Malicious PDF — malware analysis report

Static analysis result for SHA-256 4b6edf819dd7e2cc…

MALICIOUS

PDF

42.7 KB Created: 2021-05-12 08:32:52 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 4d5171a62a13b9ee46a8e3b36e129d52 SHA-1: 714c8b0df953cebde1fbbbd74f39f73e63b4431c SHA-256: 4b6edf819dd7e2cce9f0df67daf4c64641e71496af8f77d1200b11d18d974612
62 Risk Score

Malware Insights

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

The PDF document contains numerous embedded URLs, many of which are related to game hacks and free virtual currency, suggesting a lure for potentially unwanted downloads or phishing. The presence of a callback lure heuristic further indicates a potential scam or phishing attempt. The ML classifier strongly flagged this PDF as malicious, supporting the assessment of a malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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-no-verification-2021-game-hack
    • https://esl.hess.com.tw/image/data/files/coin-master-hack-without-root_GM406889139.pdf
    • https://esl.hess.com.tw/image/data/files/coin-master-free-coins-link-2021_GM406889139.pdf
    • https://esl.hess.com.tw/image/data/files/coin-master-hack-no-survey_GM406889139.pdf
    • https://esl.hess.com.tw/image/data/files/spin-coin-master-free_GM406889139.pdf
    • https://esl.hess.com.tw/image/data/files/earn-free-robux-today_GM431946152.pdf
    • https://esl.hess.com.tw/image/data/files/get-minecraft-windows-10-free_GM479516143.pdf
    • https://esl.hess.com.tw/image/data/files/coin-master-35-13-hack-download_GM406889139.pdf
    • https://esl.hess.com.tw/image/data/files/how-do-u-get-free-robux-2021_GM431946152.pdf
    • https://esl.hess.com.tw/image/data/files/free-spin-coin-master-app-download_GM406889139.pdf
    • https://esl.hess.com.tw/image/data/files/coin-master-hack-apk-july-2021_GM406889139.pdf
    • https://esl.hess.com.tw/image/data/files/free-robux-survey_GM431946152.pdf
    • https://esl.hess.com.tw/image/data/files/how-to-get-free-roebucks_GM431946152.pdf
    • https://esl.hess.com.tw/image/data/files/ro-ghoul-script_GM431946152.pdf
    • https://esl.hess.com.tw/image/data/files/hackear-coin-master-espaol_GM406889139.pdf
    • https://esl.hess.com.tw/image/data/files/how-to-hack-roblox-to-get-free-robux_GM431946152.pdf
    • https://esl.hess.com.tw/image/data/files/abd-roblox_GM431946152.pdf
    • https://esl.hess.com.tw/image/data/files/coin-master-deals_GM406889139.pdf
    • https://esl.hess.com.tw/image/data/files/can-you-give-me-robux_GM431946152.pdf
    • https://esl.hess.com.tw/image/data/files/free-spins-and-coins-coin-master-2021-link_GM406889139.pdf
    • https://esl.hess.com.tw/image/data/files/coin-master-daily-free-spins-link-today-2021_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000049c3.bin
2ca0a1b962ad08ed3afa126924c2c3ca2b7d938b3cf204bf0a7b907edf1d7607
pdf-font-stream PDF embedded font (sfnt) at offset 0x49C3 24396 bytes
font_01_sfnt_off00008210.bin
d712ae43aec968503a6d4b8ef93db90b07e4d7d9799b66e9787cf09d99ae12e2
pdf-font-stream PDF embedded font (sfnt) at offset 0x8210 19004 bytes