Malicious PDF — malware analysis report

Static analysis result for SHA-256 ea72012fc5c60d57…

MALICIOUS

PDF

33.4 KB Created: 2021-07-19 12:40:55 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: c9e4b702fdede12ca585b99aefa1e5e9 SHA-1: 617cc30059b262ae123ddaab3910ed7732564d6e SHA-256: ea72012fc5c60d578a51dd70514728fafeebb36a38722ed614d61bd201219e6a
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains embedded links and text that lure users with game hack promises, specifically mentioning 'Coin Master Hack'. The primary malicious URL identified is http://netcdn.tw/app/406889139/coin-master-hack-activegamer-game-hack, which is likely used to deliver a secondary payload or redirect to a phishing site. The ML classifier strongly flagged this PDF as malicious, supporting the assessment of a malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

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-activegamer-game-hack PDF link annotation
    • https://www.astrospace.com.tw/upload/files/free-100-robux_GM431946152.pdfIn PDF document text
    • https://www.astrospace.com.tw/upload/files/how-to-get-followers-on-tiktok-for-free_GM835599320.pdfIn PDF document text
    • https://www.astrospace.com.tw/upload/files/free-robux-no-verification_GM431946152.pdfIn PDF document text
    • https://www.astrospace.com.tw/upload/files/free-tiktok-followers-no-human-verification-or-survey_GM835599320.pdfIn PDF document text
    • https://www.astrospace.com.tw/upload/files/free-roblox-accounts-with-robux_GM431946152.pdfIn PDF document text
    • https://www.astrospace.com.tw/upload/files/how-to-get-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • https://www.astrospace.com.tw/upload/files/minecraft-fly-hack_GM479516143.pdfIn PDF document text
    • https://www.astrospace.com.tw/upload/files/is-minecraft-free-on-xbox_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_off00002b4e.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x2B4E 23524 bytes
SHA-256: 0ee637e1814b88d2819b2ed89da261e3e84a667948807da8d3fdadbea1b3613b
font_01_sfnt_off0000607b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x607B 18376 bytes
SHA-256: 7942159ea88d166bbca90a684af9c7642873a6db171e4c543e33bc315b6ed94a

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