Malicious PDF — malware analysis report

Static analysis result for SHA-256 d25ed7db6f6876f9…

MALICIOUS

PDF

41.7 KB Created: 2021-05-16 04:34:44 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 4713c31b8f0e94f71b0cc2d419c551d5 SHA-1: 7aedc398634375c615bb76c84792ac25efdee126 SHA-256: d25ed7db6f6876f9698f33442df081d8f6d89d4f38dee534a22aea3ed2dd6bcf
188 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains a lure for a "free generator / game hack" which is a common social engineering tactic. The document links to malicious redirector infrastructure, specifically https://netcdn.xyz/app/479516143/free-minecraft-server-maker-game-hack, which is likely intended to lead the user to a malicious download or exploit. The presence of malformed stream lengths and ML classifier flagging further support its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

Heuristics 6

  • 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.
  • Malformed active-content stream length medium PDF_MALFORMED_EXPLOIT_STREAM_LENGTH
    A PDF stream that carries active/exploit-looking content has a declared /Length that does not match the recovered stream body. Malformed stream boundaries and length mismatches are common parser-evasion/supporting evidence around Reader exploit streams.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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/free-minecraft-server-maker-game-hack In PDF document text
    • http://learningarabic.co.uk/images/coin-master-game-legitimate-hack-without-signing-up-or-shareing_GM406889139.pdfIn PDF document text
    • http://learningarabic.co.uk/images/how-to-hack-and-get-free-robux_GM431946152.pdfIn PDF document text
    • http://learningarabic.co.uk/images/minecraft-online-free-no-download_GM479516143.pdfIn PDF document text
    • http://learningarabic.co.uk/images/minecraft-ps4-free_GM479516143.pdfIn PDF document text
    • http://learningarabic.co.uk/images/how-to-hack-roblox-passwords_GM431946152.pdfIn PDF document text
    • http://learningarabic.co.uk/images/earn-free-robux-today_GM431946152.pdfIn PDF document text
    • http://learningarabic.co.uk/images/free-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://learningarabic.co.uk/images/free-minecraft-packs_GM479516143.pdfIn PDF document text
    • http://learningarabic.co.uk/images/coin-master-free-spins-daily-link-updated_GM406889139.pdfIn PDF document text
    • http://learningarabic.co.uk/images/roblox-robux-hack_GM431946152.pdfIn PDF document text
    • http://learningarabic.co.uk/images/no-human-verification-hack-for-coin-master_GM406889139.pdfIn PDF document text
    • http://learningarabic.co.uk/images/robux-get-com_GM431946152.pdfIn PDF document text
    • http://learningarabic.co.uk/images/how-to-get-minecraft-for-free-on-tablet_GM479516143.pdfIn PDF document text
    • http://learningarabic.co.uk/images/how-to-get-free-robux-fast_GM431946152.pdfIn PDF document text
    • http://learningarabic.co.uk/images/mobihack-roblox-hack_GM431946152.pdfIn PDF document text
    • http://learningarabic.co.uk/images/coin-master-hack-game-download-ios_GM406889139.pdfIn PDF document text
    • http://learningarabic.co.uk/images/free-coin-master-spins-hack_GM406889139.pdfIn PDF document text
    • http://learningarabic.co.uk/images/coin-master-free-coins-cheat_GM406889139.pdfIn PDF document text
    • http://learningarabic.co.uk/images/free-robux-generator_GM431946152.pdfIn PDF document text
    • http://learningarabic.co.uk/images/coin-master-free-cards_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_off00004a07.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4A07 24580 bytes
SHA-256: e87d07a92a4a5c14ecd9323e98ad184541f7032346e21fd7b27831796fdc3621
font_01_sfnt_off00008213.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8213 17852 bytes
SHA-256: a2113846211f941d41962086a33418b46c13efddcea93467eebdb757cad7d920

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