Malicious PDF — malware analysis report

Static analysis result for SHA-256 23c3c8e2bcdcfa64…

MALICIOUS

PDF

34.3 KB Created: 2021-07-06 11:54:25 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-17
MD5: fb96a7b5ff082b51c5cdb9faf7f66299 SHA-1: 97210d7943b18c86a6dc77de2ba1f87afc72dc57 SHA-256: 23c3c8e2bcdcfa6426b133e24f118654df8a3dd8ace120095a937c50700a035e
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, indicating a phishing or scam attempt. The ML classifier strongly flagged this PDF as malicious, and the presence of embedded URLs further supports this assessment. No scripts were extracted, but the primary attack vector appears to be social engineering via deceptive links.

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/431946152/roblox-guess-that-character-free-robux-game-hack PDF link annotation
    • http://lib.uho.ac.id/library/repository/roblox-gae-free_GM431946152.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/free-robux-only-1-step_GM431946152.pdfIn PDF document text
    • http://lib.uho.ac.id/library//repository/how-do-you-hack-roblox_GM431946152.pdfIn PDF document text
    • http://lib.uho.ac.id/library//repository/dominus-roblox-free_GM431946152.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/coin-master-free-in-app-purchases_GM406889139.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/coin-master-free-coins-and-spins-hack_GM406889139.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/how-to-make-your-own-minecraft-server-for-free_GM479516143.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/minecraft-ps4-free_GM479516143.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/krnl-download_GM431946152.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/try-minecraft-free_GM479516143.pdfIn PDF document text
    • http://lib.uho.ac.id/library//repository/how-do-we-get-free-robux_GM431946152.pdfIn PDF document text
    • http://lib.uho.ac.id/library//repository/get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.uho.ac.id/library//repository/free-robux-hacker-us_GM431946152.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/dupe-tool-hack-roblox_GM431946152.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/roblox-script-hack_GM431946152.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/comment-cre-un-free-admin-sur-roblox_GM431946152.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/minecraft-hack-ios_GM479516143.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/coin-master-mod-version-free-download_GM406889139.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/how-do-i-get-robux_GM431946152.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/free-minecraft-windows-10-account_GM479516143.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_off00003006.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3006 22332 bytes
SHA-256: 6506127c222c630f8c831c2a98f4924f954047bf815e4572e62c9a5410f2b3cd
font_01_sfnt_off000061bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x61BF 18876 bytes
SHA-256: 6732e6bca81b877d0f04ffe4f2a01de88e0e866ab1fce78b0b9957c51b975639

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