Malicious PDF — malware analysis report

Static analysis result for SHA-256 7e56adc82a00dac9…

MALICIOUS

PDF

34.9 KB Created: 2021-07-05 06:14:31 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 378c5ce1eedb95951878463c7af48b00 SHA-1: e7732ace51c48501aa8ef012615bb31793ac324d SHA-256: 7e56adc82a00dac9e25403c179ffea314b53a088b7c96664e7c8b5ee49926297
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF file contains numerous embedded URLs, many of which are structured as SEO link farms pointing to game-related hacks and free items. One prominent URL, http://netcdn.tw/app/431946152/instantrobux-game-hack, suggests a lure for game cheats or exploits. The presence of a "download" call-to-action heuristic further supports the intent to trick users into downloading content. The ML classifier strongly flagged this PDF as malicious, indicating a high probability of 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/instantrobux-game-hack
    • http://laboratorium.sman2metro.sch.id//repository/free-coins-coin-master-2021_GM406889139.pdf
    • http://laboratorium.sman2metro.sch.id/repository/how-do-you-get-free-robux-2021_GM431946152.pdf
    • http://laboratorium.sman2metro.sch.id//repository/coin-master-fb-free-spins-link_GM406889139.pdf
    • http://laboratorium.sman2metro.sch.id//repository/coin-master-game-hack-kaise-kare_GM406889139.pdf
    • http://laboratorium.sman2metro.sch.id/repository/free-spins-coin-master-unlimited_GM406889139.pdf
    • http://laboratorium.sman2metro.sch.id/repository/blox-best-robux_GM431946152.pdf
    • http://laboratorium.sman2metro.sch.id/repository/coin-master-mod-version-free-download_GM406889139.pdf
    • http://laboratorium.sman2metro.sch.id/repository/master-coin-free_GM406889139.pdf
    • http://laboratorium.sman2metro.sch.id//repository/coin-master-free-coins-and-spins-online-tool_GM406889139.pdf
    • http://laboratorium.sman2metro.sch.id//repository/free-daily-spins-coin-master-2021_GM406889139.pdf
    • http://laboratorium.sman2metro.sch.id/repository/coin-master-hack-spin-generator-tool_GM406889139.pdf
    • http://laboratorium.sman2metro.sch.id/repository/minecraft-app-free-download_GM479516143.pdf
    • http://laboratorium.sman2metro.sch.id//repository/free-robux-not-a-scam_GM431946152.pdf
    • http://laboratorium.sman2metro.sch.id/repository/roblox-dragon-ball-rage-hack-mobile_GM431946152.pdf
    • http://laboratorium.sman2metro.sch.id/repository/cant-go-to-a-room-in-free-draw-roblox_GM431946152.pdf
    • http://laboratorium.sman2metro.sch.id/repository/coin-master-hack-spins-and-coins-unlimited-free-download_GM406889139.pdf
    • http://laboratorium.sman2metro.sch.id//repository/how-to-hack-to-get-robux_GM431946152.pdf
    • http://laboratorium.sman2metro.sch.id//repository/how-to-create-a-minecraft-server-for-free_GM479516143.pdf
    • http://laboratorium.sman2metro.sch.id/repository/how-to-get-free-robux-on-ipad-2021_GM431946152.pdf
    • http://laboratorium.sman2metro.sch.id//repository/robux-best_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000031ad.bin
8f3308c8f758e929c69f1812ef0d6f6b730409ab7e17f35ebc21e691033a501b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x31AD 22676 bytes
font_01_sfnt_off00006485.bin
5a13a4ba7d4aa3ba564163d7fd1f4e40de414e0c8b16d10ac9018e4301010f0d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6485 18656 bytes

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