Malicious PDF — malware analysis report

Static analysis result for SHA-256 874581538134526b…

MALICIOUS

PDF

40.8 KB Created: 2021-04-30 05:36:10 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-05
MD5: b5328e09158308543e0f85cf2b420076 SHA-1: 110e6835e45bf49cf628eef771140d43650d7714 SHA-256: 874581538134526ba4e4aaa82173d846036399758f69bef25686fb17042a3922
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a lure related to 'free generators' and 'game hacks' for Roblox, directing users to a suspicious URL. The ML classifier strongly flagged this PDF as malicious, and multiple heuristics indicate a redirection to potentially harmful content. No scripts were extracted, but the embedded links suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9941

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/hack-para-conseguir-dientes-gratis-en-sharkbite-roblox-game-hack PDF link annotation
    • http://gc-sistemas.com.ar/images/roblox-bloxburg-free-gamepass.pdfIn PDF document text
    • http://gc-sistemas.com.ar/images/free-nfl-skin-in-roblox.pdfIn PDF document text
    • http://gc-sistemas.com.ar/images/como-tener-robux-infinitos-sin-hacks.pdfIn PDF document text
    • http://gc-sistemas.com.ar/images/roblox-hack-program-download.pdfIn PDF document text
    • http://gc-sistemas.com.ar/images/roblox-free-robux-hack-no-human-verification.pdfIn PDF document text
    • http://gc-sistemas.com.ar/images/free-roblox-cards-not-used.pdfIn PDF document text
    • http://gc-sistemas.com.ar/images/how-to-hack-someones-account-in-roblox.pdfIn PDF document text
    • http://gc-sistemas.com.ar/images/how-to-be-spongebob-in-roblox-for-free.pdfIn PDF document text
    • http://gc-sistemas.com.ar/images/app-hacked-roblox.pdfIn PDF document text
    • http://gc-sistemas.com.ar/images/roblox-adopt-me-cheats-2021.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 1

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004219.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4219 25328 bytes
SHA-256: 68ad32211dc379e11df4234b31303261977f0d43caa2ad9bddf37ca1b720692c
font_01_sfnt_off00007ab9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7AB9 19320 bytes
SHA-256: 9858c16f8ea9a0bc8d356b30b8fe354b00f11472695649c8f4c4a211d9d5fd66

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