Malicious PDF — malware analysis report

Static analysis result for SHA-256 1829b435654f1307…

MALICIOUS

PDF

43.7 KB Created: 2021-05-19 21:28:39 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 467bc0c6b681c1ebe818ad73ac801fbb SHA-1: d5f36637348dcb1d10a7d4d500c3cf3a7463dad3 SHA-256: 1829b435654f1307bdcb3f702c57ce28f479d8603360f7c3e77c79da021e1aba
102 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 clicking malicious links. The embedded URL and numerous other URLs point to sites offering game hacks or free in-game currency, reinforcing the phishing or scam nature of the document. The ML classifier also strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9969

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/431946152/how-to-hack-roblox-accounts-on-phone-2021-game-hack
    • http://szekelymozes.ro/images/coin-master-free-spins-link-31-march-2021_GM406889139.pdf
    • http://szekelymozes.ro/images/coin-master-hack-online-2021_GM406889139.pdf
    • http://szekelymozes.ro/images/free-coin_GM406889139.pdf
    • http://szekelymozes.ro/images/get-robux-for-free-2021_GM431946152.pdf
    • http://szekelymozes.ro/images/add-robux_GM431946152.pdf
    • http://szekelymozes.ro/images/coin-master-daily-free-spins-2021_GM406889139.pdf
    • http://szekelymozes.ro/images/coin-master-free-spin-daily-link_GM406889139.pdf
    • http://szekelymozes.ro/images/roblox-free-robux-no-human-verification_GM431946152.pdf
    • http://szekelymozes.ro/images/coin-master-mod-apk-hack_GM406889139.pdf
    • http://szekelymozes.ro/images/rbxoffers-earn-free-robux_GM431946152.pdf
    • http://szekelymozes.ro/images/free-robux-codes-no-verification-2021_GM431946152.pdf
    • http://szekelymozes.ro/images/coin-master-free-spin-and-coins-links-2021_GM406889139.pdf
    • http://szekelymozes.ro/images/how-to-get-stuff-that-cost-coins-free-mcpe-master_GM406889139.pdf
    • http://szekelymozes.ro/images/free-free-robux_GM431946152.pdf
    • http://szekelymozes.ro/images/robloxfun-com-generator_GM431946152.pdf
    • http://szekelymozes.ro/images/coin-master-app-hacks_GM406889139.pdf
    • http://szekelymozes.ro/images/coin-master-links-free-spins_GM406889139.pdf
    • http://szekelymozes.ro/images/how-do-we-get-free-robux_GM431946152.pdf
    • http://szekelymozes.ro/images/free-robux-hack-2021_GM431946152.pdf
    • http://szekelymozes.ro/images/is-roblox-hacked_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000492d.bin
1ace62ed5731d1eb684037690bf516e95b8019a526fc36d5e6ef4cfd4a174fd1
pdf-font-stream PDF embedded font (sfnt) at offset 0x492D 25796 bytes
font_01_sfnt_off0000857e.bin
ee3ccdf346fecf17211ec9caf874d857695d657b5f92e2b1f0fe00576c016ffb
pdf-font-stream PDF embedded font (sfnt) at offset 0x857E 19312 bytes