Malicious PDF — malware analysis report

Static analysis result for SHA-256 f92014a9b23b14e9…

MALICIOUS

PDF

44.2 KB Created: 2021-05-19 11:39:36 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: bc576fe3a7ca63ee21f2f6d433a46a07 SHA-1: 3c0d68b5e2eb7eb9e937670adf2ae79c586875cd SHA-256: f92014a9b23b14e9852b74ed78f466420c80e6e8fdea39416dbba693f845bb7c
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to known malicious redirectors, specifically promoting 'game hacks' and 'free generators' for popular games. The embedded URLs, such as https://netcdn.xyz/app/406889139/spins-coin-master-game-hack, are designed to lure users into clicking, likely leading to further malicious content or downloads. The ML classifier also strongly indicated maliciousness, supporting the observed redirection behavior.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9648

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/spins-coin-master-game-hack In PDF document text
    • http://fccsms.com/images/free-spins-on-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://fccsms.com/images/free-robux-mobile_GM431946152.pdfIn PDF document text
    • http://fccsms.com/images/robux-generator-no-verification-2021_GM431946152.pdfIn PDF document text
    • http://fccsms.com/images/get-free-spins-on-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://fccsms.com/images/safe-hack-for-coin-master-android_GM406889139.pdfIn PDF document text
    • http://fccsms.com/images/roblox36com-free-robux_GM431946152.pdfIn PDF document text
    • http://fccsms.com/images/coin-master-400-spin-link_GM406889139.pdfIn PDF document text
    • http://fccsms.com/images/info-roblox-com-robux_GM431946152.pdfIn PDF document text
    • http://fccsms.com/images/free-minecraft-generator_GM479516143.pdfIn PDF document text
    • http://fccsms.com/images/coin-master-free-shield-link_GM406889139.pdfIn PDF document text
    • http://fccsms.com/images/coin-master-free-cards-link_GM406889139.pdfIn PDF document text
    • http://fccsms.com/images/how-to-get-free-robux-without-downloading-apps-2021_GM431946152.pdfIn PDF document text
    • http://fccsms.com/images/coin-master-mod-apk-free-download-for-android_GM406889139.pdfIn PDF document text
    • http://fccsms.com/images/coin-master-hoe-to-get-extra-free-spins_GM406889139.pdfIn PDF document text
    • http://fccsms.com/images/legit-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://fccsms.com/images/roblox-free-clothes-hack_GM431946152.pdfIn PDF document text
    • http://fccsms.com/images/how-to-get-free-spins-on-coin-master-without-waiting_GM406889139.pdfIn PDF document text
    • http://fccsms.com/images/free-robux-com-2021_GM431946152.pdfIn PDF document text
    • http://fccsms.com/images/coin-master-free-coins-link-march-2021_GM406889139.pdfIn PDF document text
    • http://fccsms.com/images/coin-master-free-spins-link-2021-april_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_off000046bb.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x46BB 25944 bytes
SHA-256: 593a014799fb94d1a766172bc33cb56b1a702a7b5f9457b033886be481fab14a
font_01_sfnt_off00008186.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8186 2944 bytes
SHA-256: fcfcd28869b8d6c7503d63ed8d48371ec5b580fea2733193e2acbb82b3d30a76
font_02_sfnt_off00008bb0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8BB0 17724 bytes
SHA-256: 0257a4de90566e409ba2bfa7d0f71a7654d133b6165eb0f1f4c82d1b29535a15

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