Malicious PDF — malware analysis report

Static analysis result for SHA-256 286730f3befe188c…

MALICIOUS

PDF

34.4 KB Created: 2021-06-19 23:50:58 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 923531537960a11ac88adf2c94cd2f87 SHA-1: e9ceffafeff532cd342e54234e1769c30a733e86 SHA-256: 286730f3befe188c621ba71a313293b2659e32ed98af744a5df87bc1615d0cb4
160 Risk Score

Malware Insights

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

The PDF document contains multiple links to redirectors and purported game hack download pages, indicating a lure for users to download potentially malicious files. The heuristic firings confirm the presence of malicious redirector links and a game hack lure. The document body explicitly mentions "Downloader For Free Robux" and "CLICK HERE TO ACCESS ROBUX GENERATOR", reinforcing the social engineering aspect.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector critical 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. CRITICAL on its own: the /app/<id>/<slug>-game-hack path shape is unambiguous scam infra, and the host rotates so a host-list match can't be relied on.
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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
  • 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 http://netcdn.co/app/431946152/downloader-for-free-robux-game-hack In PDF document text
    • http://hardbit.cn/images/elysian-roblox-free_GM431946152.pdfIn PDF document text
    • http://hardbit.cn/images/hao-hack-roblox_GM431946152.pdfIn PDF document text
    • http://hardbit.cn/images/free-coin-master-gifts_GM406889139.pdfIn PDF document text
    • http://hardbit.cn/images/free-robux-no-verification-needed_GM431946152.pdfIn PDF document text
    • http://hardbit.cn/images/free-tiktok-views-no-verification_GM835599320.pdfIn PDF document text
    • http://hardbit.cn/images/roblox-clone-tycoon-hacks_GM431946152.pdfIn PDF document text
    • http://hardbit.cn/images/roblox-promo-codes-free-robux_GM431946152.pdfIn PDF document text
    • http://hardbit.cn/images/roblox-mobile-hack_GM431946152.pdfIn PDF document text
    • http://hardbit.cn/images/coin-master-gold-cards-hack_GM406889139.pdfIn PDF document text
    • http://hardbit.cn/images/coin-master-hacks-iphone_GM406889139.pdfIn PDF document text
    • http://hardbit.cn/images/coin-master-hack-without-verification_GM406889139.pdfIn PDF document text
    • http://hardbit.cn/images/best-tricks-co-robux_GM431946152.pdfIn PDF document text
    • http://hardbit.cn/images/coin-master-free-spins-link-2021_GM406889139.pdfIn PDF document text
    • http://hardbit.cn/images/get-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://hardbit.cn/images/krnl-roblox_GM431946152.pdfIn PDF document text
    • http://hardbit.cn/images/coin-master-hack-android_GM406889139.pdfIn PDF document text
    • http://hardbit.cn/images/gold-card-coin-master-free_GM406889139.pdfIn PDF document text
    • http://hardbit.cn/images/how-to-get-free-things-on-roblox_GM431946152.pdfIn PDF document text
    • http://hardbit.cn/images/get-me-free-robux_GM431946152.pdfIn PDF document text
    • http://hardbit.cn/images/minecraft-hacks-wurst_GM479516143.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_off000030c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x30C8 21716 bytes
SHA-256: bda430c5878ad84d2341b09bc61658754518eec95e7a9a482f86fedeedb6a390
font_01_sfnt_off000060a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x60A4 19296 bytes
SHA-256: cd17eb8f5a65936e37efc8f72882e24ae2b7e8768110940f9a642ea37bfe748f

Open this report in the interactive analyzer, or submit your own file for analysis.