Malicious PDF — malware analysis report

Static analysis result for SHA-256 9a75e9563adb0944…

MALICIOUS

PDF

34.5 KB Created: 2021-06-18 09:47:54 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: c0d89317ecb55629755ed72e36958f54 SHA-1: 2b5895567584fd9d9fbdb00a9d9b6635559fb613 SHA-256: 9a75e9563adb0944e199eb325c3e24e8871fafc61ecd522db148231e7f0cf0b7
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to known malicious redirectors and lures users with promises of game hacks and free in-game currency. The primary redirector URL is http://netcdn.co/app/431946152/hacks-roblox-android-game-hack, which leads to further malicious PDFs hosted on elib-s2.ubl.ac.id. This indicates a phishing or scam campaign designed to lead users to potentially harmful content.

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/hacks-roblox-android-game-hack In PDF document text
    • http://elib-s2.ubl.ac.id/repository/free-robux-discord_GM431946152.pdfIn PDF document text
    • http://elib-s2.ubl.ac.id/repository/roblox36com-free-robux_GM431946152.pdfIn PDF document text
    • http://elib-s2.ubl.ac.id/repository/v3rmillion-roblox-account-hack_GM431946152.pdfIn PDF document text
    • http://elib-s2.ubl.ac.id/repository/how-to-hack-roblox-accounts-for-robux_GM431946152.pdfIn PDF document text
    • http://elib-s2.ubl.ac.id/repository/roblox-cheats-for-tix_GM431946152.pdfIn PDF document text
    • http://elib-s2.ubl.ac.id/repository/how-to-hack-roblox_GM431946152.pdfIn PDF document text
    • http://elib-s2.ubl.ac.id/repository/free-parking-in-back-id-roblox_GM431946152.pdfIn PDF document text
    • http://elib-s2.ubl.ac.id/repository/tiktok-fame-free_GM835599320.pdfIn PDF document text
    • http://elib-s2.ubl.ac.id/repository/free-robux-no-human-verification-or-survey-2021_GM431946152.pdfIn PDF document text
    • http://elib-s2.ubl.ac.id/repository/how-to-hack-into-other-peoples-roblox-accounts-2021_GM431946152.pdfIn PDF document text
    • http://elib-s2.ubl.ac.id/repository/nonsense-diamond-roblox-hack_GM431946152.pdfIn PDF document text
    • http://elib-s2.ubl.ac.id/repository/give-me-free-robux_GM431946152.pdfIn PDF document text
    • http://elib-s2.ubl.ac.id/repository/how-to-hack-coin-master_GM406889139.pdfIn PDF document text
    • http://elib-s2.ubl.ac.id/repository/cheat-argent-sur-roblox-vehicle-simulator_GM431946152.pdfIn PDF document text
    • http://elib-s2.ubl.ac.id/repository/minecraft-story-mode-free_GM479516143.pdfIn PDF document text
    • http://elib-s2.ubl.ac.id/repository/coin-master-free-coins_GM406889139.pdfIn PDF document text
    • http://elib-s2.ubl.ac.id/repository/huskybuscom-free-robux_GM431946152.pdfIn PDF document text
    • http://elib-s2.ubl.ac.id/repository/how-to-destroy-roblox-place-with-cheat-engine_GM431946152.pdfIn PDF document text
    • http://elib-s2.ubl.ac.id/repository/free-minecraft-mods_GM479516143.pdfIn PDF document text
    • http://elib-s2.ubl.ac.id/repository/hacker-minecraft-song_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
font_00_sfnt_off00003106.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3106 22128 bytes
SHA-256: 81011d174ed76f8748bf857ca18e5a0fe9c2cf0f6be875ffd1a250be750a76f6
font_01_sfnt_off000061d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x61D9 18952 bytes
SHA-256: 60ed629492271778eb3c5c34aee381dad6a264568ee813171860c03ca923c5bf

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