Malicious PDF — malware analysis report

Static analysis result for SHA-256 699641d9f99ed57e…

MALICIOUS

PDF

47.8 KB Created: 2021-06-09 10:39:11 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 278744be98523fd324d56f1d34dec1ad SHA-1: fabc5c2f80d4f17409eaee82fd30cae6fae20d24 SHA-256: 699641d9f99ed57ec1a741a1ab0a7182d8397befc9af0f2986a346fee1719291
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to known malicious redirectors, specifically advertising 'free generators' and 'game hacks' for popular games like Roblox. The primary lure URL is https://netcdn.tw/app/431946152/www-claim-gg-to-earn-free-robux-game-hack, which is likely used to deliver a secondary payload or phish for credentials. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9769

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/www-claim-gg-to-earn-free-robux-game-hack In PDF document text
    • https://www.metal.hr/files/how-to-hack-roblox_GM431946152.pdfIn PDF document text
    • https://www.metal.hr/files/coin-master-hacks-no-verification_GM406889139.pdfIn PDF document text
    • https://www.metal.hr/files/coin-master-hack-online-link_GM406889139.pdfIn PDF document text
    • https://www.metal.hr/files/minecraft-java-edition-free-trial_GM479516143.pdfIn PDF document text
    • https://www.metal.hr/files/how-to-download-minecraft-hacks_GM479516143.pdfIn PDF document text
    • https://www.metal.hr/files/free-robux-without-verification-or-survey_GM431946152.pdfIn PDF document text
    • https://www.metal.hr/files/mega-roblox-hack-download_GM431946152.pdfIn PDF document text
    • https://www.metal.hr/files/how-to-get-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • https://www.metal.hr/files/coin-master-hack-co_GM406889139.pdfIn PDF document text
    • https://www.metal.hr/files/coin-master-hack-uk_GM406889139.pdfIn PDF document text
    • https://www.metal.hr/files/minecraft-free-exe_GM479516143.pdfIn PDF document text
    • https://www.metal.hr/files/free-robux-websites-2021_GM431946152.pdfIn PDF document text
    • https://www.metal.hr/files/blox-land-free-robux_GM431946152.pdfIn PDF document text
    • https://www.metal.hr/files/daily-coin-master-link_GM406889139.pdfIn PDF document text
    • https://www.metal.hr/files/free-minecraft-account-and-password-generator_GM479516143.pdfIn PDF document text
    • https://www.metal.hr/files/coin-master-gift-hack_GM406889139.pdfIn PDF document text
    • https://www.metal.hr/files/how-to-start-a-minecraft-server-for-free_GM479516143.pdfIn PDF document text
    • https://www.metal.hr/files/hack-coin-master-spin-android_GM406889139.pdfIn PDF document text
    • https://www.metal.hr/files/spin-rewards-coin-master_GM406889139.pdfIn PDF document text
    • https://www.metal.hr/files/bloxpink-free-robux_GM431946152.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_004_off00005016.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5016 25008 bytes
SHA-256: 0cd5e3725a231a6a862c4664de0aceb15c33cb4cc94825bcd2322b2a61a079cb
font_01_sfnt_off00008a38.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8A38 3096 bytes
SHA-256: d05729863dc05721ada29044278030255eeda038236568e8246a87d3a8573d6e
font_02_sfnt_off000094e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x94E4 19348 bytes
SHA-256: 6c8aa2bd696777b424cffe98c1c37b7aceb2d1b30a10c6ebb087e43f3f958d57