Malicious PDF — malware analysis report

Static analysis result for SHA-256 89504e6bcbe0c4ba…

MALICIOUS

PDF

44.7 KB Created: 2021-06-10 13:39:58 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 4c750f514f435c689f71b61efad8c671 SHA-1: bc3cfa3accf12a7276fab7addec1a055d37ba653 SHA-256: 89504e6bcbe0c4ba1c3b50dbe5eb60af28303cf28d4e3f221c63b05113700ef9
82 Risk Score

Malware Insights

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

The PDF document contains a fake CAPTCHA lure, aiming to trick the user into downloading a malicious file. The embedded URL and numerous other URLs point to sites offering game hacks, suggesting a social engineering tactic to deliver malware. No scripts were extracted, but the presence of a fake CAPTCHA and external links strongly indicates a malicious intent to deliver a second-stage payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

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.tw/app/431946152/roblox-game-botter-free-game-hack
    • http://www.perpustakaan.baytalhikmah.sch.id//repository/minecraft-hack-ios_GM479516143.pdf
    • http://perpustakaan.baytalhikmah.sch.id/repository/roblox-speed-hack-2021-may_GM431946152.pdf
    • http://www.perpustakaan.baytalhikmah.sch.id/repository/is-roblox-free-on-pc_GM431946152.pdf
    • http://perpustakaan.baytalhikmah.sch.id/repository/free-coins-coin-master-blog_GM406889139.pdf
    • http://perpustakaan.baytalhikmah.sch.id/repository/coin-master-free-spins-link-2021_GM406889139.pdf
    • http://www.perpustakaan.baytalhikmah.sch.id//repository/roblox-phantom-forces-hack_GM431946152.pdf
    • http://www.perpustakaan.baytalhikmah.sch.id//repository/how-to-hack-peoples-roblox-accounts_GM431946152.pdf
    • http://www.perpustakaan.baytalhikmah.sch.id//repository/coin-master-game-2021-free-spin-link_GM406889139.pdf
    • http://www.perpustakaan.baytalhikmah.sch.id/repository/roblox-free-pants-girl_GM431946152.pdf
    • http://www.perpustakaan.baytalhikmah.sch.id//repository/coin-master-free-spin-link-list_GM406889139.pdf
    • http://www.perpustakaan.baytalhikmah.sch.id/repository/escape-room-roblox-cheats-enchanted-forest-secret-password_GM431946152.pdf
    • http://www.perpustakaan.baytalhikmah.sch.id//repository/how-to-change-your-name-in-roblox-for-free_GM431946152.pdf
    • http://www.perpustakaan.baytalhikmah.sch.id/repository/free-robux-hack-us_GM431946152.pdf
    • http://www.perpustakaan.baytalhikmah.sch.id/repository/pubg-uc-live_GM1330123889.pdf
    • http://perpustakaan.baytalhikmah.sch.id/repository/coin-master-website_GM406889139.pdf
    • http://www.perpustakaan.baytalhikmah.sch.id/repository/roblox-free-clear-pants_GM431946152.pdf
    • http://www.perpustakaan.baytalhikmah.sch.id//repository/coin-master-hacks-that-work_GM406889139.pdf
    • http://www.perpustakaan.baytalhikmah.sch.id//repository/coin-master-free-spins-and-coins_GM406889139.pdf
    • http://www.perpustakaan.baytalhikmah.sch.id/repository/how-to-download-minecraft-hacks_GM479516143.pdf
    • http://www.perpustakaan.baytalhikmah.sch.id/repository/how-to-hack-roblox_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off0000514f.bin
00943bf1dd98f5b223825009206e18c20303c04a663827eb313e2d976112374d		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x514F 25072 bytes
font_01_sfnt_off00008b4d.bin
c44de134ecb9945d709171e2eb2665b60ea5d6c61e5d1f5b85771adc474ff4a0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8B4D 18540 bytes

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