Malicious PDF — malware analysis report

Static analysis result for SHA-256 82cddfd5c91fc45c…

MALICIOUS

PDF

42.9 KB Created: 2021-05-17 15:38:58 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 44a4be4606be2a5038a764bbfacd53de SHA-1: acb72ebfd6f2f735c3eeeff5e6579f7b0039a0ee SHA-256: 82cddfd5c91fc45cac1a9c8e5386d5cb6a84d99902e8b7766f58b85f69390e47
62 Risk Score

Malware Insights

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

The PDF document contains a lure for "Free Robux Giveaway Live" and includes a malicious URL that redirects to a site offering game hacks. The ML classifier strongly flagged this PDF as malicious, and the presence of external URIs and callback lures suggests a phishing or malware distribution attempt. While no scripts were explicitly extracted, the PDF structure and embedded links indicate an attempt to exploit user interest in free in-game currency to redirect them to a potentially harmful site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

Heuristics 4

  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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-giveaway-live-game-hack
    • https://elearning.mtsn-saber.com/__statics/gudangsoal/files/how-to-hack-roblox-accounts-on-phone_GM431946152.pdf
    • https://elearning.mtsn-saber.com/__statics/gudangsoal/files/how-to-get-free-robux-on-mobile_GM431946152.pdf
    • https://elearning.mtsn-saber.com/__statics/gudangsoal/files/free-robux-apps-that-work_GM431946152.pdf
    • https://elearning.mtsn-saber.com/__statics/gudangsoal/files/easy-robux-today_GM431946152.pdf
    • https://elearning.mtsn-saber.com/__statics/gudangsoal/files/free-minecraft-alt-generator_GM479516143.pdf
    • https://elearning.mtsn-saber.com/__statics/gudangsoal/files/coin-master-homepage_GM406889139.pdf
    • https://elearning.mtsn-saber.com/__statics/gudangsoal/files/coin-master-hack-apk-with-fb-login-2021_GM406889139.pdf
    • https://elearning.mtsn-saber.com/__statics/gudangsoal/files/free-robux-no-human-verification-or-survey-2021_GM431946152.pdf
    • https://elearning.mtsn-saber.com/__statics/gudangsoal/files/coin-master-hack-extension_GM406889139.pdf
    • https://elearning.mtsn-saber.com/__statics/gudangsoal/files/how-to-get-free-minecoins-in-minecraft_GM479516143.pdf
    • https://elearning.mtsn-saber.com/__statics/gudangsoal/files/how-do-you-get-free-robux-2021_GM431946152.pdf
    • https://elearning.mtsn-saber.com/__statics/gudangsoal/files/master-coin-hack-mod_GM406889139.pdf
    • https://elearning.mtsn-saber.com/__statics/gudangsoal/files/minecraft-pe-free-download-android_GM479516143.pdf
    • https://elearning.mtsn-saber.com/__statics/gudangsoal/files/hack-coin-master-for-free_GM406889139.pdf
    • https://elearning.mtsn-saber.com/__statics/gudangsoal/files/https-rbx-place-rewards_GM431946152.pdf
    • https://elearning.mtsn-saber.com/__statics/gudangsoal/files/free-spins-coin-master-2021_GM406889139.pdf
    • https://elearning.mtsn-saber.com/__statics/gudangsoal/files/hack-coin-master-apk_GM406889139.pdf
    • https://elearning.mtsn-saber.com/__statics/gudangsoal/files/can-i-get-robux-for-free_GM431946152.pdf
    • https://elearning.mtsn-saber.com/__statics/gudangsoal/files/best-free-coin-master-spins_GM406889139.pdf
    • https://elearning.mtsn-saber.com/__statics/gudangsoal/files/how-to-get-800-robux-for-free_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000493e.bin
670f5c2a728715e71d4d8c77c7a6dfd81170e95c57b5a7b5d1237012be1b636e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x493E 25660 bytes
font_01_sfnt_off000083b2.bin
3db94d24ba3abe2bdb9d310b65f8480e65e9005ffe127367b6d2ef8ae08c9d7b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x83B2 18820 bytes

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