Malicious PDF — malware analysis report

Static analysis result for SHA-256 27c861c7d8bd8f6f…

MALICIOUS

PDF

35.4 KB Created: 2021-07-06 02:07:43 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: c3ef589609c14566f725b4fbac771f68 SHA-1: edd9996cf25a2fb5b5f489e90bb769b2c9c144d1 SHA-256: 27c861c7d8bd8f6ff4235d5ba0c2fdfcdbc2d67b2b8c35b25d63f638e9198c55
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links, prominently featuring a lure for 'free spin link in coin master game hack'. The ML classifier strongly flagged this PDF as malicious. The embedded URLs, particularly http://netcdn.tw/app/406889139/free-spin-link-in-coin-master-game-hack, are likely intended to redirect users to a site that hosts malware or facilitates further compromise.

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/free-spin-link-in-coin-master-game-hack PDF link annotation
    • http://library.forda-mof.org/katalog/repository/free-spin-coin-master-2021-link_GM406889139.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/how-many-free-spin-links-is-there-for-coin-master_GM406889139.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/multiple-roblox-download-free_GM431946152.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/pubg-uc-ykleme-kod_GM1330123889.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/free-spin-coin-master-hacktoman_GM406889139.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/free-robux-download_GM431946152.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/minecraft-for-free-games_GM479516143.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/coin-master-hack-2021-download_GM406889139.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/free-robux-that-actually-works-2021_GM431946152.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/coin-master-free-spins-2021_GM406889139.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/coin-master-free-spins-for-today_GM406889139.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/roblox-free-exploits_GM431946152.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/robux-fun-hack_GM431946152.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/free-robux-codes-no-verification-2021_GM431946152.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/coin-master-hack-that-actually-works_GM406889139.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/coin-master-free-spins-link_GM406889139.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/hack-coin-master-no-human-verification_GM406889139.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/free-robux-hack_GM431946152.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/free-executor-roblox_GM431946152.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/free-robux-no-verification-needed_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
stream_002_off00003367.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3367 23424 bytes
SHA-256: a6745e8114546ad98552d74f4f2d589098fc463e4568d9828c914f4a1f34d86c
font_01_sfnt_off000067c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x67C6 18344 bytes
SHA-256: d3e962bcabbb5ef935488ecc7aa9e5e3fb65918ede879eb88a760949ba3de850

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