Malicious PDF — malware analysis report

Static analysis result for SHA-256 c7810b97a1d5b0c4…

MALICIOUS

PDF

44.6 KB Created: 2021-06-03 20:13:32 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 27076efe826215227ed826e49473250b SHA-1: beccee4e4f94812bfdff3e40e80308985ae6ec88 SHA-256: c7810b97a1d5b0c46e3e9ffcfa2e06f80689608c2f5869b21451fd727b7cc083
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains heuristics indicating it's a lure for game hacks, specifically mentioning 'free robux'. It embeds multiple URLs, with the primary one being 'https://netcdn.online/app/431946152/www-free-robux-game-hack'. While no scripts were explicitly extracted, the PDF structure and embedded links suggest a phishing or redirection attempt to a site offering illegitimate game advantages, which is a common social engineering tactic.

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.online/app/431946152/www-free-robux-game-hack PDF link annotation
    • http://www.rewaqousha.net/userfiles/files/how-to-get-real-robux_GM431946152.pdfIn PDF document text
    • http://www.rewaqousha.net/userfiles/files/is-minecraft-bedrock-free_GM479516143.pdfIn PDF document text
    • http://www.rewaqousha.net/userfiles/files/com-roblox_GM431946152.pdfIn PDF document text
    • http://www.rewaqousha.net/userfiles/files/coin-master-codes_GM406889139.pdfIn PDF document text
    • http://www.rewaqousha.net/userfiles/files/spin-coin-master-free_GM406889139.pdfIn PDF document text
    • http://www.rewaqousha.net/userfiles/files/free-spin-coin-master-hack-2021_GM406889139.pdfIn PDF document text
    • http://www.rewaqousha.net/userfiles/files/free-minecraft-windows-10-with-java_GM479516143.pdfIn PDF document text
    • http://www.rewaqousha.net/userfiles/files/what-tiktok-free-movies_GM835599320.pdfIn PDF document text
    • http://www.rewaqousha.net/userfiles/files/wahoogaming-co-free-robux_GM431946152.pdfIn PDF document text
    • http://www.rewaqousha.net/userfiles/files/rbxoffer-com-free-robux_GM431946152.pdfIn PDF document text
    • http://www.rewaqousha.net/userfiles/files/http-bit-ly-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://www.rewaqousha.net/userfiles/files/free-minecraft-client_GM479516143.pdfIn PDF document text
    • http://www.rewaqousha.net/userfiles/files/coin-master-app_GM406889139.pdfIn PDF document text
    • http://www.rewaqousha.net/userfiles/files/coin-master-daily-free-spins-and-coins-2021_GM406889139.pdfIn PDF document text
    • http://www.rewaqousha.net/userfiles/files/coin-master-hack-using-lucky-patcher_GM406889139.pdfIn PDF document text
    • http://www.rewaqousha.net/userfiles/files/how-to-hack-and-get-free-robux_GM431946152.pdfIn PDF document text
    • http://www.rewaqousha.net/userfiles/files/coin-master-hack-online-cheat_GM406889139.pdfIn PDF document text
    • http://www.rewaqousha.net/userfiles/files/how-to-earn-robux_GM431946152.pdfIn PDF document text
    • http://www.rewaqousha.net/userfiles/files/coin-master-online-hack-2021_GM406889139.pdfIn PDF document text
    • http://www.rewaqousha.net/userfiles/files/coin-master-free-stuff-links_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_004_off00005012.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5012 26120 bytes
SHA-256: 840fd9ca10677dc13ab00b24c85f44d7e76178a64010f170f76d25aaa21fb282
font_01_sfnt_off00008b48.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8B48 18376 bytes
SHA-256: 3afa3067d1f3c9d8d4e5028784d7d2a7352a3b977a914758f486701e4d265e0a

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