Malicious PDF — malware analysis report

Static analysis result for SHA-256 383fa2eb388f38ab…

MALICIOUS

PDF

34.9 KB Created: 2021-06-25 12:46:22 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 4c88a33d549d44e5d5fd6766aaf907c8 SHA-1: 64de29a265b8e6f7058baaf9b56abbc6affe2627 SHA-256: 383fa2eb388f38abcfc8d1489a6f4a78f5175cba4c581bc5b9a05dbf85d57f76
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to known malicious redirector infrastructure, specifically advertising 'free generators' and 'game hacks' for popular games. The primary lure URL is http://netcdn.co/app/431946152/roblox-games-hack-script-paste-bin-game-hack, which likely leads to a further malicious download or exploit. The document body and embedded URLs reinforce this lure, aiming to trick users into visiting malicious sites.

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.co/app/431946152/roblox-games-hack-script-paste-bin-game-hack In PDF document text
    • http://perpus.masda.ac.id//repository/apps-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id//repository/coin-master-heaven-free-spins-and-coins_GM406889139.pdfIn PDF document text
    • http://perpus.masda.ac.id//repository/freespins-coin-master_GM406889139.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/cheating-hacks-for-coin-master_GM406889139.pdfIn PDF document text
    • http://perpus.masda.ac.id//repository/roblox-a_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/minecraft-java-free-download_GM479516143.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/free-robux-no-anti-bot-verification_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/how-do-i-get-free-spins-in-coin-master_GM406889139.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/how-to-get-free-robux-promo-codes_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id//repository/can-you-give-me-free-robux_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/free-modded-minecraft-server-hosting_GM479516143.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/rob-hacker-roblox_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id//repository/coin-master-hack-spins-android_GM406889139.pdfIn PDF document text
    • http://perpus.masda.ac.id//repository/moonactive-free-spins-2021_GM406889139.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/rbx-place-free-robux_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id//repository/pokemon-go-free-spoofing_GM1094591345.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/cheats-for-roblox-deathrun_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id//repository/tiktok-free-fans-2021_GM835599320.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/coin-master-free-400-spin-link_GM406889139.pdfIn PDF document text
    • http://perpus.masda.ac.id//repository/coin-master-daily-free-spins-link-facebook_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
font_00_sfnt_off00002e99.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2E99 22952 bytes
SHA-256: fcf41f03e4c26cf9f13fee8e0340ad932da74e0575a3aa95c32dfc1e5e9da932
font_01_sfnt_off0000620d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x620D 19468 bytes
SHA-256: 6dc2cda8e6fda5f04ae14a1c9a732303503bf2f110e91e5a598daacada936b18