Malicious PDF — malware analysis report

Static analysis result for SHA-256 023268090c7cd290…

MALICIOUS

PDF

34.4 KB Created: 2021-07-04 22:19:18 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 62f5472446f8fb096f002560b4814ca0 SHA-1: aa68bf90cd1a736b18a9d936b77246a63ae7d881 SHA-256: 023268090c7cd2902bdebc220e7be1155f1db50e577f64462cc206632fcd55e1
62 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The document contains multiple embedded URLs and a prominent call-to-action to download a file, strongly suggesting a phishing or social engineering lure. The ML classifier also flagged this PDF as malicious with high confidence. The primary IOC is the URL http://netcdn.tw/app/431946152/get-free-robux-game-hack, which is likely the download host for a secondary payload.

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 http://netcdn.tw/app/431946152/get-free-robux-game-hack
    • https://digilib-ppkn.stkip-pgri-sumbar.ac.id//repository/rbxcity-free-robux_GM431946152.pdf
    • https://digilib-ppkn.stkip-pgri-sumbar.ac.id/repository/roblox-skywars-fly-hack_GM431946152.pdf
    • https://digilib-ppkn.stkip-pgri-sumbar.ac.id/repository/is-minecraft-free-on-xbox-one_GM479516143.pdf
    • https://digilib-ppkn.stkip-pgri-sumbar.ac.id//repository/real-coin-master-hacks_GM406889139.pdf
    • https://digilib-ppkn.stkip-pgri-sumbar.ac.id/repository/how-to-hack-roblox-accounts-on-phone-2021_GM431946152.pdf
    • https://digilib-ppkn.stkip-pgri-sumbar.ac.id/repository/games-that-give-you-free-robux_GM431946152.pdf
    • https://digilib-ppkn.stkip-pgri-sumbar.ac.id/repository/how-to-buy-robux-in-roblox-for-free_GM431946152.pdf
    • https://digilib-ppkn.stkip-pgri-sumbar.ac.id/repository/roblox-edit-avatar-free_GM431946152.pdf
    • https://digilib-ppkn.stkip-pgri-sumbar.ac.id//repository/hacks-for-minecraft-windows-10_GM479516143.pdf
    • https://digilib-ppkn.stkip-pgri-sumbar.ac.id/repository/how-to-hack-roblox-go-through-walls-with-shift-lock_GM431946152.pdf
    • https://digilib-ppkn.stkip-pgri-sumbar.ac.id/repository/mcpe-master-coins-hack-download_GM406889139.pdf
    • https://digilib-ppkn.stkip-pgri-sumbar.ac.id//repository/free-roblox-followers-generator-2021_GM431946152.pdf
    • https://digilib-ppkn.stkip-pgri-sumbar.ac.id/repository/cheats-for-roblox-jailbreak-2021_GM431946152.pdf
    • https://digilib-ppkn.stkip-pgri-sumbar.ac.id/repository/how-to-hack-roblox-jailbreak-money-with-cheat-engine_GM431946152.pdf
    • https://digilib-ppkn.stkip-pgri-sumbar.ac.id/repository/coin-master-links-for-today_GM406889139.pdf
    • https://digilib-ppkn.stkip-pgri-sumbar.ac.id/repository/roblox-crashes-when-i-open-cheat-engine_GM431946152.pdf
    • https://digilib-ppkn.stkip-pgri-sumbar.ac.id//repository/coin-master-hack-2021-apk_GM406889139.pdf
    • https://digilib-ppkn.stkip-pgri-sumbar.ac.id/repository/daily-free-spin-coin-master-link_GM406889139.pdf
    • https://digilib-ppkn.stkip-pgri-sumbar.ac.id/repository/robux-free-unlimited_GM431946152.pdf
    • https://digilib-ppkn.stkip-pgri-sumbar.ac.id//repository/microsoft-roblox_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00003186.bin
54951b81866c58e82c553748fef06cdcb526d39b722fdbaf1044c4f23e38692f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x3186 21948 bytes
font_01_sfnt_off000061fa.bin
04d56578d6fa3a791f42370f0ef4c3dea66af1fdc194d67c4390c65d423efb6d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x61FA 18820 bytes

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