Malicious PDF — malware analysis report

Static analysis result for SHA-256 3adb695c7f4145b5…

MALICIOUS

PDF

47.9 KB Created: 2021-06-03 12:25:15 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 2113c796ca307ac33f2a913a3d2a1497 SHA-1: 1e5a7fca895842920ea00f99a67ce70cfa85338d SHA-256: 3adb695c7f4145b5c48fe4f1187ff45f6217f4a3f8e137acfe3fe664ea0721d9
82 Risk Score

Malware Insights

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

The PDF document contains a fake CAPTCHA lure, designed to trick users into interacting with a malicious link. The embedded URL, https://netcdn.online/app/431946152/how-can-u-get-free-robux-game-hack, likely leads to the download of a second-stage payload. The document body and numerous other URLs suggest a theme of free game currency or cheats, a common lure for phishing and malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9796

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/how-can-u-get-free-robux-game-hack
    • http://opac.akafarma-aceh.ac.id/repository/roblox-inappropriate_GM431946152.pdf
    • http://opac.akafarma-aceh.ac.id/repository/village-4-coin-master_GM406889139.pdf
    • http://opac.akafarma-aceh.ac.id/repository/free-coins-coin-master-haktuts_GM406889139.pdf
    • http://opac.akafarma-aceh.ac.id/repository/how-to-get-stuff-that-cost-coins-free-mpe-master_GM406889139.pdf
    • http://opac.akafarma-aceh.ac.id/repository/roblox-pink-free-robux_GM431946152.pdf
    • http://opac.akafarma-aceh.ac.id/repository/free-robux-mod_GM431946152.pdf
    • http://opac.akafarma-aceh.ac.id/repository/free-coin-master-spins_GM406889139.pdf
    • http://opac.akafarma-aceh.ac.id/repository/free-robux-no-human-verification-2021_GM431946152.pdf
    • http://opac.akafarma-aceh.ac.id/repository/roblox-cheat-robux_GM431946152.pdf
    • http://opac.akafarma-aceh.ac.id/repository/coin-master-free-coins-and-spins-daily-summary_GM406889139.pdf
    • http://opac.akafarma-aceh.ac.id/repository/online-coin-master-free-spin-app_GM406889139.pdf
    • http://opac.akafarma-aceh.ac.id/repository/can-i-get-free-robux_GM431946152.pdf
    • http://opac.akafarma-aceh.ac.id/repository/lots-of-robux_GM431946152.pdf
    • http://opac.akafarma-aceh.ac.id/repository/coin-master-generator-free_GM406889139.pdf
    • http://opac.akafarma-aceh.ac.id/repository/free-spin-card-exchange-coin-master_GM406889139.pdf
    • http://opac.akafarma-aceh.ac.id/repository/coin-master-attack-madness-hack_GM406889139.pdf
    • http://opac.akafarma-aceh.ac.id/repository/coin-master-lucky-patcher-hack_GM406889139.pdf
    • http://opac.akafarma-aceh.ac.id/repository/kuso-icu-roblox-hack_GM431946152.pdf
    • http://opac.akafarma-aceh.ac.id/repository/coin-master-spin-and-coins-free_GM406889139.pdf
    • http://opac.akafarma-aceh.ac.id/repository/roblox-free-clothes-hack_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off000050b1.bin
8c825f0eda84018df2bf4ff021f553572c4ca20107c28280a303216bfe8243b2		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x50B1 25888 bytes
font_01_sfnt_off00008d53.bin
78e89c8f621d90011ffb7a2107d701d4cdf090a2f2cf42d5a65297289afc8805		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8D53 2832 bytes
font_02_sfnt_off00009703.bin
6d387a6157482ae5d4424ea2a1b018d5f079fe6dbc45eeb2149446a5bd008250		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9703 18696 bytes

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