Malicious PDF — malware analysis report

Static analysis result for SHA-256 eec6a02a8bb7f626…

MALICIOUS

PDF

33.1 KB Created: 2021-07-20 01:12:29 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 10ae3e30c300f950ee2924e9ba6a16b1 SHA-1: 52a37f9539bfa862aa1259e33e0dad1b125bf2b5 SHA-256: eec6a02a8bb7f6260a0916abb1838d9c31128a2b257b7589213f2e76ec10cd12
82 Risk Score

Malware Insights

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

The PDF document contains a lure for a "free Robux Hack 2021" and includes a prominent link to "http://netcdn.tw/app/431946152/free-robux-hack-2021-game-hack". This URL, combined with the "free generator / game hack" redirector heuristic, strongly suggests a social engineering attempt to trick users into visiting a malicious site. The document's structure and embedded URLs indicate it's designed to exploit interest in popular games for malicious purposes, likely leading to further malware downloads or phishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9900

Heuristics 4

  • 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.
  • 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/431946152/free-robux-hack-2021-game-hack PDF link annotation
    • https://stptonline.badungkab.go.id/assets/CKImages/files/free-minecraft-server-hosting_GM479516143.pdfIn PDF document text
    • https://stptonline.badungkab.go.id/assets/CKImages/files/minecraft-name-tag-hacks_GM479516143.pdfIn PDF document text
    • https://stptonline.badungkab.go.id/assets/CKImages/files/free-robux-no-human-verification-or-survey-or-download_GM431946152.pdfIn PDF document text
    • https://stptonline.badungkab.go.id/assets/CKImages/files/free-tiktok-accounts_GM835599320.pdfIn PDF document text
    • https://stptonline.badungkab.go.id/assets/CKImages/files/how-to-hack-minecraft_GM479516143.pdfIn PDF document text
    • https://stptonline.badungkab.go.id/assets/CKImages/files/hacker-minecraft-song_GM479516143.pdfIn PDF document text
    • https://stptonline.badungkab.go.id/assets/CKImages/files/coin-master-free-spins-link-download_GM406889139.pdfIn PDF document text
    • https://stptonline.badungkab.go.id/assets/CKImages/files/minecraft-free-install_GM479516143.pdfIn PDF document text
    • https://stptonline.badungkab.go.id/assets/CKImages/files/coin-master-free-spin-ml_GM406889139.pdfIn PDF document text
    • https://stptonline.badungkab.go.id/assets/CKImages/files/free-modded-minecraft-server_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
font_00_sfnt_off00002bc7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2BC7 22264 bytes
SHA-256: 315a9724fa0aa913721243b8022a26ccb460f080876799568eb4c8b7b5b661d5
font_01_sfnt_off00005d3a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5D3A 19000 bytes
SHA-256: 50568fc7a8142eae64dd61285c1f793be6192b112dcc14b27c629c71df451875

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