Malicious PDF — malware analysis report

Static analysis result for SHA-256 ec8303ab01300e88…

MALICIOUS

PDF

48.1 KB Created: 2021-06-03 09:23:08 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 8432366f5f9c56dfe822749dfd876292 SHA-1: 9194b9de3e7389ed908097b1e0350b40229d4bfa SHA-256: ec8303ab01300e88ecb247c45c5ed05f8ae551169190844d605e45d1f178019b
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a lure related to 'free Roblox clothes' and links to external URLs, indicating a likely attempt to trick users into downloading malicious content or visiting a phishing site. The ML classifier also flagged this PDF as malicious. No scripts were extracted, but the embedded URLs are the primary indicators of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9796

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.online/app/431946152/free-roblox-clothes-for-your-avatar-game-hack PDF link annotation
    • http://opac.kolejkrim.edu.my/repository/robux-game_GM431946152.pdfIn PDF document text
    • http://opac.kolejkrim.edu.my/repository/how-to-get-free-robux-without-human-verification-2021_GM431946152.pdfIn PDF document text
    • http://opac.kolejkrim.edu.my/repository/free-robux-easy-and-fast_GM431946152.pdfIn PDF document text
    • http://opac.kolejkrim.edu.my/repository/free-spin-coin-master-instagram_GM406889139.pdfIn PDF document text
    • http://opac.kolejkrim.edu.my/repository/coin-master-spin-and-coins-free_GM406889139.pdfIn PDF document text
    • http://opac.kolejkrim.edu.my/repository/get-free-robux-gg_GM431946152.pdfIn PDF document text
    • http://opac.kolejkrim.edu.my/repository/free-old-roblox-accounts_GM431946152.pdfIn PDF document text
    • http://opac.kolejkrim.edu.my/repository/best-minecraft-hacks_GM479516143.pdfIn PDF document text
    • http://opac.kolejkrim.edu.my/repository/free-spins-coin-master-links_GM406889139.pdfIn PDF document text
    • http://opac.kolejkrim.edu.my/repository/free-robux-generator-2021-no-survey_GM431946152.pdfIn PDF document text
    • http://opac.kolejkrim.edu.my/repository/is-minecraft-java-free_GM479516143.pdfIn PDF document text
    • http://opac.kolejkrim.edu.my/repository/coin-master-hack-2021-app_GM406889139.pdfIn PDF document text
    • http://opac.kolejkrim.edu.my/repository/free-spins-coin-master-2021-hack_GM406889139.pdfIn PDF document text
    • http://opac.kolejkrim.edu.my/repository/is-roblox-free-on-nintendo-switch_GM431946152.pdfIn PDF document text
    • http://opac.kolejkrim.edu.my/repository/coin-master-unlimited-spin-hack_GM406889139.pdfIn PDF document text
    • http://opac.kolejkrim.edu.my/repository/coin-master-fan-page-facebook_GM406889139.pdfIn PDF document text
    • http://opac.kolejkrim.edu.my/repository/websites-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://opac.kolejkrim.edu.my/repository/roblox-hack-2021_GM431946152.pdfIn PDF document text
    • http://opac.kolejkrim.edu.my/repository/coin-master-daily-free-spins_GM406889139.pdfIn PDF document text
    • http://opac.kolejkrim.edu.my/repository/how-to-get-free-robux-no-human-verification_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off0000509f.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x509F 26704 bytes
SHA-256: 8127b5c60fb1953bf66f71f4ad9ce6d866dff948c883c701ad2aa49a0a65152d
font_01_sfnt_off00008ded.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8DED 2872 bytes
SHA-256: 471b34484c3bee8d5bebbf3396bad215506385dbde547a2422db70e8efc075b4
font_02_sfnt_off000097a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x97A8 18860 bytes
SHA-256: 1761c8fbdaafa52a42c2d9c8dd0fbea25e5bec314d4deea8139da4bd569234ce

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