Malicious PDF — malware analysis report

Static analysis result for SHA-256 5ab14c60b0b9eb9e…

MALICIOUS

PDF

35.5 KB Created: 2021-06-24 23:35:10 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 9a90ac366f502919e1bcb8ba199b0e15 SHA-1: 298703808f56607dd36ca915fafaa556c00bffbe SHA-256: 5ab14c60b0b9eb9e84cccd9e2e92128fc0d0f411d366c55ce3a686a9ba41cba4
122 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF document employs a common lure, presenting itself as a 'free generator' or 'game hack' to entice users to click on embedded links. The heuristic 'SE_CLIPBOARD_COMMAND_LURE' suggests the document may also instruct users to execute commands, indicating a potential attempt to exploit vulnerabilities or trick users into running malicious code. The ML classifier strongly flags this PDF as malicious, supporting the observed malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 5

  • PDF links to a 'free generator / game hack' redirector high PDF_GAME_HACK_REDIRECT_LURE
    PDF's clickable action targets a redirector of the form /app/<id>/<slug>-game-hack — the landing-page shape of a large SEO 'free spins / generator / game hack' lure family that funnels victims through rotating disposable hosts to a malware/scam payload. The multi-link variants also trip ML/link-farm rules; this catches the single-link variants that otherwise score clean.
  • Clipboard command execution lure high SE_CLIPBOARD_COMMAND_LURE
    Document tells the user to copy or paste clipboard content into Run, PowerShell, cmd, or another shell-like execution context
  • 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.co/app/431946152/hex-number-free-robux-game-hack PDF link annotation
    • https://www.e-library.smpn09.semarangkota.go.id/repository/minecraft-free_GM479516143.pdfIn PDF document text
    • https://www.e-library.smpn09.semarangkota.go.id/repository/is-roblox-free-modelling-bad_GM431946152.pdfIn PDF document text
    • https://www.e-library.smpn09.semarangkota.go.id/repository/join-the-group-for-free-robux_GM431946152.pdfIn PDF document text
    • https://www.e-library.smpn09.semarangkota.go.id/repository/free-robux-codes-generator_GM431946152.pdfIn PDF document text
    • https://www.e-library.smpn09.semarangkota.go.id/repository/ccv5-roblox-hacks_GM431946152.pdfIn PDF document text
    • https://www.e-library.smpn09.semarangkota.go.id/repository/free-robux-hack-2021-no-verification_GM431946152.pdfIn PDF document text
    • https://www.e-library.smpn09.semarangkota.go.id/repository/free-package-com-roblox_GM431946152.pdfIn PDF document text
    • https://www.e-library.smpn09.semarangkota.go.id/repository/how-to-hack-and-get-robux_GM431946152.pdfIn PDF document text
    • https://www.e-library.smpn09.semarangkota.go.id/repository/arcade-tycoon-roblox-hack_GM431946152.pdfIn PDF document text
    • https://www.e-library.smpn09.semarangkota.go.id/repository/funbloxxyz-free-robux_GM431946152.pdfIn PDF document text
    • https://www.e-library.smpn09.semarangkota.go.id/repository/cheating-explioting-in-the-condo-roblox_GM431946152.pdfIn PDF document text
    • https://www.e-library.smpn09.semarangkota.go.id/repository/roblox-build-a-boat-for-treasure-free-gold_GM431946152.pdfIn PDF document text
    • https://www.e-library.smpn09.semarangkota.go.id/repository/roblox-avatar-for-hackers_GM431946152.pdfIn PDF document text
    • https://www.e-library.smpn09.semarangkota.go.id/repository/how-to-get-free-robux-easy_GM431946152.pdfIn PDF document text
    • https://www.e-library.smpn09.semarangkota.go.id/repository/free-egg-roblox-eggcellent_GM431946152.pdfIn PDF document text
    • https://www.e-library.smpn09.semarangkota.go.id/repository/free-robux-no-verification-at-all_GM431946152.pdfIn PDF document text
    • https://www.e-library.smpn09.semarangkota.go.id/repository/comment-hacker-pour-avoir-des-robux_GM431946152.pdfIn PDF document text
    • https://www.e-library.smpn09.semarangkota.go.id/repository/free-robux-and-roblox_GM431946152.pdfIn PDF document text
    • https://www.e-library.smpn09.semarangkota.go.id/repository/robux-hack-tools_GM431946152.pdfIn PDF document text
    • https://www.e-library.smpn09.semarangkota.go.id/repository/how-to-get-minecraft-for-free-on-ps4_GM479516143.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_002_off00003296.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3296 23012 bytes
SHA-256: 46b200265ceff372bdd8304e1648f329c61d88f625f1f539240220631366d552
font_01_sfnt_off00006630.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6630 18976 bytes
SHA-256: 161b0c08df809bfc911ba54acc7d3274d6589ff64dab9c8d26b8d5e2d75eb612

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