Malicious PDF — malware analysis report

Static analysis result for SHA-256 5c9d6cad1b4de57d…

MALICIOUS

PDF

46.1 KB Created: 2021-05-10 20:01:28 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: c6875b5b3cdabdaedff3252a71b1ce48 SHA-1: 2652ef9414e72083ef073e7e6f6f2f4fad9b36f5 SHA-256: 5c9d6cad1b4de57d706c7eff628d578b11a78baa89883bc521e8e4838eec743a
82 Risk Score

Malware Insights

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

The PDF document contains a fake CAPTCHA lure, designed to trick users into interacting with a malicious link. The embedded URI points to a URL that likely hosts a payload, indicated by the ML classifier's high confidence score. The document's content and structure strongly suggest a social engineering attempt to facilitate the download of further malicious content.

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 https://netcdn.xyz/app/431946152/free-robux-no-generator-game-hack
    • https://daring.mtsn7sumedang.sch.id/__statics/gudangsoal/files/free-robux-codes-not-used_GM431946152.pdf
    • https://daring.mtsn7sumedang.sch.id/__statics/gudangsoal/files/roblox-hack-site_GM431946152.pdf
    • https://daring.mtsn7sumedang.sch.id/__statics/gudangsoal/files/coin-master-free-spins-link-download-today_GM406889139.pdf
    • https://daring.mtsn7sumedang.sch.id/__statics/gudangsoal/files/114-hacks_GM479516143.pdf
    • https://daring.mtsn7sumedang.sch.id/__statics/gudangsoal/files/free-100-robux_GM431946152.pdf
    • https://daring.mtsn7sumedang.sch.id/__statics/gudangsoal/files/hack-coin-master-android-2021_GM406889139.pdf
    • https://daring.mtsn7sumedang.sch.id/__statics/gudangsoal/files/claim-free-robux_GM431946152.pdf
    • https://daring.mtsn7sumedang.sch.id/__statics/gudangsoal/files/free-robux-net_GM431946152.pdf
    • https://daring.mtsn7sumedang.sch.id/__statics/gudangsoal/files/optifine-pe_GM479516143.pdf
    • https://daring.mtsn7sumedang.sch.id/__statics/gudangsoal/files/spin-free-coin-master_GM406889139.pdf
    • https://daring.mtsn7sumedang.sch.id/__statics/gudangsoal/files/coin-master-free-spins-link-blogspot-2021_GM406889139.pdf
    • https://daring.mtsn7sumedang.sch.id/__statics/gudangsoal/files/roblox-rape_GM431946152.pdf
    • https://daring.mtsn7sumedang.sch.id/__statics/gudangsoal/files/how-do-you-get-free-robux-without-paying_GM431946152.pdf
    • https://daring.mtsn7sumedang.sch.id/__statics/gudangsoal/files/www-bandicam-com-free-robux_GM431946152.pdf
    • https://daring.mtsn7sumedang.sch.id/__statics/gudangsoal/files/how-to-get-minecraft-for-free-on-nintendo-switch_GM479516143.pdf
    • https://daring.mtsn7sumedang.sch.id/__statics/gudangsoal/files/coin-master-free-coins-and-spins_GM406889139.pdf
    • https://daring.mtsn7sumedang.sch.id/__statics/gudangsoal/files/blogspot-coin-master-free-spins_GM406889139.pdf
    • https://daring.mtsn7sumedang.sch.id/__statics/gudangsoal/files/free-coin-and-spin-in-coin-master_GM406889139.pdf
    • https://daring.mtsn7sumedang.sch.id/__statics/gudangsoal/files/play-minecraft-for-free_GM479516143.pdf
    • https://daring.mtsn7sumedang.sch.id/__statics/gudangsoal/files/coin-master-rewards_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off0000497e.bin
2551f3c3ddb30b9d5971788463283d40a61cdf95572f39d359454954b3fefd36		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x497E 32452 bytes
font_01_sfnt_off000091d7.bin
d0a2580a9848789708f711aeedd4c44eef26827bf748da476089155bc80243e8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x91D7 18344 bytes

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