Malicious PDF — malware analysis report

Static analysis result for SHA-256 b14115f55907040c…

MALICIOUS

PDF

44.2 KB Created: 2021-05-19 11:55:07 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 9871768fe5bcd7d3f212f41ddcd0deaa SHA-1: 32a5886c1e4c0dab6c46d590df5dd359e39fb73d SHA-256: b14115f55907040ce1278a36b5ddeba8fa5db30520b24a1c656407924794472e
102 Risk Score

Malware Insights

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

The document presents itself as a lure for free spins and coins, likely related to a game, and contains a fake CAPTCHA heuristic. It also includes numerous embedded URLs pointing to similar scam-related content. The primary malicious URL is https://netcdn.xyz/app/406889139/free-spins-and-coins-coin-master-link-2021-game-hack, which is likely the intended destination for the user after being tricked by the fake CAPTCHA.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 5

  • 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
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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/free-spins-and-coins-coin-master-link-2021-game-hack
    • http://julo-it.net/images/coin-master-tiradas-gratis-2021_GM406889139.pdf
    • http://julo-it.net/images/coin-master-free-blogspot_GM406889139.pdf
    • http://julo-it.net/images/get-free-spins-for-coin-master_GM406889139.pdf
    • http://julo-it.net/images/free-spins-october-28-2021-coin-master_GM406889139.pdf
    • http://julo-it.net/images/hack-coin-master-android_GM406889139.pdf
    • http://julo-it.net/images/coin-master-hacking-news_GM406889139.pdf
    • http://julo-it.net/images/free-roblox-intros_GM431946152.pdf
    • http://julo-it.net/images/hack-coin-master-android-game_GM406889139.pdf
    • http://julo-it.net/images/websites-that-give-you-free-robux_GM431946152.pdf
    • http://julo-it.net/images/coin-master-free-chip_GM406889139.pdf
    • http://julo-it.net/images/classic-minecraft-net-hacks_GM479516143.pdf
    • http://julo-it.net/images/free-roblox-adopt-me-pets_GM431946152.pdf
    • http://julo-it.net/images/minecraft-alt-accounts-free_GM479516143.pdf
    • http://julo-it.net/images/where-tiktok-free-view-iphone-11_GM835599320.pdf
    • http://julo-it.net/images/roblox-help-free-robux_GM431946152.pdf
    • http://julo-it.net/images/hack-game-coin-master_GM406889139.pdf
    • http://julo-it.net/images/coin-master-free-spins-2021_GM406889139.pdf
    • http://julo-it.net/images/haktuts-coin-master-free-daily-spins_GM406889139.pdf
    • http://julo-it.net/images/coin-master-home_GM406889139.pdf
    • http://julo-it.net/images/minecraft-mobile-free_GM479516143.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off000049f9.bin
616f9b91c4cc75543e97eaf41eb61312f51fbcfcde3c1ee007b7ac3a892cbe35
decompressed-pdf-stream PDF FlateDecoded stream at offset 0x49F9 29280 bytes
font_01_sfnt_off0000897d.bin
21453a49cd95b47374badb5f9754a763ab250e679095952556df99ea2beff8a3
pdf-font-stream PDF embedded font (sfnt) at offset 0x897D 18632 bytes