Malicious PDF — malware analysis report

Static analysis result for SHA-256 cf909cc98164baf0…

MALICIOUS

PDF

34.6 KB Created: 2021-07-03 17:46:02 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 11e835f81ad1606e91fd4c929c6c7fb6 SHA-1: fa69c368c1d080b79bd071d9b013267c43ccc1f9 SHA-256: cf909cc98164baf090c9d04b332238cd7eaeb37bf4ea58e03ccdd1b7fe43b679
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to external websites that promise game hacks and free in-game currency, such as Coin Master spins and Roblox Robux. The heuristic 'PDF_GAME_HACK_REDIRECT_LURE' and the embedded URLs strongly indicate a social engineering tactic to redirect users to potentially malicious sites. No scripts were extracted, but the overall pattern suggests a phishing or scam attempt.

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-free-spins-hack-but-no-surveys-game-hack PDF link annotation
    • http://cintabaca.org/katalog/repository/is-roblox-free-on-ps3_GM431946152.pdfIn PDF document text
    • http://cintabaca.org/katalog/repository/how-to-get-free-golden-card-in-coin-master_GM406889139.pdfIn PDF document text
    • http://cintabaca.org/katalog//repository/coin-master-free-spin-facebook-link_GM406889139.pdfIn PDF document text
    • http://cintabaca.org/katalog//repository/free-coins-app-for-coin-master_GM406889139.pdfIn PDF document text
    • http://cintabaca.org/katalog//repository/pokemon-go-free-zoom_GM1094591345.pdfIn PDF document text
    • http://cintabaca.org/katalog/repository/how-to-hack-someone-on-roblox-for-robux_GM431946152.pdfIn PDF document text
    • http://cintabaca.org/katalog/repository/hack-with-player-command-roblox_GM431946152.pdfIn PDF document text
    • http://cintabaca.org/katalog/repository/free-clotrhes-roblox_GM431946152.pdfIn PDF document text
    • http://cintabaca.org/katalog/repository/roblox40com-robux_GM431946152.pdfIn PDF document text
    • http://cintabaca.org/katalog/repository/how-to-get-free-robux-no-verify_GM431946152.pdfIn PDF document text
    • http://cintabaca.org/katalog/repository/how-to-get-minecraft-on-chromebook-for-free_GM479516143.pdfIn PDF document text
    • http://cintabaca.org/katalog/repository/free-robux-generator-no-surveys-password_GM431946152.pdfIn PDF document text
    • http://cintabaca.org/katalog/repository/free-minecraft-skins_GM479516143.pdfIn PDF document text
    • http://cintabaca.org/katalog//repository/how-to-hack-golden-card-in-coin-master_GM406889139.pdfIn PDF document text
    • http://cintabaca.org/katalog/repository/roblox-hack-proxo-smasher_GM431946152.pdfIn PDF document text
    • http://cintabaca.org/katalog/repository/coin-master-hack-2021-without-human-verification_GM406889139.pdfIn PDF document text
    • http://cintabaca.org/katalog//repository/roblox-hack-app_GM431946152.pdfIn PDF document text
    • http://cintabaca.org/katalog/repository/free-roblox-accounts-whit-gamepassed_GM431946152.pdfIn PDF document text
    • http://cintabaca.org/katalog/repository/free-coin-master-gifts_GM406889139.pdfIn PDF document text
    • http://cintabaca.org/katalog/repository/what-is-free-roblox-generator_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_off0000305a.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x305A 22500 bytes
SHA-256: b692f014f821adbd1a2e3938d7beb5ca71df724c77d922f28c9f22e08ebb16b7
font_01_sfnt_off00006276.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6276 18992 bytes
SHA-256: 97804845bf467d2aeff7c85d47b4467823aac43885222e40ee61a94876ec16b2

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