Malicious PDF — malware analysis report

Static analysis result for SHA-256 cc91819eeec46dae…

MALICIOUS

PDF

34.5 KB Created: 2021-06-30 06:34:27 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 7ab915b426cb3de2c65192c29f2e2233 SHA-1: 5c20b5b33d20dc0208b7e622c2e4ed03eab3cefe SHA-256: cc91819eeec46dae2a5b154d22b98722f92abb596ac282a511ac2accba34308c
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The document displays a fake CAPTCHA to lure the user into clicking a download link or executing a command, a common social engineering tactic. The presence of multiple URLs related to game hacks and cheats suggests a phishing or malware distribution attempt. While no scripts were explicitly extracted, the ML classifier's high confidence and the nature of the fake CAPTCHA heuristic indicate a malicious intent, likely to download a second-stage payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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/what-can-you-do-with-cheat-engine-on-roblox-game-hack PDF link annotation
    • http://poltekkesbanten.ac.id/e-lib/repository/how-to-get-800-robux-for-free_GM431946152.pdfIn PDF document text
    • http://poltekkesbanten.ac.id/e-lib/repository/free-minecraft-capes_GM479516143.pdfIn PDF document text
    • http://poltekkesbanten.ac.id/e-lib/repository/minecraft-bedrock-hacks-windows-10_GM479516143.pdfIn PDF document text
    • http://poltekkesbanten.ac.id/e-lib/repository/roblox-free-bundles_GM431946152.pdfIn PDF document text
    • http://poltekkesbanten.ac.id/e-lib/repository/coin-master-hack-2021-download_GM406889139.pdfIn PDF document text
    • http://poltekkesbanten.ac.id/e-lib/repository/how-to-hack-all-the-cargo-crates-in-roblox_GM431946152.pdfIn PDF document text
    • http://poltekkesbanten.ac.id/e-lib/repository/spin-coin-master-free_GM406889139.pdfIn PDF document text
    • http://poltekkesbanten.ac.id/e-lib/repository/how-to-make-items-free-in-roblox_GM431946152.pdfIn PDF document text
    • http://poltekkesbanten.ac.id/e-lib/repository/coin-master-free-spin-link-today-2021_GM406889139.pdfIn PDF document text
    • http://poltekkesbanten.ac.id/e-lib/repository/app-store-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://poltekkesbanten.ac.id/e-lib/repository/how-to-get-free-robux-easy-on-phone_GM431946152.pdfIn PDF document text
    • http://poltekkesbanten.ac.id/e-lib/repository/coin-master-hack-no-survey_GM406889139.pdfIn PDF document text
    • http://poltekkesbanten.ac.id/e-lib/repository/free-robux-com_GM431946152.pdfIn PDF document text
    • http://poltekkesbanten.ac.id/e-lib/repository/hack-minecraft_GM479516143.pdfIn PDF document text
    • http://poltekkesbanten.ac.id/e-lib/repository/what-is-wurst_GM479516143.pdfIn PDF document text
    • http://poltekkesbanten.ac.id/e-lib/repository/how-to-get-free-roblox-gift-cards_GM431946152.pdfIn PDF document text
    • http://poltekkesbanten.ac.id/e-lib/repository/best-free-minecraft-servers_GM479516143.pdfIn PDF document text
    • http://poltekkesbanten.ac.id/e-lib/repository/free-robux-copy-pasta_GM431946152.pdfIn PDF document text
    • http://poltekkesbanten.ac.id/e-lib/repository/como-hackear-coin-master-gratis_GM406889139.pdfIn PDF document text
    • http://poltekkesbanten.ac.id/e-lib/repository/free-robux-real_GM431946152.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_off00002fd1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2FD1 21904 bytes
SHA-256: 2029d4772f6a1cd646f6fab7d480bc6e1d8bb31c94791d499c5538605d90b3aa
font_01_sfnt_off00006044.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6044 19544 bytes
SHA-256: 8a718c7785acbf7e79cccb420a169817ee9b84e525d46b8606f70249736bdefe

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