Malicious PDF — malware analysis report

Static analysis result for SHA-256 e5ab87b780f3408b…

MALICIOUS

PDF

45.4 KB Created: 2021-06-09 02:30:21 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 90c05eed59887fcec45522fb03fd6d72 SHA-1: dcd99c4d04d8f982e1e324f43553d01b896b75cd SHA-256: e5ab87b780f3408b8906de88451847d4b9ab41cce7069a34f55796cab091c722
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, a common lure to trick users into clicking malicious links. The embedded URL, https://netcdn.tw/app/431946152/sgtwilk-robux-hack-game-hack, likely leads to the download of a second-stage payload. The document body and numerous other extracted URLs reinforce the theme of game hacks and cheats, suggesting a social engineering attempt to lure users into downloading malware.

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/sgtwilk-robux-hack-game-hack PDF link annotation
    • http://www.digilib.uim.ac.id/repository/windows-10-minecraft-hacks_GM479516143.pdfIn PDF document text
    • http://www.digilib.uim.ac.id/repository/robux-hack-free-robux_GM431946152.pdfIn PDF document text
    • http://www.digilib.uim.ac.id/repository/coin-master-free-spins-and-free-coins_GM406889139.pdfIn PDF document text
    • http://www.digilib.uim.ac.id/repository/roblox-free-executor_GM431946152.pdfIn PDF document text
    • http://digilib.uim.ac.id/repository/free-robux-script_GM431946152.pdfIn PDF document text
    • http://digilib.uim.ac.id/repository/free-robux-redeem-codes_GM431946152.pdfIn PDF document text
    • http://www.digilib.uim.ac.id/repository/robux-hack-no-human-verification_GM431946152.pdfIn PDF document text
    • http://digilib.uim.ac.id/repository/roblox-hack-unlimited-robux_GM431946152.pdfIn PDF document text
    • http://digilib.uim.ac.id/repository/how-to-hack-roblox-passwords_GM431946152.pdfIn PDF document text
    • http://www.digilib.uim.ac.id/repository/free-spins-coin-master-hack-2021_GM406889139.pdfIn PDF document text
    • http://digilib.uim.ac.id/repository/how-to-hack-coin-master-facebook_GM406889139.pdfIn PDF document text
    • http://www.digilib.uim.ac.id/repository/coin-master-rewards-app_GM406889139.pdfIn PDF document text
    • http://digilib.uim.ac.id/repository/coin-master-apk-hack-download_GM406889139.pdfIn PDF document text
    • http://www.digilib.uim.ac.id/repository/free-spin-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://www.digilib.uim.ac.id/repository/get-free-roblox_GM431946152.pdfIn PDF document text
    • http://www.digilib.uim.ac.id/repository/minecraft-for-free-on-phone_GM479516143.pdfIn PDF document text
    • http://www.digilib.uim.ac.id/repository/roblox-studio-free-download_GM431946152.pdfIn PDF document text
    • http://digilib.uim.ac.id/repository/coin-master-hack-tool-no-survey_GM406889139.pdfIn PDF document text
    • http://www.digilib.uim.ac.id/repository/coinmaster-gps-user-review-coinmaster-coin-master-hack-pagedemo-index_GM406889139.pdfIn PDF document text
    • http://digilib.uim.ac.id/repository/coin-master-daily-free-spins-link-app_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off000052c1.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x52C1 25276 bytes
SHA-256: 7f59fbabe9601f0fdc8f7b1a21e8b031611e78b7f18de3c7bd5f635738da6a23
font_01_sfnt_off00008cbf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8CBF 18996 bytes
SHA-256: d4e1398706dc924dd275da79996d45fcba62be558369266d56d88cc30fc7660e

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