Malicious PDF — malware analysis report

Static analysis result for SHA-256 e18b56e57f7b910f…

MALICIOUS

PDF

45.1 KB Created: 2021-05-19 10:25:39 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 306c441db309221df92a064efcbe01d3 SHA-1: acd619b3dfdf1d34d799f6ef1f9790ab9fffd032 SHA-256: e18b56e57f7b910f7a417f9c8447be71b133365d2d8f103ecdb718c252001341
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 clicking embedded links. The primary link points to a URL associated with game hacks, suggesting a social engineering tactic to deliver potentially unwanted or malicious software. The ML classifier also flagged this PDF as malicious with high confidence.

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/406889139/coin-master-how-to-get-japan-sushi-card-free-game-hack PDF link annotation
    • http://aviaprofsoyuz.info/images/toolbox-premium-apk_GM479516143.pdfIn PDF document text
    • http://aviaprofsoyuz.info/images/how-to-get-free-spins-on-coin-master-game_GM406889139.pdfIn PDF document text
    • http://aviaprofsoyuz.info/images/roblox-free-draw_GM431946152.pdfIn PDF document text
    • http://aviaprofsoyuz.info/images/mcpe-master-hack-coin-apk_GM406889139.pdfIn PDF document text
    • http://aviaprofsoyuz.info/images/free-robux-kid-friendly-no-human-verification_GM431946152.pdfIn PDF document text
    • http://aviaprofsoyuz.info/images/free-robux-hack-us_GM431946152.pdfIn PDF document text
    • http://aviaprofsoyuz.info/images/coin-master-free-spins-today-daily-links_GM406889139.pdfIn PDF document text
    • http://aviaprofsoyuz.info/images/wurst-112_GM479516143.pdfIn PDF document text
    • http://aviaprofsoyuz.info/images/ultimate-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://aviaprofsoyuz.info/images/free-robux-no-generator_GM431946152.pdfIn PDF document text
    • http://aviaprofsoyuz.info/images/plug-toolbox-for-minecraft-free-ios_GM479516143.pdfIn PDF document text
    • http://aviaprofsoyuz.info/images/coin-master-hack-tool-v1-9-pc_GM406889139.pdfIn PDF document text
    • http://aviaprofsoyuz.info/images/coin-master-free-spins-link-today_GM406889139.pdfIn PDF document text
    • http://aviaprofsoyuz.info/images/roblox-devil_GM431946152.pdfIn PDF document text
    • http://aviaprofsoyuz.info/images/robloxheroxyz-free-robux_GM431946152.pdfIn PDF document text
    • http://aviaprofsoyuz.info/images/free-spins-coin-master-app-iphone_GM406889139.pdfIn PDF document text
    • http://aviaprofsoyuz.info/images/safe-hack-for-coin-master-android_GM406889139.pdfIn PDF document text
    • http://aviaprofsoyuz.info/images/coin-master-generator-free_GM406889139.pdfIn PDF document text
    • http://aviaprofsoyuz.info/images/roblox-jailbreak-hack-download_GM431946152.pdfIn PDF document text
    • http://aviaprofsoyuz.info/images/how-to-hack-coin-master-with-game-guardian_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_off0000499f.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x499F 24788 bytes
SHA-256: 2b391129d13cf168abe9b5930f70176c4d7716a1704589f2fb1f70f03ac0c12f
font_01_sfnt_off000081d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x81D7 18696 bytes
SHA-256: b658d8f1c141fc8c479f08926c8ce77f4430151ae81ac58e32bab20f08e84866
font_02_sfnt_off0000a4ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA4FF 3264 bytes
SHA-256: e32c06502c11b52acb5e814091c5fdbffd1e2a904ac7a9cfb8b5b180bd139088

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