Malicious PDF — malware analysis report

Static analysis result for SHA-256 89e318ac235ec79e…

MALICIOUS

PDF

42.9 KB Created: 2021-05-12 21:01:38 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 83f821b56816e7063370efadfb03e62a SHA-1: 38bb8e8965622beb475ee5dd8be6cbba4a738219 SHA-256: 89e318ac235ec79efcd80164bb5cc90750df62817e651d36f5d2499a5b25a406
62 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 User Execution: Malicious File

The PDF document contains a lure referencing popular games like Coin Master and Roblox, combined with a visual download button, suggesting a phishing or scam attempt to trick users into downloading malicious content. The ML classifier strongly flagged this PDF as malicious, and embedded URLs point to potentially harmful files. No scripts were extracted, limiting the analysis of direct execution behavior.

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/406889139/coin-master-event-hack-game-hack
    • https://elearning.man1jember.sch.id/__statics/gudangsoal/files/free-robux-promo-codes-2021_GM431946152.pdf
    • https://elearning.man1jember.sch.id/__statics/gudangsoal/files/free-daily-spins-coin-master_GM406889139.pdf
    • https://elearning.man1jember.sch.id/__statics/gudangsoal/files/minecraft-pe-free-download-ios_GM479516143.pdf
    • https://elearning.man1jember.sch.id/__statics/gudangsoal/files/minecraft-mojang-free_GM479516143.pdf
    • https://elearning.man1jember.sch.id/__statics/gudangsoal/files/how-to-hack-roblox-accounts-on-phone_GM431946152.pdf
    • https://elearning.man1jember.sch.id/__statics/gudangsoal/files/coin-master-free-spins-2021-blogspot_GM406889139.pdf
    • https://elearning.man1jember.sch.id/__statics/gudangsoal/files/roblox-hacks-and-cheats_GM431946152.pdf
    • https://elearning.man1jember.sch.id/__statics/gudangsoal/files/can-you-get-robux-for-free_GM431946152.pdf
    • https://elearning.man1jember.sch.id/__statics/gudangsoal/files/claimrobux-net_GM431946152.pdf
    • https://elearning.man1jember.sch.id/__statics/gudangsoal/files/coin-master-free-spin-link-today-2021_GM406889139.pdf
    • https://elearning.man1jember.sch.id/__statics/gudangsoal/files/free-robux-gift-card_GM431946152.pdf
    • https://elearning.man1jember.sch.id/__statics/gudangsoal/files/free-robux-websites-that-actually-work_GM431946152.pdf
    • https://elearning.man1jember.sch.id/__statics/gudangsoal/files/how-to-get-free-spins-and-coins-on-coin-master_GM406889139.pdf
    • https://elearning.man1jember.sch.id/__statics/gudangsoal/files/how-do-u-get-free-robux-2021_GM431946152.pdf
    • https://elearning.man1jember.sch.id/__statics/gudangsoal/files/coin-master-free-spins-a2z-help_GM406889139.pdf
    • https://elearning.man1jember.sch.id/__statics/gudangsoal/files/cute-free-roblox-clothes_GM431946152.pdf
    • https://elearning.man1jember.sch.id/__statics/gudangsoal/files/free-coins-coin-master-spins_GM406889139.pdf
    • https://elearning.man1jember.sch.id/__statics/gudangsoal/files/how-to-get-free-coins-in-mcpe-master_GM406889139.pdf
    • https://elearning.man1jember.sch.id/__statics/gudangsoal/files/free-800-robux_GM431946152.pdf
    • https://elearning.man1jember.sch.id/__statics/gudangsoal/files/free-free-robux_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004bf7.bin
f4459e2a243fea0b8738b566b0a3b3ff694bac26d16535f6fb103ff455411215		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4BF7 25728 bytes
font_01_sfnt_off0000866d.bin
3aa3979f7db9db60f85c12743f17b039c262b8ea7d603c2f9581d8dcabd3843c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x866D 17828 bytes

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