Malicious PDF — malware analysis report

Static analysis result for SHA-256 ef548fb8cfc19361…

MALICIOUS

PDF

44.7 KB Created: 2021-05-15 00:14:27 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 185e06943985333d38593cdda594383e SHA-1: 8dd7c776c824b9a002e6119529a6047dc1ed25ae SHA-256: ef548fb8cfc193611c118817f34ad6c1a3e9b16aba5abbdfad624f10ae533e5e
62 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains embedded URLs and a call-to-action lure for 'Free Robux', indicating a phishing or scam attempt. The ML classifier strongly flagged this PDF as malicious. While no scripts were explicitly extracted, the presence of external URIs and the document's content suggest it is designed to trick users into downloading further malicious content, likely related to game cheats or exploits.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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-apps-game-hack
    • http://www.elearning.man2bandung.sch.id/__statics/gudangsoal/files/free-robux-generator_GM431946152.pdf
    • http://www.elearning.man2bandung.sch.id/__statics/gudangsoal/files/how-do-i-get-free-spins-in-coin-master_GM406889139.pdf
    • http://www.elearning.man2bandung.sch.id/__statics/gudangsoal/files/no-human-verification-hack-for-coin-master_GM406889139.pdf
    • http://www.elearning.man2bandung.sch.id/__statics/gudangsoal/files/coin-master-free-spins-and-coins-link-blogspot_GM406889139.pdf
    • http://www.elearning.man2bandung.sch.id/__statics/gudangsoal/files/www-coin-master-hack-com_GM406889139.pdf
    • http://www.elearning.man2bandung.sch.id/__statics/gudangsoal/files/coin-master-hack-2021-android_GM406889139.pdf
    • http://www.elearning.man2bandung.sch.id/__statics/gudangsoal/files/mathep_GM431946152.pdf
    • http://www.elearning.man2bandung.sch.id/__statics/gudangsoal/files/free-robux-hack-2021_GM431946152.pdf
    • http://www.elearning.man2bandung.sch.id/__statics/gudangsoal/files/coin-master-hack-spins-app_GM406889139.pdf
    • http://www.elearning.man2bandung.sch.id/__statics/gudangsoal/files/minecraft-windows-10-code-free_GM479516143.pdf
    • http://www.elearning.man2bandung.sch.id/__statics/gudangsoal/files/cute-free-roblox-clothes_GM431946152.pdf
    • http://www.elearning.man2bandung.sch.id/__statics/gudangsoal/files/minecraft-toolbox-premium-apk_GM479516143.pdf
    • http://www.elearning.man2bandung.sch.id/__statics/gudangsoal/files/free-25-spins-coin-master-links_GM406889139.pdf
    • http://www.elearning.man2bandung.sch.id/__statics/gudangsoal/files/https-iosgodscom-topic-20214coinmasterhack_GM406889139.pdf
    • http://www.elearning.man2bandung.sch.id/__statics/gudangsoal/files/how-to-hack-roblox-accounts-on-phone_GM431946152.pdf
    • http://www.elearning.man2bandung.sch.id/__statics/gudangsoal/files/minecraft-pe-mod-menu_GM479516143.pdf
    • http://www.elearning.man2bandung.sch.id/__statics/gudangsoal/files/free-robux-com-no-verification_GM431946152.pdf
    • http://www.elearning.man2bandung.sch.id/__statics/gudangsoal/files/rbx-land-free-robux_GM431946152.pdf
    • http://www.elearning.man2bandung.sch.id/__statics/gudangsoal/files/how-to-hack-roblox-2021_GM431946152.pdf
    • http://www.elearning.man2bandung.sch.id/__statics/gudangsoal/files/free-minecraft-realms-to-join_GM479516143.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004dc4.bin
594a8a830aa6dd1d70d6abd929a64381566d22f6beacbaa8468838a097c860db		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4DC4 28932 bytes
font_01_sfnt_off00008cc5.bin
dd781f2eaffddff6619a7729b763fabd5b8c4a088eef07f4c149f41bf202d502		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8CC5 18192 bytes

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