Malicious PDF — malware analysis report

Static analysis result for SHA-256 923c59a7edf24216…

MALICIOUS

PDF

34.2 KB Created: 2021-07-05 14:35:26 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 30b3cf7f95bbfa158a67a657f0abb4e0 SHA-1: 197d8647dbc4506188c32b011bd95298a668475e SHA-256: 923c59a7edf242165b423b9e8a864205776327dbd10a760d9faedcf2d47d025d
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a lure for 'free spins' and 'game hacks', directly linking to a URL that appears to be a redirector for such scams. The ML classifier strongly flagged this PDF as malicious, and the presence of embedded URLs further supports a phishing or scamming attempt. No scripts were extracted, but the primary attack vector is the deceptive link.

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/claim-coin-master-free-spins-game-hack PDF link annotation
    • https://perpustakaan.stami.ac.id/repository/rbxoffer-com-free-robux_GM431946152.pdfIn PDF document text
    • https://perpustakaan.stami.ac.id//repository/minecraft-free-play-now_GM479516143.pdfIn PDF document text
    • https://perpustakaan.stami.ac.id//repository/how-to-get-free-robux-without-human-verification_GM431946152.pdfIn PDF document text
    • https://perpustakaan.stami.ac.id/repository/roblox-phantom-forces-hack-aimbot_GM431946152.pdfIn PDF document text
    • https://perpustakaan.stami.ac.id/repository/coin-master-free-spins_GM406889139.pdfIn PDF document text
    • https://perpustakaan.stami.ac.id//repository/minecraft-pvp-hacks_GM479516143.pdfIn PDF document text
    • https://perpustakaan.stami.ac.id/repository/coin-master-free-spins-link-blogspot_GM406889139.pdfIn PDF document text
    • https://perpustakaan.stami.ac.id/repository/minecraft-images-free_GM479516143.pdfIn PDF document text
    • https://perpustakaan.stami.ac.id//repository/minecraft-free-download-mac_GM479516143.pdfIn PDF document text
    • https://perpustakaan.stami.ac.id//repository/how-to-earn-free-robux_GM431946152.pdfIn PDF document text
    • https://perpustakaan.stami.ac.id/repository/redeem-roblox-card-free_GM431946152.pdfIn PDF document text
    • https://perpustakaan.stami.ac.id//repository/minecraft-apk-free-download_GM479516143.pdfIn PDF document text
    • https://perpustakaan.stami.ac.id/repository/easypoints-gg-roblox_GM431946152.pdfIn PDF document text
    • https://perpustakaan.stami.ac.id/repository/coin-master-free-chip_GM406889139.pdfIn PDF document text
    • https://perpustakaan.stami.ac.id//repository/free-coin-master-cards_GM406889139.pdfIn PDF document text
    • https://perpustakaan.stami.ac.id//repository/robux-xyz_GM431946152.pdfIn PDF document text
    • https://perpustakaan.stami.ac.id/repository/rbx-sites_GM431946152.pdfIn PDF document text
    • https://perpustakaan.stami.ac.id//repository/coin-master-free-spin-link-app_GM406889139.pdfIn PDF document text
    • https://perpustakaan.stami.ac.id//repository/coin-master-daily-free-spins_GM406889139.pdfIn PDF document text
    • https://perpustakaan.stami.ac.id//repository/coin-master-hack-blog_GM406889139.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_off00002fc8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2FC8 22820 bytes
SHA-256: e9ea8349c2c305620e3c7278e3572d9477a1c825336fe189cc227a77fb917bbb
font_01_sfnt_off00006267.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6267 18508 bytes
SHA-256: 987175f1bef36cd1a6ae0c6c9abaf20945c3bf3d09c946a67552c00f8a973d90

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