Malicious PDF — malware analysis report

Static analysis result for SHA-256 4e99fa9c77a97e6c…

MALICIOUS

PDF

41.9 KB Created: 2021-05-19 14:51:30 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: d6d94bb6e3bf22555aaf05a65cf0c03d SHA-1: a3102c0a53af96070e8fcde7901f4129102ef368 SHA-256: 4e99fa9c77a97e6c0a697e5ff7ea2540bd5e5b8e0f445551840ffebb97ebf2e1
160 Risk Score

Malware Insights

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

The PDF contains multiple links to known malicious redirectors, specifically advertising 'game hacks' and 'free spins' to lure users. The primary malicious URL identified is https://netcdn.xyz/app/406889139/300-daily-free-spins-coin-master-game-hack. The document body and heuristics confirm the intent to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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/406889139/300-daily-free-spins-coin-master-game-hack In PDF document text
    • http://boliviagasenergia.com/images/free-robux-that-actually-works-2021_GM431946152.pdfIn PDF document text
    • http://boliviagasenergia.com/images/best-free-minecraft-hacked-client_GM479516143.pdfIn PDF document text
    • http://boliviagasenergia.com/images/coin-master-daily_GM406889139.pdfIn PDF document text
    • http://boliviagasenergia.com/images/roblox-people-girl_GM431946152.pdfIn PDF document text
    • http://boliviagasenergia.com/images/how-to-become-a-hacker-in-roblox_GM431946152.pdfIn PDF document text
    • http://boliviagasenergia.com/images/coin-master-golden-cards-hack_GM406889139.pdfIn PDF document text
    • http://boliviagasenergia.com/images/download-hacked-games-coin-master_GM406889139.pdfIn PDF document text
    • http://boliviagasenergia.com/images/coin-master-hack-without-human-verification_GM406889139.pdfIn PDF document text
    • http://boliviagasenergia.com/images/wahoo-gaming-co-free-robux_GM431946152.pdfIn PDF document text
    • http://boliviagasenergia.com/images/tiktok-free-no-sign-in_GM835599320.pdfIn PDF document text
    • http://boliviagasenergia.com/images/coin-master-hack-no-download_GM406889139.pdfIn PDF document text
    • http://boliviagasenergia.com/images/www-free-robux-com_GM431946152.pdfIn PDF document text
    • http://boliviagasenergia.com/images/free-roblox-acc_GM431946152.pdfIn PDF document text
    • http://boliviagasenergia.com/images/how-to-get-free-robux-hack_GM431946152.pdfIn PDF document text
    • http://boliviagasenergia.com/images/coin-master-free-stuff-links_GM406889139.pdfIn PDF document text
    • http://boliviagasenergia.com/images/coin-master-hack-game_GM406889139.pdfIn PDF document text
    • http://boliviagasenergia.com/images/how-to-get-free-spins-on-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://boliviagasenergia.com/images/kachifpro_GM406889139.pdfIn PDF document text
    • http://boliviagasenergia.com/images/minecraft-hacks-list_GM479516143.pdfIn PDF document text
    • http://boliviagasenergia.com/images/free-spins-coin-master-no-survey_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
stream_003_off000048f0.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x48F0 24128 bytes
SHA-256: 0650f7c23fe891706415063a45eaca7476e1a5c43871ee088afdbe3e98104343
font_01_sfnt_off00008010.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8010 18656 bytes
SHA-256: 54868513bfe31238ae3395f8478781089c68907253390a8344cb056fc0e1040c

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