Malicious PDF — malware analysis report

Static analysis result for SHA-256 cc94fe2a56b1deb5…

MALICIOUS

PDF

42.5 KB Created: 2021-05-14 21:04:55 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 06da6c68af7906a3a6c69ffffe0b62d9 SHA-1: 30ed0b406c25acf04985a0582e3b1336f70a0275 SHA-256: cc94fe2a56b1deb51ccb102897115baa6f700928a92f96a1f5873ab81171a8df
82 Risk Score

Malware Insights

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

The document presents a fake CAPTCHA to trick the user into interacting with a malicious link, likely leading to a secondary payload download. The presence of embedded URLs and the ML classifier's high confidence score support this assessment. No scripts were extracted, but the document's structure and embedded URLs suggest a social engineering tactic to initiate a download.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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/how-to-hack-to-get-robux-game-hack
    • https://elearning.mtsnkampak.sch.id/__statics/gudangsoal/files/coin-master-free-spins-app-android_GM406889139.pdf
    • https://elearning.mtsnkampak.sch.id/__statics/gudangsoal/files/free-robux-no-anti-bot-verification_GM431946152.pdf
    • https://elearning.mtsnkampak.sch.id/__statics/gudangsoal/files/coin-master-free-coins-link-2021_GM406889139.pdf
    • https://elearning.mtsnkampak.sch.id/__statics/gudangsoal/files/robux-free-2021_GM431946152.pdf
    • https://elearning.mtsnkampak.sch.id/__statics/gudangsoal/files/how-to-hack-in-roblox-prison-life_GM431946152.pdf
    • https://elearning.mtsnkampak.sch.id/__statics/gudangsoal/files/free-robux-games-that-actually-work-2021_GM431946152.pdf
    • https://elearning.mtsnkampak.sch.id/__statics/gudangsoal/files/coin-master-free-spin-27_GM406889139.pdf
    • https://elearning.mtsnkampak.sch.id/__statics/gudangsoal/files/free-robux-site_GM431946152.pdf
    • https://elearning.mtsnkampak.sch.id/__statics/gudangsoal/files/how-to-get-daily-free-spins-on-coin-master_GM406889139.pdf
    • https://elearning.mtsnkampak.sch.id/__statics/gudangsoal/files/roblox-hack-me_GM431946152.pdf
    • https://elearning.mtsnkampak.sch.id/__statics/gudangsoal/files/free-game-pack-with-google-play-coin-master_GM406889139.pdf
    • https://elearning.mtsnkampak.sch.id/__statics/gudangsoal/files/coin-master-rewards_GM406889139.pdf
    • https://elearning.mtsnkampak.sch.id/__statics/gudangsoal/files/100-free-spins-coin-master_GM406889139.pdf
    • https://elearning.mtsnkampak.sch.id/__statics/gudangsoal/files/how-to-get-free-items-on-roblox_GM431946152.pdf
    • https://elearning.mtsnkampak.sch.id/__statics/gudangsoal/files/aimbot-download-roblox_GM431946152.pdf
    • https://elearning.mtsnkampak.sch.id/__statics/gudangsoal/files/coin-master-free-spin-link-new_GM406889139.pdf
    • https://elearning.mtsnkampak.sch.id/__statics/gudangsoal/files/how-to-hack-roblox-for-robux_GM431946152.pdf
    • https://elearning.mtsnkampak.sch.id/__statics/gudangsoal/files/getrobux-now_GM431946152.pdf
    • https://elearning.mtsnkampak.sch.id/__statics/gudangsoal/files/minecraft-realms-free-trial_GM479516143.pdf
    • https://elearning.mtsnkampak.sch.id/__statics/gudangsoal/files/coin-master-cheat-apk-free-download_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off0000486a.bin
db4df9c466b0afe352f87db5a95792ed7ebea5a7b924a63bd093d4d369d41637		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x486A 25384 bytes
font_01_sfnt_off000082c2.bin
e2a97b64806b22db336191728b408e5b7179700d4ee5fd3b4b30addea2706a3c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x82C2 18516 bytes

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