Malicious PDF — malware analysis report

Static analysis result for SHA-256 7f4c604e9c55c3f3…

MALICIOUS

PDF

46.5 KB Created: 2021-06-03 13:27:26 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 360f4675ffe6ff014f232d130d6da9d2 SHA-1: 035c273aa9db2df6083c139ec580cdfbf51e1236 SHA-256: 7f4c604e9c55c3f33d44263d1cf35d1a108f9756bbf9f7b1b70f532ed6e17804
82 Risk Score

Malware Insights

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

The document displays a fake CAPTCHA to lure the user into clicking an embedded URL, which likely leads to a malicious download. The ML classifier strongly flagged this PDF as malicious, and the presence of multiple URLs associated with game hacks and cheats further supports a phishing or social engineering attack. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9832

Heuristics 4

  • Fake CAPTCHA / human verification prompt high SE_FAKE_CAPTCHA
    Document displays a fake CAPTCHA or human-verification prompt — used to trick users into running commands or pressing keyboard shortcuts
  • 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/robux-link-game-hack
    • http://perpus.poltekeskupang.ac.id/repository/minecraft-xray-hack_GM479516143.pdf
    • http://perpus.poltekeskupang.ac.id//repository/www-free-robux_GM431946152.pdf
    • http://perpus.poltekeskupang.ac.id/repository/free-spins-coin-master-2021-glitch_GM406889139.pdf
    • http://perpus.poltekeskupang.ac.id//repository/cmaster-club-coin-master-hack-tool_GM406889139.pdf
    • http://perpus.poltekeskupang.ac.id//repository/hack-coin-master-for-free_GM406889139.pdf
    • http://perpus.poltekeskupang.ac.id/repository/roblox-sued_GM431946152.pdf
    • http://perpus.poltekeskupang.ac.id//repository/free-spin-coin_GM406889139.pdf
    • http://perpus.poltekeskupang.ac.id//repository/roblox-adopt-me-hack_GM431946152.pdf
    • http://perpus.poltekeskupang.ac.id/repository/minecraft-free-download-iphone_GM479516143.pdf
    • http://perpus.poltekeskupang.ac.id//repository/redeem-roblox-card-free_GM431946152.pdf
    • http://perpus.poltekeskupang.ac.id/repository/pokemon-go-free-gift-box_GM1094591345.pdf
    • http://perpus.poltekeskupang.ac.id/repository/blogspot-coin-master_GM406889139.pdf
    • http://perpus.poltekeskupang.ac.id//repository/roblox-got-talent-piano-hack_GM431946152.pdf
    • http://perpus.poltekeskupang.ac.id/repository/roblox-speed-hack_GM431946152.pdf
    • http://perpus.poltekeskupang.ac.id/repository/rbx-roblox_GM431946152.pdf
    • http://perpus.poltekeskupang.ac.id//repository/best-free-coin-master-spins_GM406889139.pdf
    • http://perpus.poltekeskupang.ac.id/repository/free-robux-codes-not-used_GM431946152.pdf
    • http://perpus.poltekeskupang.ac.id//repository/minecraft-multiplayer-free_GM479516143.pdf
    • http://perpus.poltekeskupang.ac.id/repository/roblox-robux-generator_GM431946152.pdf
    • http://perpus.poltekeskupang.ac.id//repository/inappropriate-roblox_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00005452.bin
ec2ee0d9953eacfdf9067db421a7dd355e94c21c52c4f13c4cd9704353efe14e		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5452 28060 bytes
font_01_sfnt_off0000939f.bin
55cc32ccd4720f2561bfd726f9949d331fd7a3f535a85ffeb1ea678636ae0346		 pdf-font-stream PDF embedded font (sfnt) at offset 0x939F 18140 bytes

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