Malicious PDF — malware analysis report

Static analysis result for SHA-256 2b64636912be1243…

MALICIOUS

PDF

43.2 KB Created: 2021-05-17 05:16:48 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-17
MD5: 6bd2b3a2d908027cb845c8507853c7da SHA-1: 541312a03fbf118f99fb797d2911ae727f47e278 SHA-256: 2b64636912be124331be8ecf5fbea8bce7cc78af0089725780d923bd1a0cdbf9
160 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9969

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/406889139/apps-for-free-spins-on-coin-master-game-hack In PDF document text
    • http://ecotherm-01.eu/images/free-robux-group_GM431946152.pdfIn PDF document text
    • http://ecotherm-01.eu/images/how-to-hack-coin-master-computer_GM406889139.pdfIn PDF document text
    • http://ecotherm-01.eu/images/free-minecraft-coins_GM479516143.pdfIn PDF document text
    • http://ecotherm-01.eu/images/how-to-get-free-roebucks-on-roblox_GM431946152.pdfIn PDF document text
    • http://ecotherm-01.eu/images/how-to-get-free-robux-promo-codes_GM431946152.pdfIn PDF document text
    • http://ecotherm-01.eu/images/free-robux-real_GM431946152.pdfIn PDF document text
    • http://ecotherm-01.eu/images/get-robux-today_GM431946152.pdfIn PDF document text
    • http://ecotherm-01.eu/images/how-to-get-minecraft-coins-for-free_GM479516143.pdfIn PDF document text
    • http://ecotherm-01.eu/images/free-roblox-accounts_GM431946152.pdfIn PDF document text
    • http://ecotherm-01.eu/images/free-coins-coin-master-today_GM406889139.pdfIn PDF document text
    • http://ecotherm-01.eu/images/how-to-get-free-robux-fast_GM431946152.pdfIn PDF document text
    • http://ecotherm-01.eu/images/best-free-minecraft-hacked-client_GM479516143.pdfIn PDF document text
    • http://ecotherm-01.eu/images/hack-coin-master-using-cheat-engine_GM406889139.pdfIn PDF document text
    • http://ecotherm-01.eu/images/how-to-get-free-robux-without-human-verification-2021_GM431946152.pdfIn PDF document text
    • http://ecotherm-01.eu/images/free-robux-generator-com-roblox-hack_GM431946152.pdfIn PDF document text
    • http://ecotherm-01.eu/images/best-tricks-co-robux_GM431946152.pdfIn PDF document text
    • http://ecotherm-01.eu/images/how-do-i-get-free-spins-in-coin-master_GM406889139.pdfIn PDF document text
    • http://ecotherm-01.eu/images/robux-no-survey_GM431946152.pdfIn PDF document text
    • http://ecotherm-01.eu/images/free-robux-survey_GM431946152.pdfIn PDF document text
    • http://ecotherm-01.eu/images/free-minecraft-capes_GM479516143.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_off00004b1d.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4B1D 26196 bytes
SHA-256: 1e92d101f4a44b16539d806a625605c6880b5f27e3617d10cbef60c0a1107ee3
font_01_sfnt_off000087b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x87B1 17884 bytes
SHA-256: 4c464f61b1c90f025791abcccc37e0b9138cef535f95a89d23eb43686dc6e6a1