Malicious PDF — malware analysis report

Static analysis result for SHA-256 5517d27f9cf8940f…

MALICIOUS

PDF

45.9 KB Created: 2021-05-18 03:01:04 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 52d62cfb8e938a4e4eb1405e468f28ae SHA-1: d31d45cd853075802571688b0bce816af74da3ff SHA-256: 5517d27f9cf8940f3498ee37a2a5f3782d16e35e854fac7e690ab408df77f61e
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple links designed to lure users into clicking on what appears to be a 'free generator' or 'game hack'. The primary link, https://netcdn.xyz/app/406889139/coin-master-daily-free-spin-app-game-hack, is flagged as a malicious redirector. The document body and embedded URLs suggest a social engineering tactic to drive traffic to potentially malicious websites, likely for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9432

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 https://netcdn.xyz/app/406889139/coin-master-daily-free-spin-app-game-hack In PDF document text
    • http://sports-service.com/images/free-daily-spins-and-coins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://sports-service.com/images/coin-master-hack-co_GM406889139.pdfIn PDF document text
    • http://sports-service.com/images/robux-hack-2021_GM431946152.pdfIn PDF document text
    • http://sports-service.com/images/how-to-get-free-roblox_GM431946152.pdfIn PDF document text
    • http://sports-service.com/images/free-robux-no-human-verification-or-survey-2021_GM431946152.pdfIn PDF document text
    • http://sports-service.com/images/how-to-change-your-name-in-roblox-for-free_GM431946152.pdfIn PDF document text
    • http://sports-service.com/images/get-free-spins-coin-master-link_GM406889139.pdfIn PDF document text
    • http://sports-service.com/images/www-roblox-com-robux-free_GM431946152.pdfIn PDF document text
    • http://sports-service.com/images/real-free-robux-generator_GM431946152.pdfIn PDF document text
    • http://sports-service.com/images/free-roblox-followers-generator_GM431946152.pdfIn PDF document text
    • http://sports-service.com/images/roblox-com-free-robux_GM431946152.pdfIn PDF document text
    • http://sports-service.com/images/coin-master-free-items_GM406889139.pdfIn PDF document text
    • http://sports-service.com/images/coin-master-free-coin-hack_GM406889139.pdfIn PDF document text
    • http://sports-service.com/images/flame-gg-free-robux_GM431946152.pdfIn PDF document text
    • http://sports-service.com/images/link-for-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://sports-service.com/images/coin-master-free-link-app_GM406889139.pdfIn PDF document text
    • http://sports-service.com/images/roblox-redeem-card-codes-free_GM431946152.pdfIn PDF document text
    • http://sports-service.com/images/coin-master-hacks-android_GM406889139.pdfIn PDF document text
    • http://sports-service.com/images/coin-master-hack-no-verify_GM406889139.pdfIn PDF document text
    • http://sports-service.com/images/coin-master-daily-bonus_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004b91.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4B91 26040 bytes
SHA-256: 69e6a31757cac575e2059b11a46d6426a817f70f5c6f8f37c1e8f640250f4f62
font_01_sfnt_off00008727.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8727 2840 bytes
SHA-256: 3fb127b764b9d10f5525bc4de5ec8316de704409ccb0cf21cff3ad8a30d11676
font_02_sfnt_off000090d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x90D9 18308 bytes
SHA-256: f9a3a46f76b0cae8a4d9bd0baf07f2a5aefd3f4554b846be65e0119e8f17791d

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