Malicious PDF — malware analysis report

Static analysis result for SHA-256 6f8d0b0653ca9b10…

MALICIOUS

PDF

34.1 KB Created: 2021-07-05 06:10:32 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: e41781ae5626555dec571044571ab308 SHA-1: ef7868e259f01c31921db0dd863fd3f610b5546b SHA-256: 6f8d0b0653ca9b10e3d2194a3345c28fd0387a8e573a74e5d6218c71bc44377e
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple embedded URLs, with a primary focus on 'game hack' lures. The heuristic 'PDF_GAME_HACK_REDIRECT_LURE' indicates that the document links to a redirector for such content. The ML classifier also flagged this PDF as malicious. The document body text, though partially corrupted, contains references to 'Coin Master Hack' and URLs related to game cheats, reinforcing the lure. No scripts were extracted from this sample, but the embedded URLs are the primary indicators of malicious intent, likely leading to a phishing or malware download site.

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/coin-master-hack-version-33-2-game-hack PDF link annotation
    • http://pustaka.bbppketindan.info//repository/coin-master-hack-pro-gamers-com_GM406889139.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/roblox-animation-maker-free_GM431946152.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/free-robux-no-survey-no-human-verification-2021_GM431946152.pdfIn PDF document text
    • http://pustaka.bbppketindan.info//repository/no-scam-free-robux_GM431946152.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/easy-robux-no-hack_GM431946152.pdfIn PDF document text
    • http://pustaka.bbppketindan.info//repository/coin-blogspot_GM406889139.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/free-roblox-accounts_GM431946152.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/free-roblox-clothes-creator_GM431946152.pdfIn PDF document text
    • http://pustaka.bbppketindan.info//repository/robux-hack-tools_GM431946152.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/how-to-get-free-robux-not-a-scam_GM431946152.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/leviving-hack-roblox_GM431946152.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/roblox-bloxburg-hack_GM431946152.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/com-roblox_GM431946152.pdfIn PDF document text
    • http://pustaka.bbppketindan.info//repository/how-to-get-free-robux-in-2021_GM431946152.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/awesome-free-stuff-on-roblox_GM431946152.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/how-to-get-robux_GM431946152.pdfIn PDF document text
    • http://pustaka.bbppketindan.info//repository/free-robux-please_GM431946152.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/google-only-roblox-items-free-2021_GM431946152.pdfIn PDF document text
    • http://pustaka.bbppketindan.info//repository/how-to-get-free-robux-without-downloading-apps-2021_GM431946152.pdfIn PDF document text
    • http://pustaka.bbppketindan.info//repository/coin-master-free-redeem-code_GM406889139.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_off00002ef2.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x2EF2 22728 bytes
SHA-256: 67def445e2fa9c3433355b94a969d4c65cd9f4b57d712cbf00007a413d7d2a47
font_01_sfnt_off000061af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x61AF 18436 bytes
SHA-256: 40d4f265c6f80eacc067217a35f9691239ff8b0750ab836d6fc535a93aeb50a2

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