Malicious PDF — malware analysis report

Static analysis result for SHA-256 4b2b438633b36f2c…

MALICIOUS

PDF

34.8 KB Created: 2021-07-06 09:30:09 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 2144829a299916305e73300c376248bb SHA-1: f9654ad2b46379c66e099bdeba6bb81b72c5a3e6 SHA-256: 4b2b438633b36f2cc97a457042012d400a6e7c8198062f4fde142635e61e37bb
168 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and multiple links that redirect to a malicious website, disguised as a game hack. The primary lure is a 'Coin Master Hack Online 2021' which points to a known malicious redirector. This suggests the document is designed to trick users into visiting malicious infrastructure, likely for further exploitation or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 5

  • PDF links to a 'free generator / game hack' redirector critical 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. CRITICAL on its own: the /app/<id>/<slug>-game-hack path shape is unambiguous scam infra, and the host rotates so a host-list match can't be relied on.
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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
  • 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-online-2021-game-hack In PDF document text
    • http://www.ishvani.com/www/js/ckfinder/userfiles/files/how-to-hack-roblox-without-verification_GM431946152.pdfIn PDF document text
    • http://www.ishvani.com/www/js/ckfinder/userfiles/files/spins-gratis-coin-master-hoy_GM406889139.pdfIn PDF document text
    • http://www.ishvani.com/www/js/ckfinder/userfiles/files/minecraft-pe-apk-download-free-015-0_GM479516143.pdfIn PDF document text
    • http://www.ishvani.com/www/js/ckfinder/userfiles/files/roblox-getting-hacked_GM431946152.pdfIn PDF document text
    • http://www.ishvani.com/www/js/ckfinder/userfiles/files/rbxoffers-com-free-robux_GM431946152.pdfIn PDF document text
    • http://www.ishvani.com/www/js/ckfinder/userfiles/files/coin-master-2021-free-spins-link-blogspot_GM406889139.pdfIn PDF document text
    • http://www.ishvani.com/www/js/ckfinder/userfiles/files/scripte-free-robux_GM431946152.pdfIn PDF document text
    • http://www.ishvani.com/www/js/ckfinder/userfiles/files/roblox-number-censorship-cheat_GM431946152.pdfIn PDF document text
    • http://www.ishvani.com/www/js/ckfinder/userfiles/files/free-robux-gift-card-generator_GM431946152.pdfIn PDF document text
    • http://www.ishvani.com/www/js/ckfinder/userfiles/files/coin-master-mod-version-free-download-34-4_GM406889139.pdfIn PDF document text
    • http://www.ishvani.com/www/js/ckfinder/userfiles/files/free-roblox-hack-script_GM431946152.pdfIn PDF document text
    • http://www.ishvani.com/www/js/ckfinder/userfiles/files/guess-the-song-cheat-sheet-roblox_GM431946152.pdfIn PDF document text
    • http://www.ishvani.com/www/js/ckfinder/userfiles/files/coin-master-hack-2021-link_GM406889139.pdfIn PDF document text
    • http://www.ishvani.com/www/js/ckfinder/userfiles/files/how-to-get-free-robux-2021-winwos-n8_GM431946152.pdfIn PDF document text
    • http://www.ishvani.com/www/js/ckfinder/userfiles/files/roblox-army-robux_GM431946152.pdfIn PDF document text
    • http://www.ishvani.com/www/js/ckfinder/userfiles/files/where-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://www.ishvani.com/www/js/ckfinder/userfiles/files/get-free-spins-from-coin-master_GM406889139.pdfIn PDF document text
    • http://www.ishvani.com/www/js/ckfinder/userfiles/files/minecraft-account-hacked_GM479516143.pdfIn PDF document text
    • http://www.ishvani.com/www/js/ckfinder/userfiles/files/how-to-hack-coin-master-apple_GM406889139.pdfIn PDF document text
    • http://www.ishvani.com/www/js/ckfinder/userfiles/files/how-to-get-free-robux-2021-easy-no-inspect_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_off0000329e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x329E 22524 bytes
SHA-256: ddfb6bd29a914468dafbf03b5857b73c3c56177d476bd1d34aa11dc38f92ba7a
font_01_sfnt_off0000647d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x647D 18480 bytes
SHA-256: ef82715271ba1f94a45d6916d2ee21c9679af0e81bde34cb0f9ffa05e7cff0da

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