Malicious PDF — malware analysis report

Static analysis result for SHA-256 0ecabd67620b7cca…

MALICIOUS

PDF

45.1 KB Created: 2021-05-16 21:46:17 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 3e01bda9dd3d4d5333a6883c7218a1c6 SHA-1: 521e62652aebae0604f7ca0d66d507034b0000ab SHA-256: 0ecabd67620b7ccaa6f0f02ab473b95adb35e97b1f3e5cc7ff05414f2db20a52
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a fake CAPTCHA lure, a common social engineering tactic to trick users into interacting with malicious content. It also embeds external URIs pointing to domains associated with free game currency or hacks, suggesting a phishing or malware distribution attempt. No scripts were extracted, but the presence of embedded URLs and the fake CAPTCHA heuristic strongly indicate a malicious intent to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9621

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.xyz/app/431946152/free-robux-for-free-game-hack PDF link annotation
    • https://www.les-sp.org/images/hack-coin-master-game-apk_GM406889139.pdfIn PDF document text
    • https://www.les-sp.org/images/coin-master-free-spins-and-coins-today-gift-reward_GM406889139.pdfIn PDF document text
    • https://www.les-sp.org/images/free-coins-coin-master-link_GM406889139.pdfIn PDF document text
    • https://www.les-sp.org/images/get-free-robux-no-verification_GM431946152.pdfIn PDF document text
    • https://www.les-sp.org/images/microsoft-rewards-robux_GM431946152.pdfIn PDF document text
    • https://www.les-sp.org/images/roblox-robux-hack-generator_GM431946152.pdfIn PDF document text
    • https://www.les-sp.org/images/free-minecraft-windows-10-with-java_GM479516143.pdfIn PDF document text
    • https://www.les-sp.org/images/abd-roblox_GM431946152.pdfIn PDF document text
    • https://www.les-sp.org/images/free-roblox-accounts-with-robux-that-work-2021_GM431946152.pdfIn PDF document text
    • https://www.les-sp.org/images/coin-master-get-free-spins_GM406889139.pdfIn PDF document text
    • https://www.les-sp.org/images/coin-master-free-spins-and-coins-daily-links_GM406889139.pdfIn PDF document text
    • https://www.les-sp.org/images/robux-download_GM431946152.pdfIn PDF document text
    • https://www.les-sp.org/images/free-robux-no-survey_GM431946152.pdfIn PDF document text
    • https://www.les-sp.org/images/coin-master-free-spin-no-offers_GM406889139.pdfIn PDF document text
    • https://www.les-sp.org/images/how-to-get-free-roebucks-in-roblox_GM431946152.pdfIn PDF document text
    • https://www.les-sp.org/images/coin-master-online-hack_GM406889139.pdfIn PDF document text
    • https://www.les-sp.org/images/robux-websites-that-work_GM431946152.pdfIn PDF document text
    • https://www.les-sp.org/images/coin-master-spin-hack_GM406889139.pdfIn PDF document text
    • https://www.les-sp.org/images/how-to-get-free-robux-without-downloading-any-apps_GM431946152.pdfIn PDF document text
    • https://www.les-sp.org/images/hack-coin-master-spin-android_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off0000472a.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x472A 26080 bytes
SHA-256: f8c7b9706cdd5278b897f2e6885635ca57639b2e1b8fa62560dddd1cea7eaa4a
font_01_sfnt_off0000820e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x820E 3884 bytes
SHA-256: 40b61f8938bd710dc29dc58ba3fde91c245a6a69596ec569b4d27c769ca417cf
font_02_sfnt_off00008eb6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8EB6 18012 bytes
SHA-256: 3ef9e48aa3d97d4217e004f7625a8cbae9320a74231b80a01553f6433e422360

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