Malicious PDF — malware analysis report

Static analysis result for SHA-256 0ca9ae21ca484cba…

MALICIOUS

PDF

34.6 KB Created: 2021-07-05 04:48:39 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-16
MD5: f2ae4d425fc7ba771fb05c7a6a4b6044 SHA-1: 0daf2c87a80d4e68126733c1c7da295368ae4047 SHA-256: 0ca9ae21ca484cba50e282b29912004836f05c61c9f0838d5965bef82b6cb933
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF document contains numerous links to external websites, many of which are hosted on domains related to educational institutions but appear to be part of a link farm. The primary URL, http://netcdn.tw/app/431946152/roblox-toolbox-hack-download-game-hack, suggests a lure for downloading game hacks. The ML classifier strongly flagged this PDF as malicious, and the presence of a "download button" heuristic further supports the malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 4

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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.tw/app/431946152/roblox-toolbox-hack-download-game-hack PDF link annotation
    • http://study.mtsn3limapuluhkota.sch.id/__statics/gudangsoal/files/games-like-roblox-online-free_GM431946152.pdfIn PDF document text
    • http://study.mtsn3limapuluhkota.sch.id/__statics/gudangsoal/files/robux-hack-give-250k_GM431946152.pdfIn PDF document text
    • http://study.mtsn3limapuluhkota.sch.id/__statics/gudangsoal/files/roblox-hack-robux-ofcial-site_GM431946152.pdfIn PDF document text
    • http://study.mtsn3limapuluhkota.sch.id/__statics/gudangsoal/files/coin-master-game-hack-version-download_GM406889139.pdfIn PDF document text
    • http://study.mtsn3limapuluhkota.sch.id/__statics/gudangsoal/files/mcpe-master-hack-unlimited-coins-latest-version_GM406889139.pdfIn PDF document text
    • http://study.mtsn3limapuluhkota.sch.id/__statics/gudangsoal/files/how-to-get-hacks-on-minecraft_GM479516143.pdfIn PDF document text
    • http://study.mtsn3limapuluhkota.sch.id/__statics/gudangsoal/files/free-robux-codes-no-human-verification_GM431946152.pdfIn PDF document text
    • http://study.mtsn3limapuluhkota.sch.id/__statics/gudangsoal/files/minecraft-free-games-no-download_GM479516143.pdfIn PDF document text
    • http://study.mtsn3limapuluhkota.sch.id/__statics/gudangsoal/files/robloxian-roblox-hack_GM431946152.pdfIn PDF document text
    • http://study.mtsn3limapuluhkota.sch.id/__statics/gudangsoal/files/roblox-com-free_GM431946152.pdfIn PDF document text
    • http://study.mtsn3limapuluhkota.sch.id/__statics/gudangsoal/files/coin-master-free-spins--coins-2021_GM406889139.pdfIn PDF document text
    • http://study.mtsn3limapuluhkota.sch.id/__statics/gudangsoal/files/roblox-speed-hack-cheat-engine-vermillion_GM431946152.pdfIn PDF document text
    • http://study.mtsn3limapuluhkota.sch.id/__statics/gudangsoal/files/free-robux-without-downloading-apps_GM431946152.pdfIn PDF document text
    • http://study.mtsn3limapuluhkota.sch.id/__statics/gudangsoal/files/get-free-robux-without-offers_GM431946152.pdfIn PDF document text
    • http://study.mtsn3limapuluhkota.sch.id/__statics/gudangsoal/files/roblox-hack-exploit-spvx-2021_GM431946152.pdfIn PDF document text
    • http://study.mtsn3limapuluhkota.sch.id/__statics/gudangsoal/files/hot-to-get-real-robux-for-free_GM431946152.pdfIn PDF document text
    • http://study.mtsn3limapuluhkota.sch.id/__statics/gudangsoal/files/hacked-roblox-accounts-list_GM431946152.pdfIn PDF document text
    • http://study.mtsn3limapuluhkota.sch.id/__statics/gudangsoal/files/is-minecraft-java-free_GM479516143.pdfIn PDF document text
    • http://study.mtsn3limapuluhkota.sch.id/__statics/gudangsoal/files/free-spin-link-for-coin-master-game_GM406889139.pdfIn PDF document text
    • http://study.mtsn3limapuluhkota.sch.id/__statics/gudangsoal/files/coin-master-hack-android-2021_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00003047.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3047 22380 bytes
SHA-256: fec6e18578654981716afbcdf095a2811324a141f0b3251c8e339f0e45f60b71
font_01_sfnt_off00006206.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6206 18976 bytes
SHA-256: 324d654d605eaf089ab791aa984f9d43a5cfff27df397665c5ea36fc80c17ce7

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