Malicious PDF — malware analysis report

Static analysis result for SHA-256 12c70d535c13ca73…

MALICIOUS

PDF

34.0 KB Created: 2021-07-05 16:57:19 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 39717e8e3e180ce770c04ddb8ca9079a SHA-1: 05d543fb6e000a8c63c02fcdc90b394277826bf4 SHA-256: 12c70d535c13ca73662aac27a5455199a151cbe1cfa1d8334fa0a07a021ec75b
102 Risk Score

Malware Insights

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

The PDF document contains numerous embedded links, many of which are part of a link farm, directing users to sites offering game hacks and cheats. The ML classifier strongly flagged this PDF as malicious, and the presence of external URIs and a visual download button lure suggest an attempt to trick users into downloading further malicious content. No scripts were extracted, but the overall structure and URL patterns are indicative of a downloader or phishing lure.

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-app-game-hack
    • http://hipmibadung.or.id/new/public/ckfinder/userfiles/files/bit-ly-coin-master-hack_GM406889139.pdf
    • http://hipmibadung.or.id/new/public/ckfinder/userfiles/files/if-i-uninstall-minecraft-can-i-reinstall-it-for-free_GM479516143.pdf
    • http://hipmibadung.or.id/new/public/ckfinder/userfiles/files/roblox-cheat-engine-63_GM431946152.pdf
    • http://hipmibadung.or.id/new/public/ckfinder/userfiles/files/coin-master-free-spins-and-coins-link-haktuts_GM406889139.pdf
    • http://hipmibadung.or.id/new/public/ckfinder/userfiles/files/roblox-the-dump-work-at-a-pizza-place-money-hacks_GM431946152.pdf
    • http://hipmibadung.or.id/new/public/ckfinder/userfiles/files/how-to-get-free-robux-2021_GM431946152.pdf
    • http://hipmibadung.or.id/new/public/ckfinder/userfiles/files/coin-master-free-blogspot_GM406889139.pdf
    • http://hipmibadung.or.id/new/public/ckfinder/userfiles/files/coin-master-hack-pc-free_GM406889139.pdf
    • http://hipmibadung.or.id/new/public/ckfinder/userfiles/files/free-spins-and-coins-coin-master-app_GM406889139.pdf
    • http://hipmibadung.or.id/new/public/ckfinder/userfiles/files/how-to-get-free-robux-in-a-easy-way_GM431946152.pdf
    • http://hipmibadung.or.id/new/public/ckfinder/userfiles/files/make-free-robux_GM431946152.pdf
    • http://hipmibadung.or.id/new/public/ckfinder/userfiles/files/coin-master-free-daily-spins-link_GM406889139.pdf
    • http://hipmibadung.or.id/new/public/ckfinder/userfiles/files/roblox-free-play-no-download_GM431946152.pdf
    • http://hipmibadung.or.id/new/public/ckfinder/userfiles/files/admin-panel-free-robux_GM431946152.pdf
    • http://hipmibadung.or.id/new/public/ckfinder/userfiles/files/roblox-group-clothing-hack_GM431946152.pdf
    • http://hipmibadung.or.id/new/public/ckfinder/userfiles/files/robux-hack-tools_GM431946152.pdf
    • http://hipmibadung.or.id/new/public/ckfinder/userfiles/files/roblox-sharkbite-free-boats-script_GM431946152.pdf
    • http://hipmibadung.or.id/new/public/ckfinder/userfiles/files/free-lambo-roblox-jailbreak_GM431946152.pdf
    • http://hipmibadung.or.id/new/public/ckfinder/userfiles/files/free-minecraft-coins_GM479516143.pdf
    • http://hipmibadung.or.id/new/public/ckfinder/userfiles/files/how-to-hack-someone-on-roblox_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_002_off0000311b.bin
7224e51712803f77de67cc6a445095e3ff6d50c01dbf1ad35c32f0824cdd0694		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x311B 22420 bytes
font_01_sfnt_off000062f8.bin
400bd01aeeee29512dc5c2a015b8ac58bc02acb7abc216a5ca07a898c149c10b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x62F8 18008 bytes

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