Malicious PDF — malware analysis report

Static analysis result for SHA-256 5cd61ef7eab34bfd…

MALICIOUS

PDF

42.4 KB Created: 2021-05-16 21:34:36 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: db5397324a308ddf8a0d2feddac8a049 SHA-1: f83012f637ae87f044ba01169444dec3d725b04e SHA-256: 5cd61ef7eab34bfda18c5c666e96514130e8ea8735939ea658d92211b87493d9
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded links that are identified as malicious redirectors, specifically luring users with 'free generator / game hack' content. The document body, though heavily obfuscated, contains URLs that are consistent with this lure. The primary malicious URL identified is https://netcdn.xyz/app/479516143/simplysarc-game-hack, which is likely used to deliver a secondary payload or redirect to a phishing site.

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/479516143/simplysarc-game-hack In PDF document text
    • https://cogp.greentrade.org.tw/image/data/files/coin-master-hack-apk-33-download_GM406889139.pdfIn PDF document text
    • https://cogp.greentrade.org.tw/image/data/files/free-promo-codes-for-robux_GM431946152.pdfIn PDF document text
    • https://cogp.greentrade.org.tw/image/data/files/coin-master-free-spins-link-download-hack_GM406889139.pdfIn PDF document text
    • https://cogp.greentrade.org.tw/image/data/files/minecraft-mods-download-free_GM479516143.pdfIn PDF document text
    • https://cogp.greentrade.org.tw/image/data/files/hackear-coin-master-sin-verificacion_GM406889139.pdfIn PDF document text
    • https://cogp.greentrade.org.tw/image/data/files/claim-gg-free-robux_GM431946152.pdfIn PDF document text
    • https://cogp.greentrade.org.tw/image/data/files/coin-master-2021-free-spins-link-2021_GM406889139.pdfIn PDF document text
    • https://cogp.greentrade.org.tw/image/data/files/minecraft-education-edition-free-download_GM479516143.pdfIn PDF document text
    • https://cogp.greentrade.org.tw/image/data/files/roblox-images_GM431946152.pdfIn PDF document text
    • https://cogp.greentrade.org.tw/image/data/files/free-robux-clothes_GM431946152.pdfIn PDF document text
    • https://cogp.greentrade.org.tw/image/data/files/can-you-get-minecraft-for-free_GM479516143.pdfIn PDF document text
    • https://cogp.greentrade.org.tw/image/data/files/coin-master-free-spins-link-2021-today_GM406889139.pdfIn PDF document text
    • https://cogp.greentrade.org.tw/image/data/files/free-robux-kid-friendly_GM431946152.pdfIn PDF document text
    • https://cogp.greentrade.org.tw/image/data/files/how-to-hack-roblox-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://cogp.greentrade.org.tw/image/data/files/coin-master-free-spins-today-daily-links_GM406889139.pdfIn PDF document text
    • https://cogp.greentrade.org.tw/image/data/files/coin-master-card-hack-apk_GM406889139.pdfIn PDF document text
    • https://cogp.greentrade.org.tw/image/data/files/how-to-get-free-spins-on-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://cogp.greentrade.org.tw/image/data/files/oprewards-login_GM431946152.pdfIn PDF document text
    • https://cogp.greentrade.org.tw/image/data/files/free-spins-coin-master-hack-2021_GM406889139.pdfIn PDF document text
    • https://cogp.greentrade.org.tw/image/data/files/how-to-get-minecraft-windows-10-for-free-2021_GM479516143.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_off00004b79.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4B79 24596 bytes
SHA-256: 5d09b578ed3cdecc134d5ee06651492b97b5de74094ab7f17630a29ef2cf2112
font_01_sfnt_off00008420.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8420 18156 bytes
SHA-256: d1e3c8cc46daa8b4e8a3620fd036fa3afc0951971ec214e12238e772f71f3550

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