Malicious PDF — malware analysis report

Static analysis result for SHA-256 a6679388b14517a9…

MALICIOUS

PDF

34.9 KB Created: 2021-06-27 22:58:11 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 20192c5af42fdbaf637c352a012bc8e8 SHA-1: 9750e56499421cb5de4d7584142e8bcdabf3b4a8 SHA-256: a6679388b14517a9f80e54daa2cbba3d6538d4d5800770c668b67e564f848f04
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a prominent link to 'free-robux-openrewards-game-hack' which is flagged as a malicious redirector. The document body and heuristics indicate a lure for game-related cheats or currency, aiming to redirect users to potentially harmful sites. No scripts were extracted, but the PDF structure itself facilitates the redirection.

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/free-robux-openrewards-game-hack In PDF document text
    • http://library.acehresearch.org/repository/20-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://library.acehresearch.org/repository/what-is-a-robux_GM431946152.pdfIn PDF document text
    • http://library.acehresearch.org/repository/coin-master-hack-2021_GM406889139.pdfIn PDF document text
    • http://library.acehresearch.org/repository/free-roblox-accounts-with-robux-that-work-2021_GM431946152.pdfIn PDF document text
    • http://library.acehresearch.org/repository/roblox-free-pants_GM431946152.pdfIn PDF document text
    • http://library.acehresearch.org/repository/daily-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://library.acehresearch.org/repository/if-i-uninstall-minecraft-can-i-reinstall-it-for-free_GM479516143.pdfIn PDF document text
    • http://library.acehresearch.org/repository/free-muscle-t-shirt-roblox_GM431946152.pdfIn PDF document text
    • http://library.acehresearch.org/repository/how-to-get-free-robux-my-money-safe-s_GM431946152.pdfIn PDF document text
    • http://library.acehresearch.org/repository/free-coins-coin-master-haktuts_GM406889139.pdfIn PDF document text
    • http://library.acehresearch.org/repository/roblox-mm2-hack-script_GM431946152.pdfIn PDF document text
    • http://library.acehresearch.org/repository/coin-master-apk-mod-hack-download_GM406889139.pdfIn PDF document text
    • http://library.acehresearch.org/repository/free-coins-2021-coin-master-link_GM406889139.pdfIn PDF document text
    • http://library.acehresearch.org/repository/free-money-links-coin-master_GM406889139.pdfIn PDF document text
    • http://library.acehresearch.org/repository/games-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://library.acehresearch.org/repository/blogspot-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://library.acehresearch.org/repository/ingame-free-rubux-cheat-roblox_GM431946152.pdfIn PDF document text
    • http://library.acehresearch.org/repository/free-coin-master-hacks_GM406889139.pdfIn PDF document text
    • http://library.acehresearch.org/repository/roblox-treasure-hunt-simulator-coin-hack_GM431946152.pdfIn PDF document text
    • http://library.acehresearch.org/repository/minecraft-online-free-no-download_GM479516143.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

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_off0000307a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x307A 22432 bytes
SHA-256: 607b33dabec1af0fc02c3ff4b2890cb84c7549279386bdbba3054b65c47e4eb9
font_01_sfnt_off00006289.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6289 19228 bytes
SHA-256: 99c45667ab21ba030c8afa18a37387ce2a1b40b79678de0312b6e2d94ea99ef8

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