Malicious PDF — malware analysis report

Static analysis result for SHA-256 3a4385ebe31ea79e…

MALICIOUS

PDF

46.8 KB Created: 2021-06-04 00:28:32 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 32a5e1ff14c6526f6b27a887053e3e0d SHA-1: db5cde3d687f11dc3a94b4ba0b756b4046447134 SHA-256: 3a4385ebe31ea79e557d9dfb2dec3437d8b25f2a4feb943cbb763e6f177c13a7
82 Risk Score

Malware Insights

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

The document presents itself as a lure for 'free Robux' and employs a fake CAPTCHA to trick the user into clicking a malicious link. The embedded URL, https://netcdn.online/app/431946152/roblox-free-robux-no-human-verification-game-hack, is the primary indicator of malicious intent. No scripts were extracted from this sample, limiting the analysis of its execution flow.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9832

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 https://netcdn.online/app/431946152/roblox-free-robux-no-human-verification-game-hack
    • http://lib.untad.ac.id/repository/how-to-get-free-unlimited-coins-in-coin-master_GM406889139.pdf
    • http://lib.untad.ac.id/repository/how-to-hack-m-coins-mcpe-master_GM406889139.pdf
    • http://lib.untad.ac.id/repository/free-minecraft-worlds_GM479516143.pdf
    • http://lib.untad.ac.id/repository/coin-master-free-spin-game_GM406889139.pdf
    • http://lib.untad.ac.id//repository/how-to-get-free-robux-hack-2021_GM431946152.pdf
    • http://lib.untad.ac.id/repository/free-daily-coin-master-coins_GM406889139.pdf
    • http://lib.untad.ac.id/repository/robuxmatchcom-free-robux_GM431946152.pdf
    • http://lib.untad.ac.id/repository/coin-master-hack-without-verification-2021_GM406889139.pdf
    • http://lib.untad.ac.id//repository/coin-master-ios-hack_GM406889139.pdf
    • http://lib.untad.ac.id/repository/pokemon-go-free-643_GM1094591345.pdf
    • http://lib.untad.ac.id/repository/extra-free-spins-for-coin-master_GM406889139.pdf
    • http://lib.untad.ac.id//repository/how-to-change-roblox-name-for-free_GM431946152.pdf
    • http://lib.untad.ac.id//repository/rbx-roblox-robux_GM431946152.pdf
    • http://lib.untad.ac.id/repository/tiktok-free-online-textbooks_GM835599320.pdf
    • http://lib.untad.ac.id/repository/free-robux-giveaway_GM431946152.pdf
    • http://lib.untad.ac.id/repository/haktuts-free-spins_GM406889139.pdf
    • http://lib.untad.ac.id/repository/coin-master-70-spin-link-today_GM406889139.pdf
    • http://lib.untad.ac.id//repository/free-coin-master-spins_GM406889139.pdf
    • http://lib.untad.ac.id//repository/mosttechs-coin-master-free-spins_GM406889139.pdf
    • http://lib.untad.ac.id/repository/minecraft-pe-free-download-ios_GM479516143.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00005483.bin
f7d00cd90f4665b8f0b05bd6c586bdd706ed1de90ce1d8f8d3ca65d2e5291f7e		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5483 27020 bytes
font_01_sfnt_off0000928d.bin
9d302b82f438100f3cf39adb1b208b926e457e77310e02e89ba7e0c774768e38		 pdf-font-stream PDF embedded font (sfnt) at offset 0x928D 18932 bytes

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