potentially malicious sites for further exploitation or credential harvesting. The ML classifier also flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9013

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.xyz/app/431946152/free-robux-generator-2021-no-human-verification-or-survey-game-hack PDF link annotation
    • http://lib.baruna-husada.ac.id//repository/mcmaster-club-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://lib.baruna-husada.ac.id/repository/grab-points-login_GM431946152.pdfIn PDF document text
    • http://lib.baruna-husada.ac.id//repository/today-free-spin-link-for-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.baruna-husada.ac.id//repository/how-to-get-free-gold-cards-on-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.baruna-husada.ac.id/repository/minecraft-hacked-client-download_GM479516143.pdfIn PDF document text
    • http://lib.baruna-husada.ac.id/repository/robux-match_GM431946152.pdfIn PDF document text
    • http://lib.baruna-husada.ac.id/repository/202100-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.baruna-husada.ac.id/repository/free-robux-2021_GM431946152.pdfIn PDF document text
    • http://lib.baruna-husada.ac.id/repository/minecraft_GM479516143.pdfIn PDF document text
    • http://lib.baruna-husada.ac.id//repository/is-minecraft-free-on-xbox_GM479516143.pdfIn PDF document text
    • http://lib.baruna-husada.ac.id//repository/coin-master-hack-2021_GM406889139.pdfIn PDF document text
    • http://lib.baruna-husada.ac.id//repository/claim-roblox_GM431946152.pdfIn PDF document text
    • http://lib.baruna-husada.ac.id//repository/coin-master-70-spin-link-today_GM406889139.pdfIn PDF document text
    • http://lib.baruna-husada.ac.id//repository/free-roblox-accounts-with-robux-that-work-2021_GM431946152.pdfIn PDF document text
    • http://lib.baruna-husada.ac.id/repository/free-minecraft-codes-2021_GM479516143.pdfIn PDF document text
    • http://lib.baruna-husada.ac.id//repository/free-robux-no-verification-2021-android_GM431946152.pdfIn PDF document text
    • http://lib.baruna-husada.ac.id//repository/roblox-heroes-online_GM431946152.pdfIn PDF document text
    • http://lib.baruna-husada.ac.id/repository/coin-master-hack-spin-generator-tool_GM406889139.pdfIn PDF document text
    • http://lib.baruna-husada.ac.id/repository/robux-hack-tools_GM431946152.pdfIn PDF document text
    • http://lib.baruna-husada.ac.id//repository/coin-master-hack-apk-with-fb-login-2021_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004bb7.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4BB7 28128 bytes
SHA-256: c995125b4a0951b38a2cfa336dc3e182a1af8f4bf29eaa48449f204d05c1d657
font_01_sfnt_off00008ab6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8AB6 5596 bytes
SHA-256: 9a13c2580265a78e8a7257496a31ee0055738af7e20a5661c2902efe4bf05ce5
font_02_sfnt_off0000975d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x975D 19556 bytes
SHA-256: 76adbda1d3e57e3064df3e292cf485a94c26c1a96e5d3a4e3c484cd1a4e129d0

Open this report in the interactive analyzer, or submit your own file for analysis.