Malicious PDF — malware analysis report

Static analysis result for SHA-256 27592799a3bbdbd2…

MALICIOUS

PDF

44.4 KB Created: 2021-05-11 14:09:08 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 8e17cd71d49bcabdd261627677febdfe SHA-1: fee67777792313dd396a173b929e5ef95af19cd0 SHA-256: 27592799a3bbdbd21e59e31ad41e2a078f103841ac7b2600f88bce93210616df
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a lure for a game hack, directing users to a malicious URL. The ML classifier also flagged this PDF as malicious. While no scripts were explicitly extracted, the presence of embedded URLs and the nature of the lure suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9696

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 https://netcdn.xyz/app/406889139/hack-coin-master-for-android-game-hack PDF link annotation
    • http://en.furuise.com/Public/upload/editorfiles/coin-master-hack-no-human-verification-2021_GM406889139.pdfIn PDF document text
    • http://en.furuise.com/Public/upload/editorfiles/coin-master-spin-hack-trick_GM406889139.pdfIn PDF document text
    • http://en.furuise.com/Public/upload/editorfiles/roblox-army-free-robux_GM431946152.pdfIn PDF document text
    • http://en.furuise.com/Public/upload/editorfiles/coin-master-hack-version-download-2021-android_GM406889139.pdfIn PDF document text
    • http://en.furuise.com/Public/upload/editorfiles/coin-master-free-spins-instagram_GM406889139.pdfIn PDF document text
    • http://en.furuise.com/Public/upload/editorfiles/coin-master-hack-software_GM406889139.pdfIn PDF document text
    • http://en.furuise.com/Public/upload/editorfiles/free-coins-and-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://en.furuise.com/Public/upload/editorfiles/coin-master-hack-tool-without-verification_GM406889139.pdfIn PDF document text
    • http://en.furuise.com/Public/upload/editorfiles/coin-master-hack-no-verify_GM406889139.pdfIn PDF document text
    • http://en.furuise.com/Public/upload/editorfiles/roblox-gift-card-for-free_GM431946152.pdfIn PDF document text
    • http://en.furuise.com/Public/upload/editorfiles/coin-master-free-cards-link_GM406889139.pdfIn PDF document text
    • http://en.furuise.com/Public/upload/editorfiles/coin-master-new-cards-hack_GM406889139.pdfIn PDF document text
    • http://en.furuise.com/Public/upload/editorfiles/coin-master-hack-ios-no-jailbreak_GM406889139.pdfIn PDF document text
    • http://en.furuise.com/Public/upload/editorfiles/minecraft-mods-download-free_GM479516143.pdfIn PDF document text
    • http://en.furuise.com/Public/upload/editorfiles/toolbox-for-mcpe_GM479516143.pdfIn PDF document text
    • http://en.furuise.com/Public/upload/editorfiles/coin-master-cheat-engine-hack_GM406889139.pdfIn PDF document text
    • http://en.furuise.com/Public/upload/editorfiles/minecraft-jar-free_GM479516143.pdfIn PDF document text
    • http://en.furuise.com/Public/upload/editorfiles/where-can-i-get-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://en.furuise.com/Public/upload/editorfiles/earn-robux-online_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004ba1.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4BA1 24076 bytes
SHA-256: 5b1709629067c975aa189225943aa56f9fdbd7410b3b4b1cf4faf111be8a69a5
font_01_sfnt_off0000822d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x822D 2840 bytes
SHA-256: 3fb127b764b9d10f5525bc4de5ec8316de704409ccb0cf21cff3ad8a30d11676
font_02_sfnt_off00008bdf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8BDF 18056 bytes
SHA-256: c73b8889e83ea4d6a092d9b03df5077e8a4a9cdf5eba30ec15891723340a0869

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