Malicious PDF — malware analysis report

Static analysis result for SHA-256 09cd606422f6ebb7…

MALICIOUS

PDF

41.5 KB Created: 2021-05-15 02:25:14 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: f5b930698c86d758e9eaf39dcbdbfdc6 SHA-1: dcc129df42bbf90e94260fa3bfc9540068aab61b SHA-256: 09cd606422f6ebb7e2faca2225105ea33e5d83bc9424ea101a73de2d690616a9
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links that redirect to malicious infrastructure, specifically promoting game hacks and generators. The heuristic firings confirm these links are associated with malicious redirectors and a lure for game-related exploits. While no scripts were extracted, the embedded URLs and the nature of the lure strongly suggest a phishing or scam attempt designed to lead users to potentially harmful content or further malware downloads.

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/431946152/free-arsenal-hacks-game-hack In PDF document text
    • http://zercalo.org/images/roblox-report-hacker_GM431946152.pdfIn PDF document text
    • http://zercalo.org/images/free-robux-generator-no-human-verification-2021_GM431946152.pdfIn PDF document text
    • http://zercalo.org/images/robux-hack-2021_GM431946152.pdfIn PDF document text
    • http://zercalo.org/images/roblox-free-play-no-download_GM431946152.pdfIn PDF document text
    • http://zercalo.org/images/free-robux-no-verification-2021-android_GM431946152.pdfIn PDF document text
    • http://zercalo.org/images/coin-master-free-coins-and-spins-daily_GM406889139.pdfIn PDF document text
    • http://zercalo.org/images/minecraft-java-server-hosting-free_GM479516143.pdfIn PDF document text
    • http://zercalo.org/images/free-robux-without-human-verification_GM431946152.pdfIn PDF document text
    • http://zercalo.org/images/coin-master-free-spin-and-coin_GM406889139.pdfIn PDF document text
    • http://zercalo.org/images/plug-toolbox-for-minecraft-free-ios_GM479516143.pdfIn PDF document text
    • http://zercalo.org/images/how-to-get-free-spins-on-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://zercalo.org/images/fb-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://zercalo.org/images/get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://zercalo.org/images/if-you-delete-minecraft-can-you-redownload-it-for-free_GM479516143.pdfIn PDF document text
    • http://zercalo.org/images/coin-master-free-spins-hack-link_GM406889139.pdfIn PDF document text
    • http://zercalo.org/images/hack-the-coin-master-game_GM406889139.pdfIn PDF document text
    • http://zercalo.org/images/coin-master-free-gift-cards_GM406889139.pdfIn PDF document text
    • http://zercalo.org/images/coin-master-hack-mod-apk-35-8_GM406889139.pdfIn PDF document text
    • http://zercalo.org/images/free-daily-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://zercalo.org/images/game-give-free-robux_GM431946152.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_off000048cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x48CB 25012 bytes
SHA-256: 813d8007852ab54c7b1d88c02df28364c04556c2348f21964ad46bde023317c2
font_01_sfnt_off0000815c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x815C 17836 bytes
SHA-256: d6079491610f92f53a6d508c31b9bd32bc6214f96ff8d9618faef176008c6c5c

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