Malicious PDF — malware analysis report

Static analysis result for SHA-256 de229ceca93fc481…

MALICIOUS

PDF

35.8 KB Created: 2021-07-05 18:23:13 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-07
MD5: aa17f118c9f5a89972e0f2f75f645749 SHA-1: 81ceb1c67e6a2e99e803d79ba63f155e63b60fcf SHA-256: de229ceca93fc481543af9a284afb635e9314e65e63784b3150ef23653bb36ab
162 Risk Score

Malware Insights

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

The PDF contains numerous links to websites promising game hacks and free currency, indicating a lure for users to visit potentially malicious sites. The presence of a 'clipboard command execution lure' heuristic suggests the document may instruct users to copy and paste commands, a common technique for executing malicious payloads. The ML classifier strongly flags this PDF as malicious, supporting the overall assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 6

  • 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
  • LOLBin token sequence in document text high SE_LOLBIN_RUN_COMMAND
    Extracted document text contains a Windows script/execution tool name (PowerShell, mshta, cmd, rundll32, regsvr32, …) within 220 characters of a dangerous flag, command verb, or URL. This is a visible 'run this' instruction in HTML/PDF/RTF lure bodies, or — in macro-laden Office files — the macro's own string-pool entries appearing adjacent in extracted text.
  • 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/406889139/coinmasterfreespinlink-game-hack PDF link annotation
    • http://perpustakaan.bundadelimalampung.ac.id/repository/roblox-com-hack_GM431946152.pdfIn PDF document text
    • http://perpustakaan.bundadelimalampung.ac.id/repository/free-robux-no-human-verification-or-survey-2021_GM431946152.pdfIn PDF document text
    • http://perpustakaan.bundadelimalampung.ac.id/repository/free-spins-coin-master-links-thursday-november-28-2021_GM406889139.pdfIn PDF document text
    • http://perpustakaan.bundadelimalampung.ac.id/repository/roblox-gruns-r15-script-hack_GM431946152.pdfIn PDF document text
    • http://perpustakaan.bundadelimalampung.ac.id/repository/hack-coin-master-android-2021_GM406889139.pdfIn PDF document text
    • http://perpustakaan.bundadelimalampung.ac.id/repository/free-spins-for-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://perpustakaan.bundadelimalampung.ac.id/repository/android-hack-para-tener-robux-en-roblox_GM431946152.pdfIn PDF document text
    • http://perpustakaan.bundadelimalampung.ac.id/repository/can-i-use-free-models-on-my-roblox-game_GM431946152.pdfIn PDF document text
    • http://perpustakaan.bundadelimalampung.ac.id/repository/coin-master-hack-apk-app_GM406889139.pdfIn PDF document text
    • http://perpustakaan.bundadelimalampung.ac.id/repository/como-hackear-cuentas-de-roblox-con-un-programa_GM431946152.pdfIn PDF document text
    • http://perpustakaan.bundadelimalampung.ac.id/repository/free-star-codes-roblox_GM431946152.pdfIn PDF document text
    • http://perpustakaan.bundadelimalampung.ac.id/repository/add-free-robux-pastebin_GM431946152.pdfIn PDF document text
    • http://perpustakaan.bundadelimalampung.ac.id/repository/roblox-robux-hack-2021-download_GM431946152.pdfIn PDF document text
    • http://perpustakaan.bundadelimalampung.ac.id/repository/hacks-for-free-animations-roblox_GM431946152.pdfIn PDF document text
    • http://perpustakaan.bundadelimalampung.ac.id/repository/free-robux-cmd_GM431946152.pdfIn PDF document text
    • http://perpustakaan.bundadelimalampung.ac.id/repository/roblox-free-daily-robux_GM431946152.pdfIn PDF document text
    • http://perpustakaan.bundadelimalampung.ac.id/repository/bloxpage-free-robux_GM431946152.pdfIn macro / runtime command snippet
    • http://perpustakaan.bundadelimalampung.ac.id/repository/coin-master-heaven-daily-free-spins-and-coins-links_GM406889139.pdfIn PDF document text
    • http://perpustakaan.bundadelimalampung.ac.id/repository/coin-master-daily-bonus_GM406889139.pdfIn PDF document text
    • http://perpustakaan.bundadelimalampung.ac.id/repository/roblox-apk-hack-2021_GM431946152.pdfIn PDF document text
    • http://perpustakaan.bundadelimalampung.aIn macro / runtime command snippet
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00003506.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3506 22992 bytes
SHA-256: 34b1052b020ab7e0b813b7e83efd05b7d4c589812bac4e8238ec33bf0532e43f
font_01_sfnt_off000068d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x68D4 18516 bytes
SHA-256: a000f6d0810836f211bd69ad4954bd13017d955b6cad91c28efc413f8e97b1ec

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