Malicious PDF — malware analysis report

Static analysis result for SHA-256 b677084cde94c287…

MALICIOUS

PDF

46.4 KB Created: 2021-06-03 13:35:59 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 927b6346196571e0328b35bbd290cbd9 SHA-1: 0042fc8d43f5ed5de49c0c64228ad01aa3e938c6 SHA-256: b677084cde94c28734f74c8d00dae09f7d1084d4992ccf27c8b844412f03bf8d
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains embedded URLs and a document body that explicitly advertises free in-game currency and hacks, directly linking to a suspicious URL. The presence of a 'password-protected archive lure' heuristic suggests the downloaded content is likely encrypted to evade initial security checks. While no scripts were directly extracted, the PDF structure and embedded URI point towards a social engineering attack to trick users into downloading malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9748

Heuristics 4

  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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/431946152/free-free-robux-game-hack
    • https://elibrary.ikhac.ac.id/repository/coin-master-hack-spins-android_GM406889139.pdf
    • https://elibrary.ikhac.ac.id/repository/mathep_GM431946152.pdf
    • https://elibrary.ikhac.ac.id/repository/hacks-for-minecraft-bedrock_GM479516143.pdf
    • https://elibrary.ikhac.ac.id/repository/free-robux-hack-no-verification_GM431946152.pdf
    • https://elibrary.ikhac.ac.id/repository/coin-master-hack-no-download_GM406889139.pdf
    • https://elibrary.ikhac.ac.id/repository/roblox-cheat-money-android_GM431946152.pdf
    • https://elibrary.ikhac.ac.id/repository/free-roblox-gift-card_GM431946152.pdf
    • https://elibrary.ikhac.ac.id/repository/free-roblox-executor_GM431946152.pdf
    • https://elibrary.ikhac.ac.id/repository/roblox-booga-booga-hack_GM431946152.pdf
    • https://elibrary.ikhac.ac.id/repository/minecraft-ios-mods_GM479516143.pdf
    • https://elibrary.ikhac.ac.id/repository/coin-master-hack-apk-download_GM406889139.pdf
    • https://elibrary.ikhac.ac.id/repository/how-to-hack-peoples-roblox-accounts_GM431946152.pdf
    • https://elibrary.ikhac.ac.id/repository/how-to-get-more-robux-for-free_GM431946152.pdf
    • https://elibrary.ikhac.ac.id/repository/can-u-get-free-robux_GM431946152.pdf
    • https://elibrary.ikhac.ac.id/repository/minecraft-gun-games-free_GM479516143.pdf
    • https://elibrary.ikhac.ac.id/repository/www-robux-redeem_GM431946152.pdf
    • https://elibrary.ikhac.ac.id/repository/how-to-get-roblox-premium-for-free-2021_GM431946152.pdf
    • https://elibrary.ikhac.ac.id/repository/coin-master-free-spins-promo-code_GM406889139.pdf
    • https://elibrary.ikhac.ac.id/repository/minecraft-pvp-hacks_GM479516143.pdf
    • https://elibrary.ikhac.ac.id/repository/bloxpink-free-robux_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off000050de.bin
768438d8b4df6a4cdc5f512fa585916f4fb00217f2aca468e9d20434f7167d14		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x50DE 24892 bytes
font_01_sfnt_off000089ac.bin
1dfab032992e232d8ef996ecf69dba1c51fe16ea10218612c3df6347b27779f8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x89AC 2824 bytes
font_02_sfnt_off0000935c.bin
3ef9e48aa3d97d4217e004f7625a8cbae9320a74231b80a01553f6433e422360		 pdf-font-stream PDF embedded font (sfnt) at offset 0x935C 18012 bytes

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