Malicious PDF — malware analysis report

Static analysis result for SHA-256 ca946bb8aa621a1b…

MALICIOUS

PDF

44.6 KB Created: 2021-05-15 01:31:50 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: fd49b70090ff72d72532330e1d7085fb SHA-1: 02f428af6c279137cfae18ade76fba6ceddbff48 SHA-256: ca946bb8aa621a1b8fc1c57e553da2133c8dee0ea1e67907036ba5ffbd965644
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links designed to lure users with promises of free Robux and game hacks. One primary link, 'https://netcdn.xyz/app/431946152/free-robux-websites-that-actually-work-game-hack', is identified as a malicious redirector. The document body, though partially corrupted, also contains this URL and other links pointing to potentially malicious content, indicating a phishing or scam attempt.

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 https://netcdn.xyz/app/431946152/free-robux-websites-that-actually-work-game-hack In PDF document text
    • https://xiangquan.com.tw/image/data/files/2021-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://xiangquan.com.tw/image/data/files/coin-master-hackcom-xyz_GM406889139.pdfIn PDF document text
    • https://xiangquan.com.tw/image/data/files/coin-master-tricks_GM406889139.pdfIn PDF document text
    • https://xiangquan.com.tw/image/data/files/robux-sites_GM431946152.pdfIn PDF document text
    • https://xiangquan.com.tw/image/data/files/free-spins-coin-master-links_GM406889139.pdfIn PDF document text
    • https://xiangquan.com.tw/image/data/files/how-to-hack-roblox-for-robux_GM431946152.pdfIn PDF document text
    • https://xiangquan.com.tw/image/data/files/roblox-phantom-forces-hack_GM431946152.pdfIn PDF document text
    • https://xiangquan.com.tw/image/data/files/mcpe-master-coins-hack_GM406889139.pdfIn PDF document text
    • https://xiangquan.com.tw/image/data/files/coin-master-hack-apk-online_GM406889139.pdfIn PDF document text
    • https://xiangquan.com.tw/image/data/files/play-minecraft-for-free-on-pc_GM479516143.pdfIn PDF document text
    • https://xiangquan.com.tw/image/data/files/minecraft-windows-10-edition-free_GM479516143.pdfIn PDF document text
    • https://xiangquan.com.tw/image/data/files/how-to-hack-people-on-roblox_GM431946152.pdfIn PDF document text
    • https://xiangquan.com.tw/image/data/files/free-minecraft-packs_GM479516143.pdfIn PDF document text
    • https://xiangquan.com.tw/image/data/files/free-spins-coin-master-hack-2021_GM406889139.pdfIn PDF document text
    • https://xiangquan.com.tw/image/data/files/roblox-arsenal-hack-script-pastebin_GM431946152.pdfIn PDF document text
    • https://xiangquan.com.tw/image/data/files/coin-master-free-spin-facebook-link_GM406889139.pdfIn PDF document text
    • https://xiangquan.com.tw/image/data/files/can-i-hack-coin-master-with-lucky-patcher_GM406889139.pdfIn PDF document text
    • https://xiangquan.com.tw/image/data/files/free-coin-master-spins-no-human-verification_GM406889139.pdfIn PDF document text
    • https://xiangquan.com.tw/image/data/files/easy-roblox-today_GM431946152.pdfIn PDF document text
    • https://xiangquan.com.tw/image/data/files/how-do-we-get-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
stream_003_off00004d1b.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4D1B 26240 bytes
SHA-256: 3a49b3d5d3b6f1b1b4a1f0c2ebdda71fb031338674fc228e1e67f828bb94908c
font_01_sfnt_off00008927.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8927 19252 bytes
SHA-256: f49525d2cb353299e95430044cca9c62699809686ebb763340304ea0e82a2cbb

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