Malicious PDF — malware analysis report

Static analysis result for SHA-256 fc8bfd9c08511f71…

MALICIOUS

PDF

33.7 KB Created: 2021-07-04 13:02:00 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 007d0c218406b4a91875ac4b0fe0d423 SHA-1: 7ffc510c1ce67b28fa8df7bddb5c229d6b7d720a SHA-256: fc8bfd9c08511f71feb89d66acbcdc4d06e896250639c4c41bfcbdf592f34b13
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. The file routes users through malicious redirector infrastructure and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

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-today-39-game-hack PDF link annotation
    • http://perpus.fisip.unnur.ac.id/repository/how-do-people-give-us-free-robux_GM431946152.pdfIn PDF document text
    • http://perpus.fisip.unnur.ac.id/repository/how-to-get-free-builders-club-and-robux_GM431946152.pdfIn PDF document text
    • http://perpus.fisip.unnur.ac.id/repository/get-free-roblox_GM431946152.pdfIn PDF document text
    • http://perpus.fisip.unnur.ac.id/repository/coin-master-free-spins-link-2021_GM406889139.pdfIn PDF document text
    • http://perpus.fisip.unnur.ac.id/repository/how-to-get-more-robux_GM431946152.pdfIn PDF document text
    • http://perpus.fisip.unnur.ac.id/repository/free-yellow-roblox_GM431946152.pdfIn PDF document text
    • http://perpus.fisip.unnur.ac.id/repository/minecraft-hack-app_GM479516143.pdfIn PDF document text
    • http://perpus.fisip.unnur.ac.id/repository/is-hacking-on-roblox-illegal_GM431946152.pdfIn PDF document text
    • http://perpus.fisip.unnur.ac.id/repository/free-robux-generator-for-roblox-2021_GM431946152.pdfIn PDF document text
    • http://perpus.fisip.unnur.ac.id/repository/how-to-be-a-plus-member-on-roblox-for-free_GM431946152.pdfIn PDF document text
    • http://perpus.fisip.unnur.ac.id/repository/how-to-get-wings-fo-free-roblox_GM431946152.pdfIn PDF document text
    • http://perpus.fisip.unnur.ac.id/repository/spin-free-coin-master_GM406889139.pdfIn PDF document text
    • http://perpus.fisip.unnur.ac.id/repository/free-working-promocodes-for-roblox_GM431946152.pdfIn PDF document text
    • http://perpus.fisip.unnur.ac.id/repository/dayz-roblox-cheat-codes_GM431946152.pdfIn PDF document text
    • http://perpus.fisip.unnur.ac.id/repository/roblox-cheat-engine-download-2021_GM431946152.pdfIn PDF document text
    • http://perpus.fisip.unnur.ac.id/repository/roblox-hack-download-2021_GM431946152.pdfIn PDF document text
    • http://perpus.fisip.unnur.ac.id/repository/hacker-told-me-how-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://perpus.fisip.unnur.ac.id/repository/coin-master-hack-reddit_GM406889139.pdfIn PDF document text
    • http://perpus.fisip.unnur.ac.id/repository/hack-xp-net-coin-master_GM406889139.pdfIn PDF document text
    • http://perpus.fisip.unnur.ac.id/repository/enter-thsi-pin-to-get-free-robux_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
font_00_sfnt_off00002c74.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2C74 22604 bytes
SHA-256: a6c6f42ca38aaa448ec775f92ab63a8efc017969151e141fd589b1f3a5a40d77
font_01_sfnt_off00005eea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5EEA 18868 bytes
SHA-256: 050709e5ecaf41550c37b5fd248c11b6ad141ed5a182a1fcff42a9cf14e70b13

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