Malicious PDF — malware analysis report

Static analysis result for SHA-256 813a0ea112f6986a…

MALICIOUS

PDF

43.7 KB Created: 2021-05-12 15:01:36 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 94ac39ed571f1aca657d67610bf83d77 SHA-1: e44f71c22b5a15a2d39845450e9f8a5836a854fd SHA-256: 813a0ea112f6986a7fa94118ae9fdaef9b8f8e7b7fb4c177fef1ff6e130cc90f
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a high-severity heuristic firing for a 'GAME_HACK_REDIRECT_LURE', indicating it links to a scam. The embedded URL `https://netcdn.xyz/app/431946152/info-roblox-com-robux-game-hack` and numerous other URLs hosted on `damvallei.be` reinforce this lure. The document body, though heavily obfuscated, contains references to Roblox and game hacks, aligning with the lure. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9969

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/info-roblox-com-robux-game-hack PDF link annotation
    • http://damvallei.be/images/how-to-hack-someones-roblox-account-2021_GM431946152.pdfIn PDF document text
    • http://damvallei.be/images/free-robux-no-human-verification_GM431946152.pdfIn PDF document text
    • http://damvallei.be/images/how-to-get-free-robux-website_GM431946152.pdfIn PDF document text
    • http://damvallei.be/images/minecraft-clipart-free_GM479516143.pdfIn PDF document text
    • http://damvallei.be/images/free-robux-hack-us_GM431946152.pdfIn PDF document text
    • http://damvallei.be/images/free-robux-clothes_GM431946152.pdfIn PDF document text
    • http://damvallei.be/images/www-free-robux_GM431946152.pdfIn PDF document text
    • http://damvallei.be/images/game-give-free-robux_GM431946152.pdfIn PDF document text
    • http://damvallei.be/images/free-robux-websites-2021_GM431946152.pdfIn PDF document text
    • http://damvallei.be/images/roblox-money-hack_GM431946152.pdfIn PDF document text
    • http://damvallei.be/images/minecraft-windows-10-free-code_GM479516143.pdfIn PDF document text
    • http://damvallei.be/images/coin-master-free-chest-link_GM406889139.pdfIn PDF document text
    • http://damvallei.be/images/coinmasterhack-club_GM406889139.pdfIn PDF document text
    • http://damvallei.be/images/coin-master-el-tiger-card-free_GM406889139.pdfIn PDF document text
    • http://damvallei.be/images/coin-master-hack-2021-ios_GM406889139.pdfIn PDF document text
    • http://damvallei.be/images/how-to-hack-and-get-free-robux_GM431946152.pdfIn PDF document text
    • http://damvallei.be/images/coin-master-free-coin-and-spin-app_GM406889139.pdfIn PDF document text
    • http://damvallei.be/images/free-robux-2021-no-verification_GM431946152.pdfIn PDF document text
    • http://damvallei.be/images/roblox-hack-com_GM431946152.pdfIn PDF document text
    • http://damvallei.be/images/free-appsfor-coin-master-daily-rewards_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
font_00_sfnt_off00004a38.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4A38 28676 bytes
SHA-256: 06b7e30e184a69a936051811aac4380df3a420207e049e132e46ca4fcd799f91
font_01_sfnt_off000088ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x88EF 18184 bytes
SHA-256: 2666f19638e8a85676fd26a40fcd2c9ad598b57ed36ce75be6242751bafc6488

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