Malicious PDF — malware analysis report

Static analysis result for SHA-256 0e7f2d1f2955ef22…

MALICIOUS

PDF

35.2 KB Created: 2021-07-04 20:11:20 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: ba1644e111199f40b1e2b5fac6c7f1e5 SHA-1: 9f7d8cfb4c2647f5d261977f82e8c4a1480197fe SHA-256: 0e7f2d1f2955ef22af2ffd67c06173a73ea716cab6a2e43c580f4bea6aa9b163
102 Risk Score

Malware Insights

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

The PDF document contains numerous embedded links, presented as a link farm, that direct users to websites promising free in-game currency and cheats for popular games. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of external links, and the 'SE_DOWNLOAD_BUTTON' suggests a lure to click these links. The primary IOC is the URL http://netcdn.tw/app/431946152/how-to-get-free-robux-by-playing-games-game-hack, which is directly referenced in the document body.

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/how-to-get-free-robux-by-playing-games-game-hack
    • https://ekbm.mankotapasuruan.sch.id/__statics/gudangsoal/files/coin-master-cheats-2021_GM406889139.pdf
    • https://ekbm.mankotapasuruan.sch.id/__statics/gudangsoal/files/how-do-we-get-free-robux_GM431946152.pdf
    • https://ekbm.mankotapasuruan.sch.id/__statics/gudangsoal/files/how-to-get-free-roblox-money_GM431946152.pdf
    • https://ekbm.mankotapasuruan.sch.id/__statics/gudangsoal/files/how-to-get-minecraft-dungeons-for-free_GM479516143.pdf
    • https://ekbm.mankotapasuruan.sch.id/__statics/gudangsoal/files/free-rare-cards-for-coin-master-christmas_GM406889139.pdf
    • https://ekbm.mankotapasuruan.sch.id/__statics/gudangsoal/files/free-spins-coin-master-links_GM406889139.pdf
    • https://ekbm.mankotapasuruan.sch.id/__statics/gudangsoal/files/robloxcom-how-to-get-free-robux-only-today-adverts_GM431946152.pdf
    • https://ekbm.mankotapasuruan.sch.id/__statics/gudangsoal/files/daily-free-spins-for-coin-master_GM406889139.pdf
    • https://ekbm.mankotapasuruan.sch.id/__statics/gudangsoal/files/free-roblox-clothes-girl_GM431946152.pdf
    • https://ekbm.mankotapasuruan.sch.id/__statics/gudangsoal/files/hack-to-get-free-spins-on-coin-master_GM406889139.pdf
    • https://ekbm.mankotapasuruan.sch.id/__statics/gudangsoal/files/how-to-make-a-minecraft-client_GM479516143.pdf
    • https://ekbm.mankotapasuruan.sch.id/__statics/gudangsoal/files/minecraft-app-store-free_GM479516143.pdf
    • https://ekbm.mankotapasuruan.sch.id/__statics/gudangsoal/files/appbountynet-free-robux_GM431946152.pdf
    • https://ekbm.mankotapasuruan.sch.id/__statics/gudangsoal/files/voodygamescom-roblox-hack_GM431946152.pdf
    • https://ekbm.mankotapasuruan.sch.id/__statics/gudangsoal/files/minecraft-pe-hack-client_GM479516143.pdf
    • https://ekbm.mankotapasuruan.sch.id/__statics/gudangsoal/files/coin-master-free-spin-best-link_GM406889139.pdf
    • https://ekbm.mankotapasuruan.sch.id/__statics/gudangsoal/files/free-robux-real-working_GM431946152.pdf
    • https://ekbm.mankotapasuruan.sch.id/__statics/gudangsoal/files/coin-master-hack-apk-download-2021_GM406889139.pdf
    • https://ekbm.mankotapasuruan.sch.id/__statics/gudangsoal/files/roblox-tokyo-ghoul-project-killzone-hack_GM431946152.pdf
    • https://ekbm.mankotapasuruan.sch.id/__statics/gudangsoal/files/roblox-apk-hack_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000030be.bin
658df5f107f6fdfe72fa294d5c3f73c702747683d25e68783e7fa8ee2b069368		 pdf-font-stream PDF embedded font (sfnt) at offset 0x30BE 22560 bytes
font_01_sfnt_off000062ae.bin
9e977a5575cc9b35e2b14531736cd30bfd9bd13fa3776d4baf53e95f9fc8fb94		 pdf-font-stream PDF embedded font (sfnt) at offset 0x62AE 19772 bytes

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