Malicious PDF — malware analysis report

Static analysis result for SHA-256 b62112a1ddfae843…

MALICIOUS

PDF

44.5 KB Created: 2021-05-17 12:38:44 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: eefd06cb8a932b9bd8452cfa9cfe203c SHA-1: 285458d66b4fdffbf7cf1d1f43a8bd06030d9cf1 SHA-256: b62112a1ddfae8431b85698ff173f1cd91a2178b8b7b92b8e21d832520a66ac9
82 Risk Score

Malware Insights

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

The document presents a fake CAPTCHA or human verification prompt, a common lure to trick users into interacting with malicious content. It contains an embedded URI pointing to a suspicious URL, likely intended to download a second-stage payload. The presence of numerous links to game-related freebies suggests a phishing or scam attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9632

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/479516143/tiktok-minecraft-hacks-game-hack
    • http://aiyta.com/images/coin-master-free-spins-moonactive_GM406889139.pdf
    • http://aiyta.com/images/free-robux-easy-and-fast_GM431946152.pdf
    • http://aiyta.com/images/roblox-studio-free-download_GM431946152.pdf
    • http://aiyta.com/images/get-robux-for-free-2021_GM431946152.pdf
    • http://aiyta.com/images/free-robux-roblox-promo-codes_GM431946152.pdf
    • http://aiyta.com/images/how-to-get-free-robux-hack-2021_GM431946152.pdf
    • http://aiyta.com/images/roblox-gang_GM431946152.pdf
    • http://aiyta.com/images/earn-free-robux-for-roblox_GM431946152.pdf
    • http://aiyta.com/images/free-roblox-clothes-girl_GM431946152.pdf
    • http://aiyta.com/images/coin-master-free-spins--coins-2021_GM406889139.pdf
    • http://aiyta.com/images/free-robux-by-watching-ads_GM431946152.pdf
    • http://aiyta.com/images/free-games-like-roblox_GM431946152.pdf
    • http://aiyta.com/images/robux-free-2021_GM431946152.pdf
    • http://aiyta.com/images/coin-master-daily-free-spins-link-facebook_GM406889139.pdf
    • http://aiyta.com/images/daily-spin-and-coin_GM406889139.pdf
    • http://aiyta.com/images/how-to-hack-roblox-for-robux_GM431946152.pdf
    • http://aiyta.com/images/free-robux-gift-card_GM431946152.pdf
    • http://aiyta.com/images/free-2021-robux_GM431946152.pdf
    • http://aiyta.com/images/app-store-coin-master-free-spins_GM406889139.pdf
    • http://aiyta.com/images/free-spins-coin-master-2021-today_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004a8e.bin
c715ce7179f813dd4ea8c6d7398880639c46d17a8989cf58392189fd39a48a25		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4A8E 24768 bytes
font_01_sfnt_off000082c2.bin
10d025f04f706eb71cdda4f99784df1b9ccb52e48080e43095e0398eaef6f132		 pdf-font-stream PDF embedded font (sfnt) at offset 0x82C2 2880 bytes
font_02_sfnt_off00008cad.bin
df7e49ec95a548ee0d23b7b279df4e27423bf5bf6641f50b7ca94314a26af21a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8CAD 17880 bytes

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