Malicious PDF — malware analysis report

Static analysis result for SHA-256 c63005c12ea9b67e…

MALICIOUS

PDF

33.9 KB Created: 2021-07-06 02:22:11 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: d478f13371d74739ad7380995283f4b0 SHA-1: 1c0c2cab9d3d74db7c2974420e3341cf4f07b999 SHA-256: c63005c12ea9b67e237525fdb2869e2933fe3e9cc8d8a17d41a2d6ebc320db9c
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a launch action that directs the user to a URL, likely to download a second-stage payload. The document body and embedded URLs suggest a lure related to game cheats and free currency, a common tactic for distributing malware. The ML classifier strongly indicates malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 4

  • Launch action high PDF_LAUNCH
    PDF contains a /Launch action with an unresolved or extension-less target — treat as potentially dangerous
  • 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/free-spins-coin-master-links-game-hack
    • http://library.acehresearch.org/repository/free-minecraft-server-hosting_GM479516143.pdf
    • http://library.acehresearch.org/repository/coin-master-hack-tuts_GM406889139.pdf
    • http://library.acehresearch.org/repository/who-to-get-free-robux_GM431946152.pdf
    • http://library.acehresearch.org/repository/free-robux-pastebin-no-wait-or-suscribe_GM431946152.pdf
    • http://library.acehresearch.org/repository/free-robux-codes-xbox-one_GM431946152.pdf
    • http://library.acehresearch.org/repository/robloxcom-hack-free-robux_GM431946152.pdf
    • http://library.acehresearch.org/repository/how-to-get-tix-on-roblox-with-cheat-engine_GM431946152.pdf
    • http://library.acehresearch.org/repository/did-roblox-get-hacked-in-2021_GM431946152.pdf
    • http://library.acehresearch.org/repository/free-robux-gernerator_GM431946152.pdf
    • http://library.acehresearch.org/repository/free-robux-codes-2021-september_GM431946152.pdf
    • http://library.acehresearch.org/repository/free-unused-roblox-gift-card-codes-2021_GM431946152.pdf
    • http://library.acehresearch.org/repository/orewards-com-free-robux_GM431946152.pdf
    • http://library.acehresearch.org/repository/launch-roblox-hacks_GM431946152.pdf
    • http://library.acehresearch.org/repository/free-999billion-robux_GM431946152.pdf
    • http://library.acehresearch.org/repository/seraph-roblox-free_GM431946152.pdf
    • http://library.acehresearch.org/repository/coin-master-hack-apk-android_GM406889139.pdf
    • http://library.acehresearch.org/repository/is-there-a-working-roblox-robux-hack_GM431946152.pdf
    • http://library.acehresearch.org/repository/roblox-free-unblocked-download_GM431946152.pdf
    • http://library.acehresearch.org/repository/hacks-for-roblox-jailbreak_GM431946152.pdf
    • http://library.acehresearch.org/repository/instantrobux_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_002_off00002ee4.bin
c6377df1996311c6fc3b7f0deeb3b1a9ee4f4f3b86b0553ddf15b30d5863a654		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x2EE4 22592 bytes
font_01_sfnt_off0000617e.bin
bbd45a100c9fda56c98402c01c945e99ba5b23a8a144929349c4b2a582275d64		 pdf-font-stream PDF embedded font (sfnt) at offset 0x617E 18344 bytes

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