Malicious PDF — malware analysis report

Static analysis result for SHA-256 87932c8276482d41…

MALICIOUS

PDF

35.8 KB Created: 2021-06-17 16:45:09 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 03b3d2190a1ff50818e8e1e34b6ce57d SHA-1: 62a638eca794bca908672ac6525c75459df06582 SHA-256: 87932c8276482d41b233ee29cb04debb90e874d0875e0c722abe5cc71b5111c1
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF document contains multiple links and lures related to game hacks and free currency, specifically for Robux and Coin Master. The heuristic 'PDF_GAME_HACK_REDIRECT_LURE' and the presence of numerous related URLs strongly indicate a social engineering attempt to trick users into visiting malicious sites. The ML classifier also flagged this PDF as malicious with high confidence.

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.co/app/431946152/how-to-get-free-robux-batu-game-hack PDF link annotation
    • http://stmb-multismart.ac.id/perpustakaan/repository/cheat-engine-fonctionne-sur-quel-jeu-roblox_GM431946152.pdfIn PDF document text
    • http://stmb-multismart.ac.id/perpustakaan/repository/coin-master-free-spin-sites_GM406889139.pdfIn PDF document text
    • http://stmb-multismart.ac.id/perpustakaan/repository/free-gold-cards-coin-master_GM406889139.pdfIn PDF document text
    • http://stmb-multismart.ac.id/perpustakaan/repository/robux-hack-free-robux_GM431946152.pdfIn PDF document text
    • http://stmb-multismart.ac.id/perpustakaan/repository/minecraft-education-edition-free-download_GM479516143.pdfIn PDF document text
    • http://stmb-multismart.ac.id/perpustakaan/repository/how-to-hack-an-roblox-account-2021-november_GM431946152.pdfIn PDF document text
    • http://stmb-multismart.ac.id/perpustakaan/repository/free-robux-promo-code-generator-2021_GM431946152.pdfIn PDF document text
    • http://stmb-multismart.ac.id/perpustakaan/repository/can-you-get-hacked-on-roblox-when-giving-dis_GM431946152.pdfIn PDF document text
    • http://stmb-multismart.ac.id/perpustakaan/repository/minecraft-pe-server-hosting-free_GM479516143.pdfIn PDF document text
    • http://stmb-multismart.ac.id/perpustakaan/repository/roblox-adopt-me-free_GM431946152.pdfIn PDF document text
    • http://stmb-multismart.ac.id/perpustakaan/repository/coin-master-cheats-2021_GM406889139.pdfIn PDF document text
    • http://stmb-multismart.ac.id/perpustakaan/repository/coin-master-get-free-spins_GM406889139.pdfIn PDF document text
    • http://stmb-multismart.ac.id/perpustakaan/repository/coin-master-hack-tool-v1-9-download-free-pc_GM406889139.pdfIn PDF document text
    • http://stmb-multismart.ac.id/perpustakaan/repository/coin-master-free-coins-2021_GM406889139.pdfIn PDF document text
    • http://stmb-multismart.ac.id/perpustakaan/repository/coin-master-free-coin-and-spin-app_GM406889139.pdfIn PDF document text
    • http://stmb-multismart.ac.id/perpustakaan/repository/best-free-things-on-roblox_GM431946152.pdfIn PDF document text
    • http://stmb-multismart.ac.id/perpustakaan/repository/pokemon-go-for-free_GM1094591345.pdfIn PDF document text
    • http://stmb-multismart.ac.id/perpustakaan/repository/uprobuxcom-free-robux_GM431946152.pdfIn PDF document text
    • http://stmb-multismart.ac.id/perpustakaan/repository/roblox-super-power-training-simulator-hack-script-pastebin_GM431946152.pdfIn PDF document text
    • http://stmb-multismart.ac.id/perpustakaan/repository/minecraft-free-computer-game_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_off000033b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x33B4 22956 bytes
SHA-256: e4d6341dbcc36d00498e5a0b4aa39580efd92c749828057942cf714f0b2f1950
font_01_sfnt_off0000672d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x672D 18984 bytes
SHA-256: e6337992cc9de670ff175350ddecf606520da172201d86f9de5d7cfe8b6fa492

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