Malicious PDF — malware analysis report

Static analysis result for SHA-256 e4acf85138cd9220…

MALICIOUS

PDF

35.3 KB Created: 2021-07-06 10:58:25 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: ddf12b7c7c312739cf18ac44a7870725 SHA-1: 0fc789978392b20cce8f3531ebdbfd0ebaabae94 SHA-256: e4acf85138cd92206a9f6243c08835067e15e86377f9092d6a12375e78974214
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to redirector infrastructure, specifically advertising 'free generators' and 'game hacks' for popular games. The primary URL, http://netcdn.tw/app/479516143/minecraft-windows-10-edition-hacked-client-game-hack, is identified as a malicious redirector. While no scripts were explicitly extracted, the PDF structure and embedded URLs strongly suggest a social engineering tactic to trick users into downloading malware or visiting malicious sites.

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/479516143/minecraft-windows-10-edition-hacked-client-game-hack In PDF document text
    • http://astdubai.co/userfiles/files/blox-land-free-robux_GM431946152.pdfIn PDF document text
    • http://astdubai.co/userfiles/files/coin-master-daily-free-spins-and-coins_GM406889139.pdfIn PDF document text
    • http://astdubai.co/userfiles/files/the-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://astdubai.co/userfiles/files/how-do-u-get-free-robux_GM431946152.pdfIn PDF document text
    • http://astdubai.co/userfiles/files/free-vip-server-roblox_GM431946152.pdfIn PDF document text
    • http://astdubai.co/userfiles/files/coin-master-hacks_GM406889139.pdfIn PDF document text
    • http://astdubai.co/userfiles/files/free-robux-pastebin_GM431946152.pdfIn PDF document text
    • http://astdubai.co/userfiles/files/robux-generator-no-survey_GM431946152.pdfIn PDF document text
    • http://astdubai.co/userfiles/files/robux-hack-generator_GM431946152.pdfIn PDF document text
    • http://astdubai.co/userfiles/files/free-spin-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://astdubai.co/userfiles/files/free-minecraft-mods_GM479516143.pdfIn PDF document text
    • http://astdubai.co/userfiles/files/minecraft-building-hacks_GM479516143.pdfIn PDF document text
    • http://astdubai.co/userfiles/files/earn-free-robux_GM431946152.pdfIn PDF document text
    • http://astdubai.co/userfiles/files/hack-wekk-roblox_GM431946152.pdfIn PDF document text
    • http://astdubai.co/userfiles/files/is-minecraft-free-on-ps4_GM479516143.pdfIn PDF document text
    • http://astdubai.co/userfiles/files/mcpe-master-free-coins_GM406889139.pdfIn PDF document text
    • http://astdubai.co/userfiles/files/coin-master-daily-rewards_GM406889139.pdfIn PDF document text
    • http://astdubai.co/userfiles/files/free-roblox-items-codes_GM431946152.pdfIn PDF document text
    • http://astdubai.co/userfiles/files/free-robux-websites-that-work_GM431946152.pdfIn PDF document text
    • http://astdubai.co/userfiles/files/coin-master-free-coins-link_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00003276.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3276 22640 bytes
SHA-256: 719d9832c83b17dc001613464c4ffd1580144f2e7944eaf946f8d365c9223fdc
font_01_sfnt_off000064fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x64FE 19056 bytes
SHA-256: d3e249417e7d6b6debf2819e5c051993e8e705e996228ab86655a1783c56b8b3

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