Malicious PDF — malware analysis report

Static analysis result for SHA-256 bb9b3b8cc33931f7…

MALICIOUS

PDF

36.8 KB Created: 2021-05-24 06:08:48 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: e0069d8c3c55fa0a69cd87638f47cfb3 SHA-1: 019116dbaccc5ccc100cf386adf092a586f4b15f SHA-256: bb9b3b8cc33931f7b9cecd668d11014c78440a83b60156c542e27c507d51d063
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document uses a "Free Robux Quiz" lure and a prominent "CLICK HERE TO ACCESS ROBLOX GENERATOR" button to trick users into clicking a malicious URL. The embedded URL, https://netcdn.xyz/app/431946152/free-robux-quiz-game-hack, is flagged as a high-risk redirector, suggesting it leads to a scam or malware. No scripts were extracted, but the PDF structure and embedded links strongly indicate a phishing or social engineering attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9447

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-quiz-game-hack PDF link annotation
    • https://www.ausecus.com/images/free-games-like-roblox_GM431946152.pdfIn PDF document text
    • https://www.ausecus.com/images/minecraft-account-hacked_GM479516143.pdfIn PDF document text
    • https://www.ausecus.com/images/how-to-get-free-spins-on-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://www.ausecus.com/images/free-roblox-clothes-for-your-avatar_GM431946152.pdfIn PDF document text
    • https://www.ausecus.com/images/coin-master-daily-spin-free_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_002_off0000344a.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x344A 25408 bytes
SHA-256: e248c7b1d65a8bc448381aefb48a87167118808642f0b1f14edcf1d38fc0edc2
font_01_sfnt_off00006e11.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6E11 18376 bytes
SHA-256: b52519a3f27e6183245bec6d77d3cda93d913202ea7147b0d6d9048d316cd5fc

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