Malicious PDF — malware analysis report

Static analysis result for SHA-256 903229e1913f0a4d…

MALICIOUS

PDF

34.0 KB Created: 2021-07-05 03:25:49 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: cb107964ef083445364d13bd60b48e9c SHA-1: 5bb3c4eb049bef87b2480a2f76b8b98b8cfe0b10 SHA-256: 903229e1913f0a4d3a1f756a9f7997df216c3758fa34f35f38f631c296e792fa
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links and text referencing game hacks and free generators, specifically for Coin Master and Robux. The primary URL, http://netcdn.tw/app/406889139/coin-master-free-spins-hack-iphone-game-hack, is flagged as a high-severity lure for game hacks. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest an attempt to redirect the user to a malicious site, likely for credential harvesting or malware distribution.

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-hack-iphone-game-hack PDF link annotation
    • https://pn-tapaktuan.go.id/pustaka/repository/get-more-robux_GM431946152.pdfIn PDF document text
    • https://pn-tapaktuan.go.id/pustaka/repository/free-robux-hack-november-2021_GM431946152.pdfIn PDF document text
    • https://pn-tapaktuan.go.id/pustaka/repository/robux-hack-pc-2021_GM431946152.pdfIn PDF document text
    • https://pn-tapaktuan.go.id/pustaka/repository/no-scam-free-robux_GM431946152.pdfIn PDF document text
    • https://pn-tapaktuan.go.id/pustaka/repository/cheat-engine-hack-roblox-accounts_GM431946152.pdfIn PDF document text
    • https://pn-tapaktuan.go.id/pustaka/repository/real-minecraft-for-free_GM479516143.pdfIn PDF document text
    • https://pn-tapaktuan.go.id/pustaka/repository/wwwcoin-master-hack-game-download_GM406889139.pdfIn PDF document text
    • https://pn-tapaktuan.go.id/pustaka/repository/free-robux-generator-2021-no-download_GM431946152.pdfIn PDF document text
    • https://pn-tapaktuan.go.id/pustaka/repository/minecraft-java-free-trial_GM479516143.pdfIn PDF document text
    • https://pn-tapaktuan.go.id/pustaka/repository/robux-withdraw_GM431946152.pdfIn PDF document text
    • https://pn-tapaktuan.go.id/pustaka/repository/coin-master-15-free-spin-link-of-last-5-days_GM406889139.pdfIn PDF document text
    • https://pn-tapaktuan.go.id/pustaka/repository/pokemon-go-free-and-inter-egg-sting-development_GM1094591345.pdfIn PDF document text
    • https://pn-tapaktuan.go.id/pustaka/repository/how-to-become-a-hacker-in-roblox-ios_GM431946152.pdfIn PDF document text
    • https://pn-tapaktuan.go.id/pustaka/repository/can-you-actually-get-free-robux_GM431946152.pdfIn PDF document text
    • https://pn-tapaktuan.go.id/pustaka/repository/rblx-city-free-robux_GM431946152.pdfIn PDF document text
    • https://pn-tapaktuan.go.id/pustaka/repository/coin-master-free-spins-cheat_GM406889139.pdfIn PDF document text
    • https://pn-tapaktuan.go.id/pustaka/repository/free-ninja-animation-pack-roblox_GM431946152.pdfIn PDF document text
    • https://pn-tapaktuan.go.id/pustaka/repository/free-robux-games_GM431946152.pdfIn PDF document text
    • https://pn-tapaktuan.go.id/pustaka/repository/latest-free-spin-coin-master-daily_GM406889139.pdfIn PDF document text
    • https://pn-tapaktuan.go.id/pustaka/repository/how-to-modify-stats-in-roblox-using-cheat-engine_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_off00002f8d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F8D 22420 bytes
SHA-256: 5e08f817da46aa0ada169615ac611421c8284a6b115140ea97a1da8e7bd64bf8
font_01_sfnt_off000061a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x61A1 18512 bytes
SHA-256: f42da8955ac0b14df7498282519dbf61ee386aa1420e52cc2fe2324e7f413181

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