Malicious PDF — malware analysis report

Static analysis result for SHA-256 a3fba90d490a205b…

MALICIOUS

PDF

34.9 KB Created: 2021-06-26 00:45:29 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: d9a1de4268e90a007d92a4fcb1571531 SHA-1: 8cd8c8f4ad8966aa00f026ab9f7b4e4a9f68ea54 SHA-256: a3fba90d490a205b1d3e001c7e69fb321d8ccbc5df38482f5ccc3595e36fc303
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document employs a lure related to game hacks and free in-game currency to trick users into clicking malicious links. The primary malicious link identified, http://netcdn.co/app/431946152/como-hackear-cuentas-de-roblox-sin-programas-game-hack, is hosted on known malicious redirector infrastructure. While no scripts were explicitly extracted, the PDF structure and embedded URLs strongly indicate a phishing or redirection attempt, likely leading to further malware download or credential harvesting.

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/como-hackear-cuentas-de-roblox-sin-programas-game-hack In PDF document text
    • https://lib.unitri.ac.id//repository/minecraft-life-hacks_GM479516143.pdfIn PDF document text
    • https://lib.unitri.ac.id/repository/counter-blox-roblox-offensive-hacks-download-2021_GM431946152.pdfIn PDF document text
    • https://lib.unitri.ac.id/repository/coin-master-hack-apk-download-for-android-mobile_GM406889139.pdfIn PDF document text
    • https://lib.unitri.ac.id/repository/hack-week-for-roblox_GM431946152.pdfIn PDF document text
    • https://lib.unitri.ac.id/repository/5-real-roblox-games-that-give-free-robux_GM431946152.pdfIn PDF document text
    • https://lib.unitri.ac.id/repository/trigon-roblox-hack_GM431946152.pdfIn PDF document text
    • https://lib.unitri.ac.id/repository/haktuts-2021-coin-master-free-spin-link_GM406889139.pdfIn PDF document text
    • https://lib.unitri.ac.id//repository/100-robux_GM431946152.pdfIn PDF document text
    • https://lib.unitri.ac.id/repository/auto-clicker-download-roblox-bloxburg-free_GM431946152.pdfIn PDF document text
    • https://lib.unitri.ac.id/repository/roblox-robux-hack-2021-no-survey_GM431946152.pdfIn PDF document text
    • https://lib.unitri.ac.id//repository/hack-coin-master-apk_GM406889139.pdfIn PDF document text
    • https://lib.unitri.ac.id//repository/free-roblox-accounts-that-work_GM431946152.pdfIn PDF document text
    • https://lib.unitri.ac.id/repository/roblox-hacking-computer-destroyed_GM431946152.pdfIn PDF document text
    • https://lib.unitri.ac.id/repository/how-to-get-minecraft-for-free-on-tablet_GM479516143.pdfIn PDF document text
    • https://lib.unitri.ac.id/repository/minecraft-bedrock-edition-download-pc-free_GM479516143.pdfIn PDF document text
    • https://lib.unitri.ac.id/repository/best-hacked-client_GM479516143.pdfIn PDF document text
    • https://lib.unitri.ac.id/repository/download-roblox-for-free-unlockable-game_GM431946152.pdfIn PDF document text
    • https://lib.unitri.ac.id/repository/free-lua-7-exploit-roblox_GM431946152.pdfIn PDF document text
    • https://lib.unitri.ac.id/repository/free-tiktok-fans-no-verification_GM835599320.pdfIn PDF document text
    • https://lib.unitri.ac.id/repository/do-you-get-minecraft-windows-10-for-free_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_off000030bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x30BD 22168 bytes
SHA-256: d1a8ff14a0ea7c0ea28a86389f4c908f1dd7395b3b51283ba180c994abe5e7ea
font_01_sfnt_off000061f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x61F0 19604 bytes
SHA-256: 5691d18613e91351b801f0dc19da3117fc0450c56a6408aabf5aea0f58f7ffca

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