Malicious PDF — malware analysis report

Static analysis result for SHA-256 cce263410fabbc2c…

MALICIOUS

PDF

48.4 KB Created: 2021-06-07 08:58:54 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 1fb18f761c883da8880c704fcff78ab1 SHA-1: 7460aa98e79fb6b9dd290f846864fcff8e52956c SHA-256: cce263410fabbc2c9cc8260e9d38662748fb4a259377bd58652dcec9a31a839e
82 Risk Score

Malware Insights

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

The PDF document contains a fake CAPTCHA lure, designed to trick the user into interacting with the document. It also embeds external URLs, one of which is directly linked to a potential download. The ML classifier strongly indicates maliciousness, suggesting the document is part of a malicious workflow, likely to download a second-stage payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9796

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.tw/app/431946152/free-andrbirds-head-roblox-game-hack
    • http://junktiquecollector.com/images/easy-how-to-get-free-robux_GM431946152.pdf
    • http://junktiquecollector.com/images/how-to-hack-coins-in-archery-master-3d_GM406889139.pdf
    • http://junktiquecollector.com/images/how-to-hack-someones-minecraft-account_GM479516143.pdf
    • http://junktiquecollector.com/images/how-to-hack-coin-master-game-2021_GM406889139.pdf
    • http://junktiquecollector.com/images/free-robux-no-verification-2021_GM431946152.pdf
    • http://junktiquecollector.com/images/coin-master-hack-2021-android-apk_GM406889139.pdf
    • http://junktiquecollector.com/images/free-minecraft-svg-cutting-files_GM479516143.pdf
    • http://junktiquecollector.com/images/coin-master--hack_GM406889139.pdf
    • http://junktiquecollector.com/images/minecraft-free-computer-game_GM479516143.pdf
    • http://junktiquecollector.com/images/free-robux-with-no-verification-2021_GM431946152.pdf
    • http://junktiquecollector.com/images/minecraft-jar-free_GM479516143.pdf
    • http://junktiquecollector.com/images/robuxy-com-free-robux_GM431946152.pdf
    • http://junktiquecollector.com/images/what-is-a-robux_GM431946152.pdf
    • http://junktiquecollector.com/images/coin-master-facebook_GM406889139.pdf
    • http://junktiquecollector.com/images/free-robux-hacker-us_GM431946152.pdf
    • http://junktiquecollector.com/images/free-roblox-hack-us_GM431946152.pdf
    • http://junktiquecollector.com/images/all-roblox-dance-hacks_GM431946152.pdf
    • http://junktiquecollector.com/images/free-robux-cards_GM431946152.pdf
    • http://junktiquecollector.com/images/how-do-u-get-free-robux_GM431946152.pdf
    • http://junktiquecollector.com/images/coin-master-hack-tips_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004fb2.bin
65e3afa623e80ab28bcfe7ae9ad2e6b3938d56994f274007d032b89d944ee179		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4FB2 26464 bytes
font_01_sfnt_off00008d48.bin
9a13c2580265a78e8a7257496a31ee0055738af7e20a5661c2902efe4bf05ce5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8D48 5596 bytes
font_02_sfnt_off000099f0.bin
fe5e6d2a2e607a46a86d12a9c670618df287733d6503a1fa2f021e621a86dc33		 pdf-font-stream PDF embedded font (sfnt) at offset 0x99F0 18472 bytes

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