Malicious PDF — malware analysis report

Static analysis result for SHA-256 3313e7b5fddddd5b…

MALICIOUS

PDF

41.7 KB Created: 2021-05-10 16:05:35 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 583136a136ed3313be3c0eaaef0c208d SHA-1: 987a7b4e7b83c15eee6dfc0e6a26b4d04cf6241a SHA-256: 3313e7b5fddddd5bbecb184958b43d2b4c58628774bb8946b8c3614b7d582278
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains multiple links to external websites that promise game hacks and free currency, such as 'www-roblox-robux-game-hack'. These links are highly indicative of a lure to redirect users to potentially malicious sites for credential harvesting or malware delivery. The ML classifier also strongly flagged this PDF as malicious.

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 https://netcdn.xyz/app/431946152/www-roblox-robux-game-hack PDF link annotation
    • http://katalog.ireyogya.org/repository/free-400-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://katalog.ireyogya.org/repository/get-free-robux-gg_GM431946152.pdfIn PDF document text
    • http://katalog.ireyogya.org/repository/coin-master-game-hack-app-download_GM406889139.pdfIn PDF document text
    • http://katalog.ireyogya.org/repository/free-robux-offers_GM431946152.pdfIn PDF document text
    • http://katalog.ireyogya.org/repository/free-avatar-roblox_GM431946152.pdfIn PDF document text
    • http://katalog.ireyogya.org/repository/moonactive-free-spins-2021_GM406889139.pdfIn PDF document text
    • http://katalog.ireyogya.org/repository/coin-master-connection-lost-hack_GM406889139.pdfIn PDF document text
    • http://katalog.ireyogya.org/repository/free-robux-no-verification-or-survey-2021_GM431946152.pdfIn PDF document text
    • http://katalog.ireyogya.org/repository/coin-master-free-spins-link_GM406889139.pdfIn PDF document text
    • http://katalog.ireyogya.org/repository/robux-only_GM431946152.pdfIn PDF document text
    • http://katalog.ireyogya.org/repository/coin-master-hack-tool-exe_GM406889139.pdfIn PDF document text
    • http://katalog.ireyogya.org/repository/coin-master-hack-spins-ios_GM406889139.pdfIn PDF document text
    • http://katalog.ireyogya.org/repository/facebook-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://katalog.ireyogya.org/repository/www-claim-gg-to-earn-free-robux_GM431946152.pdfIn PDF document text
    • http://katalog.ireyogya.org/repository/coin-master-free-raid-link_GM406889139.pdfIn PDF document text
    • http://katalog.ireyogya.org/repository/coin-master-update-2021_GM406889139.pdfIn PDF document text
    • http://katalog.ireyogya.org/repository/roblox-robux_GM431946152.pdfIn PDF document text
    • http://katalog.ireyogya.org/repository/coin-master-free-spin-link-twitter_GM406889139.pdfIn PDF document text
    • http://katalog.ireyogya.org/repository/how-to-hack-coin-master-using-es-file_GM406889139.pdfIn PDF document text
    • http://katalog.ireyogya.org/repository/roblox-free-skin_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_003_off0000492c.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x492C 24052 bytes
SHA-256: 2bb42b6fbe3eaba399cb3a314bab5343e8446cfc6a43d3288b0aa547d7773ecf
font_01_sfnt_off00008054.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8054 18284 bytes
SHA-256: 78b116fa1ee868f0b0d7434088deeaef50c2dd7920df139fcc6e1eb836a1517c

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