Malicious PDF — malware analysis report

Static analysis result for SHA-256 c55d95c9e0192bc9…

MALICIOUS

PDF

34.6 KB Created: 2021-07-03 16:50:30 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 0f52a65cb8a73271d84188bcc9792ca4 SHA-1: ce74b99208ff9c349eb475d2dfca7a29bba05268 SHA-256: c55d95c9e0192bc9a16b0585a4d00bd006345e155216c4c622659e6d0a813918
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains embedded links that lead to a known malicious redirector, likely intended to deliver a second-stage payload. The document body and extracted URLs explicitly mention free Robux and game hacks, indicating a lure for users interested in such topics. The ML classifier also strongly flagged this PDF as malicious.

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.tw/app/431946152/how-to-give-robux-on-mobile-game-hack In PDF document text
    • https://eagleeyebooks.com/ckfinder/userfiles/files/free-roblox-accounts-with-robux-that-work-2021_GM431946152.pdfIn PDF document text
    • https://eagleeyebooks.com/ckfinder/userfiles/files/how-to-o-get-free-coin-master-spins_GM406889139.pdfIn PDF document text
    • https://eagleeyebooks.com/ckfinder/userfiles/files/roblox-promo-codes-free-robux_GM431946152.pdfIn PDF document text
    • https://eagleeyebooks.com/ckfinder/userfiles/files/coin-master-online_GM406889139.pdfIn PDF document text
    • https://eagleeyebooks.com/ckfinder/userfiles/files/get-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://eagleeyebooks.com/ckfinder/userfiles/files/how-to-get-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • https://eagleeyebooks.com/ckfinder/userfiles/files/free-roblox-birthday-card_GM431946152.pdfIn PDF document text
    • https://eagleeyebooks.com/ckfinder/userfiles/files/free-robux-and-builders-club-no-human-verification_GM431946152.pdfIn PDF document text
    • https://eagleeyebooks.com/ckfinder/userfiles/files/how-to-get-free-coins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://eagleeyebooks.com/ckfinder/userfiles/files/free-minecraft-skin-packs_GM479516143.pdfIn PDF document text
    • https://eagleeyebooks.com/ckfinder/userfiles/files/how-to-get-free-clothes-on-roblox-iphone_GM431946152.pdfIn PDF document text
    • https://eagleeyebooks.com/ckfinder/userfiles/files/roblox-free-skin_GM431946152.pdfIn PDF document text
    • https://eagleeyebooks.com/ckfinder/userfiles/files/free-spins-coin-master-2021-no-verification_GM406889139.pdfIn PDF document text
    • https://eagleeyebooks.com/ckfinder/userfiles/files/uirbx-club-hack-free-robux_GM431946152.pdfIn PDF document text
    • https://eagleeyebooks.com/ckfinder/userfiles/files/how-to-get-minecraft-for-free-on-your-phone_GM479516143.pdfIn PDF document text
    • https://eagleeyebooks.com/ckfinder/userfiles/files/free-views-on-tiktok_GM835599320.pdfIn PDF document text
    • https://eagleeyebooks.com/ckfinder/userfiles/files/best-free-roblox-outfits_GM431946152.pdfIn PDF document text
    • https://eagleeyebooks.com/ckfinder/userfiles/files/free-roblox-svg_GM431946152.pdfIn PDF document text
    • https://eagleeyebooks.com/ckfinder/userfiles/files/free-coin-master-spins_GM406889139.pdfIn PDF document text
    • https://eagleeyebooks.com/ckfinder/userfiles/files/roblox-console-hack-2021_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 4

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_off00002eef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2EEF 22716 bytes
SHA-256: b9cdce4f5339f79c6c1a7068d0d7de04e7d427f7c3f45e305903860d8d7e3004
font_01_sfnt_off00006188.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6188 19220 bytes
SHA-256: 424900dac97a3687442371db0e2676db335f1cd3f9ee3aa89b35753401a72ca9

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