Malicious PDF — malware analysis report

Static analysis result for SHA-256 ebda1db096236efb…

MALICIOUS

PDF

47.1 KB Created: 2021-06-07 11:40:46 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: d414cbbd22cc5b5555d5b5facf6a520e SHA-1: 5af38fed4f3c7000393e7243226d075f334d3e84 SHA-256: ebda1db096236efbe5771fee0bbeee39ab4d7331484cc145cf07af0cb0eadd38
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to malicious redirectors, disguised as game cheats and hacks for popular games like Roblox. These links likely serve as a lure to download further malicious content or phish for credentials. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9832

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/roblox-cheats-for-money-on-ipad-game-hack In PDF document text
    • http://niceviaapia.com.br/images/ckfinder/files/how-to-hack-a-roblox-account-2021_GM431946152.pdfIn PDF document text
    • http://niceviaapia.com.br/images/ckfinder/files/how-to-hack-someones-account-on-roblox_GM431946152.pdfIn PDF document text
    • http://niceviaapia.com.br/images/ckfinder/files/games-that-give-you-free-robux_GM431946152.pdfIn PDF document text
    • http://niceviaapia.com.br/images/ckfinder/files/is-there-a-way-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://niceviaapia.com.br/images/ckfinder/files/free-robux-without-human-verification-2021_GM431946152.pdfIn PDF document text
    • http://niceviaapia.com.br/images/ckfinder/files/strucid-aimbot_GM431946152.pdfIn PDF document text
    • http://niceviaapia.com.br/images/ckfinder/files/roblox-robux-hack_GM431946152.pdfIn PDF document text
    • http://niceviaapia.com.br/images/ckfinder/files/coin-master-free-spins-today-daily-links_GM406889139.pdfIn PDF document text
    • http://niceviaapia.com.br/images/ckfinder/files/coinmaster-spin-ml_GM406889139.pdfIn PDF document text
    • http://niceviaapia.com.br/images/ckfinder/files/how-to-win-free-robux_GM431946152.pdfIn PDF document text
    • http://niceviaapia.com.br/images/ckfinder/files/win-free-robux_GM431946152.pdfIn PDF document text
    • http://niceviaapia.com.br/images/ckfinder/files/coin-master-free-spin-and-coin_GM406889139.pdfIn PDF document text
    • http://niceviaapia.com.br/images/ckfinder/files/coin-master-links-for-free-spins-2021_GM406889139.pdfIn PDF document text
    • http://niceviaapia.com.br/images/ckfinder/files/free-magical-chest-coin-master_GM406889139.pdfIn PDF document text
    • http://niceviaapia.com.br/images/ckfinder/files/free-robux-com-roblox_GM431946152.pdfIn PDF document text
    • http://niceviaapia.com.br/images/ckfinder/files/free-robux-pastebin_GM431946152.pdfIn PDF document text
    • http://niceviaapia.com.br/images/ckfinder/files/how-do-you-get-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • http://niceviaapia.com.br/images/ckfinder/files/free-free-robux_GM431946152.pdfIn PDF document text
    • http://niceviaapia.com.br/images/ckfinder/files/www-bandicam-com-free-robux_GM431946152.pdfIn PDF document text
    • http://niceviaapia.com.br/images/ckfinder/files/coin-master-free-spins-link-today-hack_GM406889139.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_off0000517e.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x517E 28448 bytes
SHA-256: 23201a4e374230c9e61d9e902559b5bc70fa883290b6ee4b6f24af062db0e82d
font_01_sfnt_off00009324.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9324 19172 bytes
SHA-256: d788d1f356d396a65a7f516fc6324a37dfd813d6fbcbac925c090f95100e7ae3