Malicious PDF — malware analysis report

Static analysis result for SHA-256 0964b750cd9d4e23…

MALICIOUS

PDF

34.9 KB Created: 2021-07-08 06:45:35 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 2af6defc7b1b3be613a3a84c00cfd89e SHA-1: c8a60a0fc4c701da0e85e7349d82759e447cdbf2 SHA-256: 0964b750cd9d4e23fc6708aa444724a053285a96337c0b8db281cdde79fdf7fe
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF document contains multiple links to known malicious redirectors, specifically advertising 'free generators' and 'game hacks' for popular games like Roblox. The primary lure URL is http://netcdn.tw/app/431946152/how-to-get-free-robux-without-verification-game-hack, which is designed to trick users into clicking through to potentially malicious sites. While no scripts were explicitly extracted, the PDF structure and embedded URLs strongly suggest an attempt to exploit user interest in free in-game items to deliver a secondary payload or lead to phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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 http://netcdn.tw/app/431946152/how-to-get-free-robux-without-verification-game-hack In PDF document text
    • https://zd407.com/ocean_shop1/admin/upload/files/free-robux-2021_GM431946152.pdfIn PDF document text
    • https://zd407.com/ocean_shop1/admin/upload/files/mobihack-net-roblox-hack_GM431946152.pdfIn PDF document text
    • https://zd407.com/ocean_shop1/admin/upload/files/get-free-robux_GM431946152.pdfIn PDF document text
    • https://zd407.com/ocean_shop1/admin/upload/files/free-admin-roblox-script_GM431946152.pdfIn PDF document text
    • https://zd407.com/ocean_shop1/admin/upload/files/pokemon-go-free-raid-pass_GM1094591345.pdfIn PDF document text
    • https://zd407.com/ocean_shop1/admin/upload/files/free-coins-and-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • https://zd407.com/ocean_shop1/admin/upload/files/80-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://zd407.com/ocean_shop1/admin/upload/files/coin-master-free-coins-and-spins-link_GM406889139.pdfIn PDF document text
    • https://zd407.com/ocean_shop1/admin/upload/files/robux-hack-no-verification-humaine_GM431946152.pdfIn PDF document text
    • https://zd407.com/ocean_shop1/admin/upload/files/free-spins-for-coin-master-without-human-verification_GM406889139.pdfIn PDF document text
    • https://zd407.com/ocean_shop1/admin/upload/files/how-to-get-more-robux_GM431946152.pdfIn PDF document text
    • https://zd407.com/ocean_shop1/admin/upload/files/pills-roblox-hack_GM431946152.pdfIn PDF document text
    • https://zd407.com/ocean_shop1/admin/upload/files/https-www-roblox-hack_GM431946152.pdfIn PDF document text
    • https://zd407.com/ocean_shop1/admin/upload/files/app-master_GM406889139.pdfIn PDF document text
    • https://zd407.com/ocean_shop1/admin/upload/files/can-you-cheat-in-roblox_GM431946152.pdfIn PDF document text
    • https://zd407.com/ocean_shop1/admin/upload/files/coin-master-hack-apk-app_GM406889139.pdfIn PDF document text
    • https://zd407.com/ocean_shop1/admin/upload/files/minecraft-hacked-apk_GM479516143.pdfIn PDF document text
    • https://zd407.com/ocean_shop1/admin/upload/files/coin-master-apk-hack-mod-download_GM406889139.pdfIn PDF document text
    • https://zd407.com/ocean_shop1/admin/upload/files/free-tiktok-jelly-fruit_GM835599320.pdfIn PDF document text
    • https://zd407.com/ocean_shop1/admin/upload/files/minecraft-server-hacks_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
font_00_sfnt_off000031cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x31CF 21944 bytes
SHA-256: 027871b202b0139222dcbcb43fcdff63b3286dd7653ddc8c3eb4ccabfb898151
font_01_sfnt_off000061db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x61DB 19604 bytes
SHA-256: 58b409e880d8c8c8f611c8851265b785a46b2984af904f55916f4ac6f211fe18

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