Malicious PDF — malware analysis report

Static analysis result for SHA-256 1ac680bb21359ab3…

MALICIOUS

PDF

36.0 KB Created: 2021-07-09 17:04:54 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 46b4d52f59a1b5472b7f60aeaec50a63 SHA-1: da1bf2f736194e5515a211da1ea7fde12dcf159b SHA-256: 1ac680bb21359ab371ebc0bce2e238dd79bb93da3feeeffafc9bbb9a26aa8e15
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a high-confidence heuristic indicating it links to a game hack redirector, specifically mentioning 'free spins on Coin Master'. The document body also contains the URL http://netcdn.tw/app/406889139/link-for-free-spins-on-coin-master-game-hack, which is likely the initial lure. This suggests the document is designed to trick users into visiting malicious sites, potentially for phishing or to download further malware. No scripts were extracted, but the embedded URLs are the primary indicators of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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/406889139/link-for-free-spins-on-coin-master-game-hack PDF link annotation
    • http://www.inoxograde.hr/files/roblox-da-hood-hack-pastebin_GM431946152.pdfIn PDF document text
    • http://www.inoxograde.hr/files/free-500-robux-quiz_GM431946152.pdfIn PDF document text
    • http://www.inoxograde.hr/files/free-robux-quiz_GM431946152.pdfIn PDF document text
    • http://www.inoxograde.hr/files/google-how-can-you-get-free-robux_GM431946152.pdfIn PDF document text
    • http://www.inoxograde.hr/files/how-to-get-robux-on-roblox-for-free-2021_GM431946152.pdfIn PDF document text
    • http://www.inoxograde.hr/files/hack-coin-master-android-2021_GM406889139.pdfIn PDF document text
    • http://www.inoxograde.hr/files/coin-master-hack-tool-exe_GM406889139.pdfIn PDF document text
    • http://www.inoxograde.hr/files/free-roblox-accounts-dantdm_GM431946152.pdfIn PDF document text
    • http://www.inoxograde.hr/files/how-to-get-free-robux-and-bc_GM431946152.pdfIn PDF document text
    • http://www.inoxograde.hr/files/free-game-unlock-roblox_GM431946152.pdfIn PDF document text
    • http://www.inoxograde.hr/files/free-robux-generator-2021-no-survey_GM431946152.pdfIn PDF document text
    • http://www.inoxograde.hr/files/how-to-get-free-gamepasses-in-roblox_GM431946152.pdfIn PDF document text
    • http://www.inoxograde.hr/files/free-minecraft-skins-java_GM479516143.pdfIn PDF document text
    • http://www.inoxograde.hr/files/free-minecraft-games-for-kids_GM479516143.pdfIn PDF document text
    • http://www.inoxograde.hr/files/robux-generator-free-no-human-verification_GM431946152.pdfIn PDF document text
    • http://www.inoxograde.hr/files/roblox-shirt-template-free-to-use_GM431946152.pdfIn PDF document text
    • http://www.inoxograde.hr/files/coin-master-hack-2021-apk_GM406889139.pdfIn PDF document text
    • http://www.inoxograde.hr/files/how-to-hack-work-at-a-pizza-place-roblox_GM431946152.pdfIn PDF document text
    • http://www.inoxograde.hr/files/easy-robux-hack-today_GM431946152.pdfIn PDF document text
    • http://www.inoxograde.hr/files/can-i-have-robux_GM431946152.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_off00003355.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3355 24096 bytes
SHA-256: 17495f046efbe07abce1399800fa8421f40c1e66f3f4e96bf6c012c02dc7467f
font_01_sfnt_off00006a0d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6A0D 18344 bytes
SHA-256: f56b0ea85f0f4ceaa4b3226630b5e27c33b435ed9466ab3582cda34df5208c0a

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