Malicious PDF — malware analysis report

Static analysis result for SHA-256 c9a379e398178bfa…

MALICIOUS

PDF

34.4 KB Created: 2021-06-20 18:29:15 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: f98fe00e6b2beee54737b6eba899a52f SHA-1: 4e57ace8cae274fbe43127ca3b61bc175151de2e SHA-256: c9a379e398178bfa5a3ddad200a4697fcc054994659162eb6ed2faf1497f7cb4
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document employs a common lure of free in-game currency to trick users into clicking malicious links. The primary link directs to a known malicious redirector infrastructure, which likely serves as a gateway to further malicious content or phishing pages. The presence of multiple similar URLs suggests a campaign focused on exploiting interest in popular games.

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-and-tix-app-game-hack In PDF document text
    • http://www.fluidtech.hu/images/bloxawards-com-earn-free-robux_GM431946152.pdfIn PDF document text
    • http://www.fluidtech.hu/images/www-bandicam-com-free-robux_GM431946152.pdfIn PDF document text
    • http://www.fluidtech.hu/images/coin-master-free-spins-link-may-2021_GM406889139.pdfIn PDF document text
    • http://www.fluidtech.hu/images/coin-master-daily-free-spins-link-today-2021-free_GM406889139.pdfIn PDF document text
    • http://www.fluidtech.hu/images/is-roblox-100-cheat-ingine-patched_GM431946152.pdfIn PDF document text
    • http://www.fluidtech.hu/images/free-robux-link_GM431946152.pdfIn PDF document text
    • http://www.fluidtech.hu/images/roblox-inappropriate_GM431946152.pdfIn PDF document text
    • http://www.fluidtech.hu/images/coin-master-hack-trick-2021_GM406889139.pdfIn PDF document text
    • http://www.fluidtech.hu/images/free-robux-only-username-no-human-verification_GM431946152.pdfIn PDF document text
    • http://www.fluidtech.hu/images/minecraft-reach-hack_GM479516143.pdfIn PDF document text
    • http://www.fluidtech.hu/images/free-robux-no-downloads-no-surveys_GM431946152.pdfIn PDF document text
    • http://www.fluidtech.hu/images/free-redeem-cards-for-roblox_GM431946152.pdfIn PDF document text
    • http://www.fluidtech.hu/images/roblox-hack-downland_GM431946152.pdfIn PDF document text
    • http://www.fluidtech.hu/images/coin-master-pc-hack-tool_GM406889139.pdfIn PDF document text
    • http://www.fluidtech.hu/images/free-roblox-website_GM431946152.pdfIn PDF document text
    • http://www.fluidtech.hu/images/free-roblox-toys_GM431946152.pdfIn PDF document text
    • http://www.fluidtech.hu/images/how-do-you-hack-roblox_GM431946152.pdfIn PDF document text
    • http://www.fluidtech.hu/images/minecraft-free_GM479516143.pdfIn PDF document text
    • http://www.fluidtech.hu/images/wurst_GM479516143.pdfIn PDF document text
    • http://www.fluidtech.hu/images/coin-master-hacks-xyz_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
font_00_sfnt_off00002ef3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2EF3 22540 bytes
SHA-256: 93908c4f3f2fa24ae76bb3bc56f97a1786ea96205e164e6e1eb3869d1d1a7b31
font_01_sfnt_off00006127.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6127 19184 bytes
SHA-256: 0cee05372360e192f423b97cd375a76317d239508ec0850f82e0b847092e7d76

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