Malicious PDF — malware analysis report

Static analysis result for SHA-256 4b47e8a6bfd876b3…

MALICIOUS

PDF

35.8 KB Created: 2021-05-21 14:53:36 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 489f95d6144dff422267ea2787eed13b SHA-1: 791a11a100bfd1c50567364b45b6af082ed671e6 SHA-256: 4b47e8a6bfd876b30938e5acc0e1fa322b924c54ba3411107962cfbfd2b14425
122 Risk Score

Malware Insights

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

The PDF document contains a lure for a 'free generator / game hack' and includes a visual call-to-action button. It also contains heuristics indicating a clipboard command lure, suggesting the user might be prompted to execute commands. The primary malicious URL identified is https://netcdn.xyz/app/479516143/minecraft-games-online-free-no-download-game-hack, which is likely used to deliver a secondary payload or redirect to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9492

Heuristics 5

  • 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.
  • Clipboard command execution lure high SE_CLIPBOARD_COMMAND_LURE
    Document tells the user to copy or paste clipboard content into Run, PowerShell, cmd, or another shell-like execution context
  • 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/479516143/minecraft-games-online-free-no-download-game-hack PDF link annotation
    • http://cosmosdawn.net/images/daily-coin-master-free-spin-link_GM406889139.pdfIn PDF document text
    • http://cosmosdawn.net/images/real-robux-generator_GM431946152.pdfIn PDF document text
    • https://www.cosmosdawn.net/images/who-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://cosmosdawn.net/images/minecraft-windows-10-edition-free-download_GM479516143.pdfIn PDF document text
    • http://cosmosdawn.net/images/free-robux-that-actually-works_GM431946152.pdfIn PDF document text
    • https://sigmaclient.info#2In PDF document text
    • https://flux.today#3In 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_off000032b4.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x32B4 24712 bytes
SHA-256: 9b50fde7f37fba6d70253fe274d3c183bc2f0d71acea819ffb79e7663a003b21
font_01_sfnt_off000069e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x69E7 18548 bytes
SHA-256: 5ca17b28647aef81bcc84b8dc260964849d2cd995c521d110ee9368522ce90b7

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