Malicious PDF — malware analysis report

Static analysis result for SHA-256 4b98f29abedfa2c0…

MALICIOUS

PDF

45.8 KB Created: 2021-05-17 18:01:30 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: cbcd87c3b1d622d3a94b7109c1f7c040 SHA-1: 7a4f865583839ee055e3ec0c4cf9703e60375fe0 SHA-256: 4b98f29abedfa2c0912a83853e086f073a140be2d29f98a5d2d84be016532018
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains embedded links that redirect to malicious infrastructure, specifically promoting "game hacks" and "free Robux". The document body and heuristics indicate a lure for potentially unwanted or malicious content. While no scripts were explicitly extracted, the PDF structure and embedded URLs strongly suggest an attempt to redirect the user to a malicious site, likely for further exploitation or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9432

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/get-more-robux-game-hack In PDF document text
    • https://xiangquan.com.tw/image/data/files/coins-master-hack_GM406889139.pdfIn PDF document text
    • https://xiangquan.com.tw/image/data/files/hacks-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://xiangquan.com.tw/image/data/files/google-play-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • https://xiangquan.com.tw/image/data/files/you-promised-my-son-free-robux_GM431946152.pdfIn PDF document text
    • https://xiangquan.com.tw/image/data/files/how-to-hack-someones-roblox-account-2021_GM431946152.pdfIn PDF document text
    • https://xiangquan.com.tw/image/data/files/coin-master-village-4_GM406889139.pdfIn PDF document text
    • https://xiangquan.com.tw/image/data/files/best-minecraft-hacks_GM479516143.pdfIn PDF document text
    • https://xiangquan.com.tw/image/data/files/roblox-lovenet_GM431946152.pdfIn PDF document text
    • https://xiangquan.com.tw/image/data/files/free-robux-codes-no-verification-2021_GM431946152.pdfIn PDF document text
    • https://xiangquan.com.tw/image/data/files/free-roblox-card_GM431946152.pdfIn PDF document text
    • https://xiangquan.com.tw/image/data/files/free-robux-app-2021_GM431946152.pdfIn PDF document text
    • https://xiangquan.com.tw/image/data/files/free-minecraft-java-server_GM479516143.pdfIn PDF document text
    • https://xiangquan.com.tw/image/data/files/roblox-report-hacker_GM431946152.pdfIn PDF document text
    • https://xiangquan.com.tw/image/data/files/free-robux-codes-2021_GM431946152.pdfIn PDF document text
    • https://xiangquan.com.tw/image/data/files/how-to-win-attack-madness-in-coin-master-hack_GM406889139.pdfIn PDF document text
    • https://xiangquan.com.tw/image/data/files/how-do-you-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • https://xiangquan.com.tw/image/data/files/coin-master-free-spin-whatsapp-group_GM406889139.pdfIn PDF document text
    • https://xiangquan.com.tw/image/data/files/coin-master-hack-iphone_GM406889139.pdfIn PDF document text
    • https://xiangquan.com.tw/image/data/files/minecraft-for-chromebook-free_GM479516143.pdfIn PDF document text
    • https://xiangquan.com.tw/image/data/files/how-to-get-free-robux-easy-2021_GM431946152.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_off00004b97.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4B97 25632 bytes
SHA-256: d6a0cff01888bc599c700d71f687143ce227dccfdbb68697b74395d957630524
font_01_sfnt_off000086d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x86D3 2912 bytes
SHA-256: 02b35010e2614e3cc95ac6414c49295350c91fdfcc4b4cad27ffdbc10e80df7f
font_02_sfnt_off000090cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x90CF 18152 bytes
SHA-256: 3f0afb5031a6524980f5b4f14d61315d560e84a079a8a334c40e6e2be07f7597

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