Malicious PDF — malware analysis report

Static analysis result for SHA-256 ad23b429e00f172a…

MALICIOUS

PDF

31.1 KB Created: 2021-07-19 01:10:12 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: d4561f9728703b107149826eedd785c5 SHA-1: 2fa9cdb7562c63f5dbb497083c6481732cf2f345 SHA-256: ad23b429e00f172a300622f8388c0d3f46aa9c2d5e6b7c7e1210df720f63649b
62 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The document body contains text and embedded URLs related to hacking Roblox accounts and accessing 'Robux generators', which is a common lure for phishing or malware distribution. The presence of multiple suspicious URLs, combined with a high ML classifier score, indicates a malicious intent to redirect users to potentially harmful sites. No scripts were extracted, but the document's content and embedded URIs strongly suggest a phishing or scam attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9426

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 http://netcdn.tw/app/431946152/how-to-hack-roblox-accounts-on-phone-game-hack
    • http://iprep-u.com/images/coin-master-daily-free-spins-link-app_GM406889139.pdf
    • http://iprep-u.com/images/free-spin-in-coin-master_GM406889139.pdf
    • http://iprep-u.com/images/how-to-install-minecraft-for-free_GM479516143.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000237b.bin
1bdad3784f8389640242f0979f87d3a0360ca77f98b67627db454b4f2c351ea5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x237B 22532 bytes
font_01_sfnt_off0000559b.bin
f8e74fa4b968a16dd44a94031ef99ed5be14016bd7b993395bbd98667463fda9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x559B 19096 bytes

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