Malicious PDF — malware analysis report

Static analysis result for SHA-256 6ccd525bb8cf0001…

MALICIOUS

PDF

34.0 KB Created: 2021-07-03 11:40:31 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: f6b3e9070887f07715e5cb66ccefb4fb SHA-1: aaddbabf8a7f3585d5880016098589cb240039db SHA-256: 6ccd525bb8cf00019c8959a483ad3d75635039b61e91628a796e39fb53e5d616
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous embedded links, many of which are related to game hacks and cheats for popular games like Coin Master and Roblox. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of external links, suggesting a link farm designed to drive traffic. The ML classifier also strongly flagged this PDF as malicious. The presence of a download button lure 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/406889139/coin-master-bonus-game-hack
    • https://mialfalahkanigoroblitar.sch.id/__statics/gudangsoal/files/how-to-make-a-private-server-on-roblox-for-free_GM431946152.pdf
    • https://mialfalahkanigoroblitar.sch.id/__statics/gudangsoal/files/free-minecraft-videos_GM479516143.pdf
    • https://mialfalahkanigoroblitar.sch.id/__statics/gudangsoal/files/coin-master-viking-quest-hack_GM406889139.pdf
    • https://mialfalahkanigoroblitar.sch.id/__statics/gudangsoal/files/roblox-hack-scripts-pastebin_GM431946152.pdf
    • https://mialfalahkanigoroblitar.sch.id/__statics/gudangsoal/files/hack-coin-master-32-mod-apk_GM406889139.pdf
    • https://mialfalahkanigoroblitar.sch.id/__statics/gudangsoal/files/to-get-free-robux-on-roblox_GM431946152.pdf
    • https://mialfalahkanigoroblitar.sch.id/__statics/gudangsoal/files/free-robux-generator-no-verification-2021_GM431946152.pdf
    • https://mialfalahkanigoroblitar.sch.id/__statics/gudangsoal/files/how-tf-do-i-get-free-robux_GM431946152.pdf
    • https://mialfalahkanigoroblitar.sch.id/__statics/gudangsoal/files/minecraft-pe-free-download-ios-no-jailbreak_GM479516143.pdf
    • https://mialfalahkanigoroblitar.sch.id/__statics/gudangsoal/files/roblox-jailbreak-how-to-get-bugatti-for-free_GM431946152.pdf
    • https://mialfalahkanigoroblitar.sch.id/__statics/gudangsoal/files/roblox-download-pc-free_GM431946152.pdf
    • https://mialfalahkanigoroblitar.sch.id/__statics/gudangsoal/files/roblox-group-free-robux_GM431946152.pdf
    • https://mialfalahkanigoroblitar.sch.id/__statics/gudangsoal/files/free-robux-real-working_GM431946152.pdf
    • https://mialfalahkanigoroblitar.sch.id/__statics/gudangsoal/files/coin-master-daily-gifts_GM406889139.pdf
    • https://mialfalahkanigoroblitar.sch.id/__statics/gudangsoal/files/free-robux-no-verification_GM431946152.pdf
    • https://mialfalahkanigoroblitar.sch.id/__statics/gudangsoal/files/roblox-army-free-robux_GM431946152.pdf
    • https://mialfalahkanigoroblitar.sch.id/__statics/gudangsoal/files/get-free-spins-coin-master-link_GM406889139.pdf
    • https://mialfalahkanigoroblitar.sch.id/__statics/gudangsoal/files/facebook-coin-master-free-spins_GM406889139.pdf
    • https://mialfalahkanigoroblitar.sch.id/__statics/gudangsoal/files/coin-master-free-link-app_GM406889139.pdf
    • https://mialfalahkanigoroblitar.sch.id/__statics/gudangsoal/files/hack-para-coin-master-singapore_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002fe8.bin
8294a15a2738139329fc9ffba66e43faada3d5d314b369d965eb50963efb3773		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2FE8 22568 bytes
font_01_sfnt_off0000626f.bin
347f92f2c72f5474204f432aaed390864ecedce221811ee40a58a8bd6de89a14		 pdf-font-stream PDF embedded font (sfnt) at offset 0x626F 18192 bytes

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