Malicious PDF — malware analysis report

Static analysis result for SHA-256 ac69ddf451f0c902…

MALICIOUS

PDF

43.5 KB Created: 2021-06-10 22:18:17 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: b05e3276077c899088d2bf50d6a019fb SHA-1: dc444d612a6c8a8715366546a32367ba8e2c142c SHA-256: ac69ddf451f0c9028a5b16e6f4c7f390cfbc2a20d1d31aceb5a0b22bc69e006e
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to known malicious redirectors and infrastructure, masquerading as game hacks or generators. The primary lure directs users to 'https://netcdn.tw/app/431946152/hacks-roblox-game-hack', which likely serves as a gateway to a malicious payload. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

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.tw/app/431946152/hacks-roblox-game-hack In PDF document text
    • http://meisterhaus-guterl.de/images/roblox-phantom-forces-hack_GM431946152.pdfIn PDF document text
    • http://meisterhaus-guterl.de/images/how-to-get-minecraft-windows-10-edition-for-free_GM479516143.pdfIn PDF document text
    • http://meisterhaus-guterl.de/images/hacker-roblox-2021_GM431946152.pdfIn PDF document text
    • http://meisterhaus-guterl.de/images/roblox-games-free-items_GM431946152.pdfIn PDF document text
    • http://meisterhaus-guterl.de/images/coin-master-free-spins-daily-2021_GM406889139.pdfIn PDF document text
    • http://meisterhaus-guterl.de/images/how-to-get-free-clothing-on-roblox_GM431946152.pdfIn PDF document text
    • http://meisterhaus-guterl.de/images/what-tiktok-free-fans_GM835599320.pdfIn PDF document text
    • http://meisterhaus-guterl.de/images/coin-master-daily-free-spin-app_GM406889139.pdfIn PDF document text
    • http://meisterhaus-guterl.de/images/how-to-install-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://meisterhaus-guterl.de/images/how-to-get-free-robux-no-hack-or-download-2021_GM431946152.pdfIn PDF document text
    • http://meisterhaus-guterl.de/images/how-to-get-free-robux-on-ipad_GM431946152.pdfIn PDF document text
    • http://meisterhaus-guterl.de/images/tiktok-followers-for-free_GM835599320.pdfIn PDF document text
    • http://meisterhaus-guterl.de/images/coin-master-links-free-spins_GM406889139.pdfIn PDF document text
    • http://meisterhaus-guterl.de/images/mosttechs-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://meisterhaus-guterl.de/images/how-to-get-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • http://meisterhaus-guterl.de/images/how-to-get-free-robux-no-verification_GM431946152.pdfIn PDF document text
    • http://meisterhaus-guterl.de/images/roblox-weapons-for-free_GM431946152.pdfIn PDF document text
    • http://meisterhaus-guterl.de/images/free-robux-com-no-verification_GM431946152.pdfIn PDF document text
    • http://meisterhaus-guterl.de/images/coin-master-hack-apk-with-fb-login_GM406889139.pdfIn PDF document text
    • http://meisterhaus-guterl.de/images/how-to-get-free-robux-on-roblox-2021_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_004_off00005034.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5034 24140 bytes
SHA-256: 7ed7bd51c8a6158789a56b84900d58febcf384d1ae7f9bc0a5bd3bf18e5aaedf
font_01_sfnt_off00008752.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8752 18184 bytes
SHA-256: 7ce99462d7db30d9d686f16fdffa062e1f918298e62a3f0da8fa4bf2d2fabb79

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