Malicious PDF — malware analysis report

Static analysis result for SHA-256 a3bbecbd494f69e6…

MALICIOUS

PDF

34.2 KB Created: 2021-07-01 16:53:08 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 9ea05d9f2604c1c8c267b9af289f0d90 SHA-1: a72ca848236eb4b51767ff451a136a31cb2fce87 SHA-256: a3bbecbd494f69e6c45a0b36bf83e6869a06d28302d8bc2cb85fcf6940a0ce32
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a high-confidence heuristic indicating it links to a 'free generator / game hack' redirector, specifically http://netcdn.co/app/431946152/get-robux-for-free-2021-game-hack. This lure is designed to trick users into visiting a potentially malicious site. While no scripts were extracted, the document's structure and embedded URLs strongly suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector high 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.
  • 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
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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/get-robux-for-free-2021-game-hack PDF link annotation
    • https://elibrary.ikhac.ac.id/repository/minecraft-nintendo-switch-digital-code-free_GM479516143.pdfIn PDF document text
    • https://elibrary.ikhac.ac.id/repository/addrbx-earn-free-robux_GM431946152.pdfIn PDF document text
    • https://elibrary.ikhac.ac.id/repository/free-robux-rbx-place-rewards_GM431946152.pdfIn PDF document text
    • https://elibrary.ikhac.ac.id/repository/free-op-roblox-accounts_GM431946152.pdfIn PDF document text
    • https://elibrary.ikhac.ac.id/repository/free-minecraft-mods_GM479516143.pdfIn PDF document text
    • https://elibrary.ikhac.ac.id/repository/roblox-its-free-gif_GM431946152.pdfIn PDF document text
    • https://elibrary.ikhac.ac.id/repository/robux-hack-descargar_GM431946152.pdfIn PDF document text
    • https://elibrary.ikhac.ac.id/repository/best-hack-roblox_GM431946152.pdfIn PDF document text
    • https://elibrary.ikhac.ac.id/repository/truco-2021-hack-robux_GM431946152.pdfIn PDF document text
    • https://elibrary.ikhac.ac.id/repository/roblox-build-battle-hack_GM431946152.pdfIn PDF document text
    • https://elibrary.ikhac.ac.id/repository/roblox-free-avatar-creator_GM431946152.pdfIn PDF document text
    • https://elibrary.ikhac.ac.id/repository/minecraft-java-edition-code-free_GM479516143.pdfIn PDF document text
    • https://elibrary.ikhac.ac.id/repository/roblox-noclip-hack-november-2021_GM431946152.pdfIn PDF document text
    • https://elibrary.ikhac.ac.id/repository/earn-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • https://elibrary.ikhac.ac.id/repository/free-robux-obby_GM431946152.pdfIn PDF document text
    • https://elibrary.ikhac.ac.id/repository/free-spin-link-for-coin-master-game_GM406889139.pdfIn PDF document text
    • https://elibrary.ikhac.ac.id/repository/full-throttle-hack-script-roblox_GM431946152.pdfIn PDF document text
    • https://elibrary.ikhac.ac.id/repository/go-thru-walls-hack-for-roblox_GM431946152.pdfIn PDF document text
    • https://elibrary.ikhac.ac.id/repository/minecraft-windows-10-free-trial_GM479516143.pdfIn PDF document text
    • https://elibrary.ikhac.ac.id/repository/websites-that-give-you-free-robux_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
font_00_sfnt_off00002fe0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2FE0 21816 bytes
SHA-256: d867645723c23ab018a6e4e6fee2b4d46bbca894905419a3670678605cdc8e1d
font_01_sfnt_off00005ffd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5FFD 19224 bytes
SHA-256: c7e6ea762fc2e85d80aa6669a0bc8c0fc47ec2f37a4be0fa16c010cf46ec438a

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