Malicious PDF — malware analysis report

Static analysis result for SHA-256 c470e8c9c137a984…

MALICIOUS

PDF

39.5 KB Created: 2021-05-10 16:05:17 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 908fdaebc572d4ee3dcbda62cc65726f SHA-1: 84f0ba9cf0570ad4c1a393a28a47779b495ed031 SHA-256: c470e8c9c137a98451373f5783191b73b841c7dcc3c7b39edbe2fd7a3e665b1a
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF document contains multiple embedded URLs that are designed to lure users into clicking on links promising free game currency or hacks. The primary URL, https://netcdn.xyz/app/431946152/free-promo-codes-roblox-game-hack, is flagged as a game hack redirector. The document body, though partially corrupted, also contains references to these lures and additional suspicious URLs. This indicates a phishing or scam attempt to redirect users to potentially malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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-promo-codes-roblox-game-hack PDF link annotation
    • http://schmittmusic.de/images/how-to-get-free-robux-on-pc_GM431946152.pdfIn PDF document text
    • http://schmittmusic.de/images/free-robux-generator-no-human-verification-or-survey-2021_GM431946152.pdfIn PDF document text
    • http://schmittmusic.de/images/2021-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://schmittmusic.de/images/free-robux-games-that-actually-work-2021_GM431946152.pdfIn PDF document text
    • http://schmittmusic.de/images/roblox36com-free-robux_GM431946152.pdfIn PDF document text
    • http://schmittmusic.de/images/www-robux-com_GM431946152.pdfIn PDF document text
    • http://schmittmusic.de/images/rblx-gg-free-robux_GM431946152.pdfIn PDF document text
    • http://schmittmusic.de/images/apps-that-give-you-free-robux_GM431946152.pdfIn PDF document text
    • http://schmittmusic.de/images/free-roblox-accounts-2021-with-robux_GM431946152.pdfIn PDF document text
    • http://schmittmusic.de/images/coin-master-hack-version-ios_GM406889139.pdfIn PDF document text
    • http://schmittmusic.de/images/coin-master-hack-100-working_GM406889139.pdfIn PDF document text
    • http://schmittmusic.de/images/coin-master-hack-iphone_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_003_off00003f4e.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3F4E 24996 bytes
SHA-256: 8ee8109534b53c00458f998468714ed66c422d5fe7785e3603ec0777ca93a6de
font_01_sfnt_off000077ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x77EF 18536 bytes
SHA-256: ef80caca2854abdf9bf8720e52e386ee010a7b90d5614c403206ff018aea8f70

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