Malicious PDF — malware analysis report

Static analysis result for SHA-256 403424517321bde5…

MALICIOUS

PDF

34.4 KB Created: 2021-07-05 05:01:29 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: e04d1c44f4e9dd00cffaa6e8381bc755 SHA-1: 310ebd8f1b339d7f3bd8ddc79e8501b9562504ea SHA-256: 403424517321bde5572efa6d31b37032bfa38bc350e7a353541a2cfe26aa6d64
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains embedded links that lead to a known malicious redirector infrastructure, specifically advertising free in-game currency or hacks. The document body and heuristics confirm the lure is related to popular games like Roblox. The primary malicious URL identified is http://netcdn.tw/app/431946152/free-robux-instantly-game-hack, which is likely used to deliver a secondary payload or phish for credentials.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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 http://netcdn.tw/app/431946152/free-robux-instantly-game-hack In PDF document text
    • https://opac.itp.ac.id/repository/free-robux-robloxbloob_GM431946152.pdfIn PDF document text
    • https://opac.itp.ac.id/repository/free-roblox-obc-generator_GM431946152.pdfIn PDF document text
    • https://opac.itp.ac.id/repository/mcpe-116_GM479516143.pdfIn PDF document text
    • https://opac.itp.ac.id/repository/how-to-get-prison-life-hacks-roblox_GM431946152.pdfIn PDF document text
    • https://opac.itp.ac.id/repository/free-roblox-account-with-ridable-pets_GM431946152.pdfIn PDF document text
    • https://opac.itp.ac.id/repository/free-robux-groups-2021_GM431946152.pdfIn PDF document text
    • https://opac.itp.ac.id/repository/microsoft-free-robux_GM431946152.pdfIn PDF document text
    • https://opac.itp.ac.id/repository/nuevos-hacks-de-roblox_GM431946152.pdfIn PDF document text
    • https://opac.itp.ac.id/repository/coin-master-hack-without-verification_GM406889139.pdfIn PDF document text
    • https://opac.itp.ac.id/repository/roblox-hack-penis_GM431946152.pdfIn PDF document text
    • https://opac.itp.ac.id/repository/coin-master-free-gold-cards-link_GM406889139.pdfIn PDF document text
    • https://opac.itp.ac.id/repository/games-for-robux_GM431946152.pdfIn PDF document text
    • https://opac.itp.ac.id/repository/roblox-meepcity-hacked_GM431946152.pdfIn PDF document text
    • https://opac.itp.ac.id/repository/free-robux-codes-that-are-not-used_GM431946152.pdfIn PDF document text
    • https://opac.itp.ac.id/repository/free-robux-no-survey-no-human-verification-2021_GM431946152.pdfIn PDF document text
    • https://opac.itp.ac.id/repository/tiktok-minecraft-hacks_GM479516143.pdfIn PDF document text
    • https://opac.itp.ac.id/repository/hacker-de-roblox-jailbreak-2021_GM431946152.pdfIn PDF document text
    • https://opac.itp.ac.id/repository/minecraft-windows-10-edition-free-download_GM479516143.pdfIn PDF document text
    • https://opac.itp.ac.id/repository/best-level-7-free-script-injectors-roblox_GM431946152.pdfIn PDF document text
    • https://opac.itp.ac.id/repository/are-there-any-actual-robux-cheats-reddit_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_002_off00002f00.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x2F00 22552 bytes
SHA-256: 96df52defe4df2a91f4f8ea7b26539d099b806e0074b7878806de98f3fb3fbd5
font_01_sfnt_off00006168.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6168 19072 bytes
SHA-256: 2ca9d11195de567abf4a703037006073732e9aee935d3c5754ca148439903055

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