Malicious PDF — malware analysis report

Static analysis result for SHA-256 b235e362d0ba8a10…

MALICIOUS

PDF

48.9 KB Created: 2021-05-13 06:07:13 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 2bcca5fec945938d5be4d1faffd1c13a SHA-1: f99a3d183311de9f9771d1c41a5215e6ec7ea20e SHA-256: b235e362d0ba8a10afe8f13ce82e04e3e4a203f21c96c33f6d13cb500bf02be5
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains lures for free game currency, specifically 'Free Roebucks in Roblox', which redirects to a known malicious URL. This indicates a phishing or scam attempt designed to lead users to potentially harmful content. The presence of multiple redirector links and a high ML classifier score further support its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9228

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/how-to-get-free-roebucks-in-roblox-game-hack In PDF document text
    • http://korporacjaroma.pl/images/free-robux-codes-2021_GM431946152.pdfIn PDF document text
    • http://korporacjaroma.pl/images/free-robux-survey_GM431946152.pdfIn PDF document text
    • http://korporacjaroma.pl/images/coin-master-spins-free-2021_GM406889139.pdfIn PDF document text
    • http://korporacjaroma.pl/images/free-robux-place_GM431946152.pdfIn PDF document text
    • http://korporacjaroma.pl/images/roblox-sexually-abused_GM431946152.pdfIn PDF document text
    • http://korporacjaroma.pl/images/what-games-on-roblox-give-you-free-robux_GM431946152.pdfIn PDF document text
    • http://korporacjaroma.pl/images/is-minecraft-free-on-pc_GM479516143.pdfIn PDF document text
    • http://korporacjaroma.pl/images/how-to-hack-coin-master-apple_GM406889139.pdfIn PDF document text
    • http://korporacjaroma.pl/images/hack-version-of-coin-master_GM406889139.pdfIn PDF document text
    • http://korporacjaroma.pl/images/free-spin-coin-master-link-download_GM406889139.pdfIn PDF document text
    • http://korporacjaroma.pl/images/free-draw-roblox_GM431946152.pdfIn PDF document text
    • http://korporacjaroma.pl/images/free-spin-gratis-coin-master_GM406889139.pdfIn PDF document text
    • http://korporacjaroma.pl/images/coin-master-com_GM406889139.pdfIn PDF document text
    • http://korporacjaroma.pl/images/how-to-get-minecraft-for-free-on-xbox_GM479516143.pdfIn PDF document text
    • http://korporacjaroma.pl/images/op-rewards-free-robux_GM431946152.pdfIn PDF document text
    • http://korporacjaroma.pl/images/coin-master-free-coin-hack_GM406889139.pdfIn PDF document text
    • http://korporacjaroma.pl/images/roblox-group-free-robux_GM431946152.pdfIn PDF document text
    • http://korporacjaroma.pl/images/mcpe-client_GM479516143.pdfIn PDF document text
    • http://korporacjaroma.pl/images/how-to-get-free-robux-by-playing-games_GM431946152.pdfIn PDF document text
    • http://korporacjaroma.pl/images/free-foxy-food-coin-master_GM406889139.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_off00004872.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4872 32028 bytes
SHA-256: b66316f05d6988eb06de246daa75825582c37493ea9b1781d016ec7d0b93291e
font_01_sfnt_off00008f26.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8F26 3988 bytes
SHA-256: 1ba32a5139c6de22584ee0f72d573162a644f7c4206fa3a2a8dea775e8e2a087
font_02_sfnt_off00009c42.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9C42 18524 bytes
SHA-256: 6a418ba74ae5328d563bd5a35238a9b9c08fdc9000a9cbda284a157467e29bc0

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