Malicious PDF — malware analysis report

Static analysis result for SHA-256 140dfd17416194c3…

MALICIOUS

PDF

44.8 KB Created: 2021-06-13 23:51:51 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 0848a4b55c0dfada899d71b5b3218bf5 SHA-1: 30d2b45867db566085c25c4acfa8162ba7dbe166 SHA-256: 140dfd17416194c3fab303a9ea2cd247a1f1e842cc527645692832595c71b64e
82 Risk Score

Malware Insights

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

The document presents a fake CAPTCHA and a call-to-action to trick users into clicking a malicious link. The embedded URL, http://netcdn.co/app/431946152/how-to-be-vip-in-roblox-for-free-game-hack, likely leads to a second-stage download or phishing page. The document's content and heuristics strongly suggest a social engineering lure for obtaining in-game items or currency.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9632

Heuristics 4

  • Fake CAPTCHA / human verification prompt high SE_FAKE_CAPTCHA
    Document displays a fake CAPTCHA or human-verification prompt — used to trick users into running commands or pressing keyboard shortcuts
  • 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.co/app/431946152/how-to-be-vip-in-roblox-for-free-game-hack
    • https://www.croatia-flyfishing.com/files/free-roblox-accounts-with-robux-that-work-2021_GM431946152.pdf
    • http://croatia-flyfishing.com/files/coin-master-hack-2021_GM406889139.pdf
    • https://www.croatia-flyfishing.com/files/free-robux-kid-friendly_GM431946152.pdf
    • http://croatia-flyfishing.com/files/coin-master-free-spin-link-today-download_GM406889139.pdf
    • http://croatia-flyfishing.com/files/free-robux-no-verification-2021-android_GM431946152.pdf
    • https://www.croatia-flyfishing.com/files/mcpe-free-download_GM479516143.pdf
    • http://croatia-flyfishing.com/files/get-free-food-in-coin-master_GM406889139.pdf
    • https://www.croatia-flyfishing.com/files/minecraft-on-computer-free_GM479516143.pdf
    • http://croatia-flyfishing.com/files/free-robux-without-human-verification_GM431946152.pdf
    • https://www.croatia-flyfishing.com/files/roblox-free-robux-no-verification_GM431946152.pdf
    • https://www.croatia-flyfishing.com/files/rblx-city-free-robux_GM431946152.pdf
    • https://www.croatia-flyfishing.com/files/coin-master-free-spins-link-today-new_GM406889139.pdf
    • https://www.croatia-flyfishing.com/files/free-star-codes-2021-roblox_GM431946152.pdf
    • https://www.croatia-flyfishing.com/files/coin-master-free-coins-and-spins-daily_GM406889139.pdf
    • http://croatia-flyfishing.com/files/coin-master-hack-spins-android_GM406889139.pdf
    • http://croatia-flyfishing.com/files/chisel-and-bits-mod-minecraft-pe_GM479516143.pdf
    • http://croatia-flyfishing.com/files/free-robux-sites-that-work_GM431946152.pdf
    • https://www.croatia-flyfishing.com/files/free-card-collection-in-coin-master_GM406889139.pdf
    • http://croatia-flyfishing.com/files/coin-master-hack-spins_GM406889139.pdf
    • http://croatia-flyfishing.com/files/free-roblox-printables_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off000049c2.bin
a72337214f8fa5bd90a3cc5eca5fd00513592a4e58e8539b8bc45da0ff5cc37d
decompressed-pdf-stream PDF FlateDecoded stream at offset 0x49C2 24716 bytes
font_01_sfnt_off000081c8.bin
baad2f3f6808f4af03fa9398e38c580c8d846f7f773a947d8cc1f39b2753d31a
pdf-font-stream PDF embedded font (sfnt) at offset 0x81C8 2844 bytes
font_02_sfnt_off00008b8a.bin
4b6932834ee9501d7596c74b09adcaa8a6df692146268c5adfa94b9410cd2174
pdf-font-stream PDF embedded font (sfnt) at offset 0x8B8A 18540 bytes