Malicious PDF — malware analysis report

Static analysis result for SHA-256 afc74f4ddabc5915…

MALICIOUS

PDF

35.8 KB Created: 2021-07-20 11:46:09 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-17
MD5: ed2dd8253b30b439ced66bd5b14a8ebd SHA-1: 2dfefcba9fa962c1da9ec8a1e0ed2e8d41a96e7c SHA-256: afc74f4ddabc5915e4d815acf0cdf166f4e16fbe08f9bbb085661ea5edd012a5
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a lure for a "Coin Master Hack" and directs users to a suspicious URL, http://netcdn.tw/app/406889139/coin-master-hack-without-verification-game-hack. This URL is flagged as a game hack redirector, indicating a likely attempt to distribute malware or engage in phishing. The presence of numerous other PDF-related URLs suggests a broader campaign or a collection of lures. While no scripts were explicitly extracted, the PDF structure and embedded URLs strongly suggest a malicious intent to exploit user interest in game cheats.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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-without-verification-game-hack PDF link annotation
    • http://hindicenter.com/images/free-minecraft-coloring-pages_GM479516143.pdfIn PDF document text
    • http://hindicenter.com/images/free-100-robux_GM431946152.pdfIn PDF document text
    • http://hindicenter.com/images/get-minecraft-windows-10-free_GM479516143.pdfIn PDF document text
    • http://hindicenter.com/images/roblox-hacked-com-2021_GM431946152.pdfIn PDF document text
    • http://hindicenter.com/images/buy-robux-free_GM431946152.pdfIn PDF document text
    • http://hindicenter.com/images/free-minecraft-capes_GM479516143.pdfIn PDF document text
    • http://hindicenter.com/images/minecraft-realms-free-trial_GM479516143.pdfIn PDF document text
    • http://hindicenter.com/images/how-to-get-free-robux-no-human-verification-2021_GM431946152.pdfIn PDF document text
    • http://hindicenter.com/images/how-do-i-get-free-robux_GM431946152.pdfIn PDF document text
    • http://hindicenter.com/images/minecraft-hack-mod_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
stream_002_off000034c2.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x34C2 23568 bytes
SHA-256: c08f26ce8e5df1e73fccdbc4e24a3af8844d310c3a86820a1bffea2508f23eae
font_01_sfnt_off00006a2a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6A2A 18356 bytes
SHA-256: dc73d1475286564dbbcfd7fe1f785306788ee44bec01666c46f1ad38f7aa2791

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