Malicious PDF — malware analysis report

Static analysis result for SHA-256 31aea8feb7bf9a1b…

MALICIOUS

PDF

34.5 KB Created: 2021-07-05 14:17:24 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 7f8ed9000224b80cabf6cd97d755a789 SHA-1: f3d99424f8feedf358a1d455a4fccd56b063c9b3 SHA-256: 31aea8feb7bf9a1b2ddac71ea58b46c8f89ece8c32ee173e0d509b8f2b287aa4
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple embedded URLs and a lure for game hacks, specifically targeting Coin Master and Roblox. The primary URL, http://netcdn.tw/app/406889139/coin-master-hack-ios-reddit-game-hack, is flagged as a game hack redirector. While no scripts were explicitly extracted, the PDF structure and embedded links strongly suggest a social engineering tactic to trick users into downloading malicious content or visiting phishing sites.

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-hack-ios-reddit-game-hack PDF link annotation
    • http://pustaka.smpmuh2yk.sch.id//repository/coin-master-level-4_GM406889139.pdfIn PDF document text
    • http://pustaka.smpmuh2yk.sch.id//repository/free-roblox-hack-us_GM431946152.pdfIn PDF document text
    • http://pustaka.smpmuh2yk.sch.id/repository/how-to-jump-high-in-roblox-cheat-engine_GM431946152.pdfIn PDF document text
    • http://pustaka.smpmuh2yk.sch.id//repository/free-robux-no-verification-2021-ios_GM431946152.pdfIn PDF document text
    • http://pustaka.smpmuh2yk.sch.id/repository/roblox-hack-2021exe-download_GM431946152.pdfIn PDF document text
    • http://pustaka.smpmuh2yk.sch.id/repository/coin-master-free-spins-deutsch-download-2021-link_GM406889139.pdfIn PDF document text
    • http://pustaka.smpmuh2yk.sch.id//repository/roblox-com-hack_GM431946152.pdfIn PDF document text
    • http://pustaka.smpmuh2yk.sch.id/repository/roblox-cheat-engine-64-money-hack_GM431946152.pdfIn PDF document text
    • http://pustaka.smpmuh2yk.sch.id/repository/2021-free-robux-no-website_GM431946152.pdfIn PDF document text
    • http://pustaka.smpmuh2yk.sch.id/repository/free-roblox-com_GM431946152.pdfIn PDF document text
    • http://pustaka.smpmuh2yk.sch.id/repository/free-spins-and-coins-coin-master-links_GM406889139.pdfIn PDF document text
    • http://pustaka.smpmuh2yk.sch.id/repository/coin-master-hack-tool-without-human-verification_GM406889139.pdfIn PDF document text
    • http://pustaka.smpmuh2yk.sch.id/repository/roblox-vehicle-simulator-hack_GM431946152.pdfIn PDF document text
    • http://pustaka.smpmuh2yk.sch.id/repository/how-to-get-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • http://pustaka.smpmuh2yk.sch.id/repository/how-to-free-robux_GM431946152.pdfIn PDF document text
    • http://pustaka.smpmuh2yk.sch.id/repository/how-do-you-get-free-food-in-coin-master_GM406889139.pdfIn PDF document text
    • http://pustaka.smpmuh2yk.sch.id/repository/tiktok-likes-free-2021_GM835599320.pdfIn PDF document text
    • http://pustaka.smpmuh2yk.sch.id//repository/www-coinmaster_GM406889139.pdfIn PDF document text
    • http://pustaka.smpmuh2yk.sch.id//repository/free-coins-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://pustaka.smpmuh2yk.sch.id/repository/cheat-codes-for-roblox-bee-swarm-simulator_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_off0000318e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x318E 22744 bytes
SHA-256: 11f64161fc4c3689a839cdc6cda67deae2eb0038e78f3c368a152a72b627e2c6
font_01_sfnt_off00006462.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6462 18180 bytes
SHA-256: 36a5529bcec1a9ebfeb67e8a1c9eb6b6afb40cca80507846db0d415d086f7376

Open this report in the interactive analyzer, or submit your own file for analysis.