Malicious PDF — malware analysis report

Static analysis result for SHA-256 b5868a068eb89130…

MALICIOUS

PDF

36.7 KB Created: 2021-05-22 11:56:44 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: e6af026b3df03859dccd2b5136f81514 SHA-1: 81c8b0a508ffa12c02747b5c53689c6ba1524229 SHA-256: b5868a068eb891309b5a8059550a096792a02e421d0abe800a9db456abddaf5a
62 Risk Score

Malware Insights

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

The PDF document contains multiple embedded URLs and a prominent call-to-action to download a "Free Robux Hack 2021". The ML classifier strongly flagged this PDF as malicious, and the presence of numerous suspicious URLs related to game exploits indicates a phishing or scam attempt. No scripts were extracted, but the document's structure and content suggest it's designed to trick users into downloading potentially malicious content or visiting scam websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9447

Heuristics 4

  • 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/free-robux-hack-2021-game-hack
    • http://hk-kan.org/images/get-free-cards-for-coin-master_GM406889139.pdf
    • http://hk-kan.org/images/www-free-robux-com_GM431946152.pdf
    • http://hk-kan.org/images/how-to-hack-roblox-accounts-on-phone_GM431946152.pdf
    • http://hk-kan.org/images/free-roblox-website_GM431946152.pdf
    • http://hk-kan.org/images/coin-master-free-coins-2021_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_002_off000033c4.bin
f6ca30cc6da2f0b034eaf6e7ec196cd27970128294fe083dd2f0d21faa071034		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x33C4 24620 bytes
font_01_sfnt_off00006c5a.bin
b2e74e066e927f416452387fe7118a02e4882588ce64a473b0bf6318b488dee0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6C5A 18816 bytes

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