Malicious PDF — malware analysis report

Static analysis result for SHA-256 2686517c24f8747d…

MALICIOUS

PDF

42.2 KB Created: 2021-06-03 22:22:14 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 9ec2a39e1668b5c45c03a321eae35eff SHA-1: c9f2c8714e7e6c8ffc5691163f621f5d8d5534a0 SHA-256: 2686517c24f8747de1efa6363071bb20d79491016c56566a46a46b1dd83f7ff2
62 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF document contains a lure related to "Coin Master" free spins and a hack, directing users to a suspicious URL. The ML classifier strongly flagged this PDF as malicious. While no explicit scripts were found, the embedded URI and the document's content suggest a phishing or malware distribution attempt, likely initiated via spearphishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9874

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.online/app/406889139/coin-master-heaven-free-spins-game-hack
    • https://library.iuli.ac.id/repository/free-spins-coin-master-links-no-human-verification_GM406889139.pdf
    • https://library.iuli.ac.id/repository/coin-master-daily-free-spins-link-facebook_GM406889139.pdf
    • https://library.iuli.ac.id/repository/coin-master-free-online_GM406889139.pdf
    • https://library.iuli.ac.id/repository/free-robux-generator-no-verification-2021_GM431946152.pdf
    • https://library.iuli.ac.id/repository/actual-free-robux_GM431946152.pdf
    • https://library.iuli.ac.id/repository/coin-master-free-spins-uk_GM406889139.pdf
    • https://library.iuli.ac.id/repository/hack-coin-master-apk-33_GM406889139.pdf
    • https://library.iuli.ac.id/repository/coin-master-free-spins-2021_GM406889139.pdf
    • https://library.iuli.ac.id/repository/apps-that-give-you-free-robux_GM431946152.pdf
    • https://library.iuli.ac.id/repository/easy-robux-hack_GM431946152.pdf
    • https://library.iuli.ac.id/repository/coin-master-free-spins-glitch_GM406889139.pdf
    • https://library.iuli.ac.id/repository/roblox-skin-free_GM431946152.pdf
    • https://library.iuli.ac.id/repository/2021-coin-master-hack-without-verification_GM406889139.pdf
    • https://library.iuli.ac.id/repository/coin-master-free-coins-and-spins-link_GM406889139.pdf
    • https://library.iuli.ac.id/repository/free-robux-games_GM431946152.pdf
    • https://library.iuli.ac.id/repository/earn-free-robux-on-roblox_GM431946152.pdf
    • https://library.iuli.ac.id/repository/free-script-executor-roblox_GM431946152.pdf
    • https://library.iuli.ac.id/repository/coin-master-free-spins-app_GM406889139.pdf
    • https://library.iuli.ac.id/repository/how-to-hack-roblox-accounts-on-phone_GM431946152.pdf
    • https://library.iuli.ac.id/repository/free-robux-generator-2021_GM431946152.pdf
    • https://www.urcouponsdeal.com/2019/03/coin-master-free-spin-and-coin-links.html
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00004c66.bin
033b73146c7bfeace0368dc6e48595558ab940875fc41fbc8ca1ee7e1c3b1e28		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4C66 23940 bytes
font_01_sfnt_off000082df.bin
6cee86ead4aeee921a3b6e14ddf6eb594f4a141ca364aa42231f8e25adb97f4a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x82DF 18000 bytes

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