Malicious PDF — malware analysis report

Static analysis result for SHA-256 5e3f0c742feb4676…

MALICIOUS

PDF

44.3 KB Created: 2021-06-03 10:49:21 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 78921b011d738ff18d441483692447e5 SHA-1: 556e5d9a57fba5d6d4264097db5d40d8f2cfe063 SHA-256: 5e3f0c742feb46766c53cd669c6bb9395bd0260574661b9f45cc353305504ff7
62 Risk Score

Malware Insights

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

The PDF document contains a lure related to 'Coin Master Daily Free Spins' and includes an external URI pointing to a download link. The presence of multiple embedded URLs, some of which are also PDFs, suggests a phishing or malware distribution attempt. The ML classifier also flagged this PDF as malicious with high confidence.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

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-daily-free-spins-link-download-game-hack
    • https://ifef.es/ckfinder/userfiles/files/coin-master-free-spins-23-march-2021_GM406889139.pdf
    • https://ifef.es/ckfinder/userfiles/files/roblox-piano-hack_GM431946152.pdf
    • https://ifef.es/ckfinder/userfiles/files/how-to-hack-minecraft-pe_GM479516143.pdf
    • https://ifef.es/ckfinder/userfiles/files/free-coins-and-spins-coin-master-2021_GM406889139.pdf
    • https://ifef.es/ckfinder/userfiles/files/game-hack-coin-master_GM406889139.pdf
    • https://ifef.es/ckfinder/userfiles/files/earn-robux-com_GM431946152.pdf
    • https://ifef.es/ckfinder/userfiles/files/how-to-hack-someones-roblox-account_GM431946152.pdf
    • https://ifef.es/ckfinder/userfiles/files/how-to-get-free-robux-easy-on-phone_GM431946152.pdf
    • https://ifef.es/ckfinder/userfiles/files/minecraft-free-app_GM479516143.pdf
    • https://ifef.es/ckfinder/userfiles/files/how-do-i-get-free-spins-in-coin-master_GM406889139.pdf
    • https://ifef.es/ckfinder/userfiles/files/free-vpn-for-minecraft_GM479516143.pdf
    • https://ifef.es/ckfinder/userfiles/files/coin-master-viking-quest-hack_GM406889139.pdf
    • https://ifef.es/ckfinder/userfiles/files/minecraft-classic-free_GM479516143.pdf
    • https://ifef.es/ckfinder/userfiles/files/free-foxy-food-coin-master_GM406889139.pdf
    • https://ifef.es/ckfinder/userfiles/files/minecraft-windows-10-free-with-java_GM479516143.pdf
    • https://ifef.es/ckfinder/userfiles/files/coin-master-hacks-xyz_GM406889139.pdf
    • https://ifef.es/ckfinder/userfiles/files/free-robux-codes-2021_GM431946152.pdf
    • https://ifef.es/ckfinder/userfiles/files/free-coin-master-spins-2021_GM406889139.pdf
    • https://ifef.es/ckfinder/userfiles/files/how-to-get-a-free-minecraft-account_GM479516143.pdf
    • https://ifef.es/ckfinder/userfiles/files/coin-master-hacks_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off0000506a.bin
80491d38d5d26c32b3221ef30c27b4e3e4846600442663ee3884565a6aee3072
decompressed-pdf-stream PDF FlateDecoded stream at offset 0x506A 24956 bytes
font_01_sfnt_off000088c1.bin
9c26c181c4cdabeaa0059472f140f722c9ebd74ce71ebd91f88ed40d9942d1a6
pdf-font-stream PDF embedded font (sfnt) at offset 0x88C1 18816 bytes