Malicious PDF — malware analysis report

Static analysis result for SHA-256 a1e85e5825d97a14…

MALICIOUS

PDF

45.3 KB Created: 2021-06-09 06:48:43 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 7a52413b851914561ebacb68790ef13f SHA-1: 80723efbbd59d1323247ce057c8ee4e721c04b56 SHA-256: a1e85e5825d97a142b54a326af76ac0e50d18e758263a3bf9bfc1a0659dfba49
82 Risk Score

Malware Insights

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

The document presents a fake CAPTCHA or human verification prompt to trick the user into clicking a malicious link. The embedded URL and document body content suggest a lure for free game currency or items, such as Robux or Coin Master spins. The primary malicious action is directing the user to a potentially harmful external resource.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9864

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.tw/app/431946152/how-2-get-free-robux-on-roblox-game-hack PDF link annotation
    • https://delsys.com.tw/image/data/files/coin-master-free-spins-2021-hack_GM406889139.pdfIn PDF document text
    • https://delsys.com.tw/image/data/files/coin-master-daily-free-spin-app_GM406889139.pdfIn PDF document text
    • https://delsys.com.tw/image/data/files/claim-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://delsys.com.tw/image/data/files/coin-master-coin-hack_GM406889139.pdfIn PDF document text
    • https://delsys.com.tw/image/data/files/minecraft-free-download-chromebook_GM479516143.pdfIn PDF document text
    • https://delsys.com.tw/image/data/files/new-free-money-links-coin-master_GM406889139.pdfIn PDF document text
    • https://delsys.com.tw/image/data/files/coin-master-free-spin-today_GM406889139.pdfIn PDF document text
    • https://delsys.com.tw/image/data/files/spin-and-coin-link_GM406889139.pdfIn PDF document text
    • https://delsys.com.tw/image/data/files/actual-free-robux_GM431946152.pdfIn PDF document text
    • https://delsys.com.tw/image/data/files/earn-free-robux_GM431946152.pdfIn PDF document text
    • https://delsys.com.tw/image/data/files/free-coins-and-spins-2021_GM406889139.pdfIn PDF document text
    • https://delsys.com.tw/image/data/files/paginas-roblox-free-robuxx_GM431946152.pdfIn PDF document text
    • https://delsys.com.tw/image/data/files/coin-master-hack-app-for-ios_GM406889139.pdfIn PDF document text
    • https://delsys.com.tw/image/data/files/coin-master-2021-free-spins-link-2021_GM406889139.pdfIn PDF document text
    • https://delsys.com.tw/image/data/files/coin-master-free-coins-and-spins_GM406889139.pdfIn PDF document text
    • https://delsys.com.tw/image/data/files/universal-minecraft-converter-free_GM479516143.pdfIn PDF document text
    • https://delsys.com.tw/image/data/files/get-free-robux-march-2021_GM431946152.pdfIn PDF document text
    • https://delsys.com.tw/image/data/files/coinmaster_GM406889139.pdfIn PDF document text
    • https://delsys.com.tw/image/data/files/offers-to-get-free-spins-in-coin-master_GM406889139.pdfIn PDF document text
    • https://delsys.com.tw/image/data/files/how-to-get-more-spins-on-coin-master-for-free_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004f6e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4F6E 26628 bytes
SHA-256: f862db59fcfcc5c83d012fe73cb28274d3e6220d1c791f1ec1ea64eb95ff3c2d
font_01_sfnt_off00008dbc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8DBC 18480 bytes
SHA-256: 12fe79082e64793153cab0bd6d657aa557f2fc0f6185b8b93002b06514a58ef9

Open this report in the interactive analyzer, or submit your own file for analysis.