Malicious PDF — malware analysis report

Static analysis result for SHA-256 efa200e16d37582d…

MALICIOUS

PDF

35.9 KB Created: 2021-07-01 15:15:57 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: a58b924c301edb7ff0156c2e85ccb7db SHA-1: 37d98c2d808749377d5f5fdfed51630b868cbab3 SHA-256: efa200e16d37582dc2c7cddd7d54ccdb20e802df8f02acdba9e146f8b262a9ec
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains embedded URLs and text that lure the user with promises of game hacks and free currency, specifically mentioning Roblox and Cheat Engine. The primary URL, http://netcdn.co/app/431946152/how-to-execute-code-with-cheat-engine-on-roblox-game-hack, is flagged as a redirector to a game hack lure. This suggests the document is designed to trick users into visiting a malicious site, likely to download further malware or engage in credential harvesting.

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-execute-code-with-cheat-engine-on-roblox-game-hack PDF link annotation
    • https://smark.com.tw/image/data/files/free-spins-coin-master-hack-2021_GM406889139.pdfIn PDF document text
    • https://smark.com.tw/image/data/files/free-tiktok-likes_GM835599320.pdfIn PDF document text
    • https://smark.com.tw/image/data/files/all-links-for-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://smark.com.tw/image/data/files/how-to-get-free-robux-not-a-scam_GM431946152.pdfIn PDF document text
    • https://smark.com.tw/image/data/files/pubg-uc-zarah_GM1330123889.pdfIn PDF document text
    • https://smark.com.tw/image/data/files/free-robux-minecraft_GM431946152.pdfIn PDF document text
    • https://smark.com.tw/image/data/files/minecraft-windows-10-free_GM479516143.pdfIn PDF document text
    • https://smark.com.tw/image/data/files/coin-master-free-spins-link_GM406889139.pdfIn PDF document text
    • https://smark.com.tw/image/data/files/coin-master-online-free-spin_GM406889139.pdfIn PDF document text
    • https://smark.com.tw/image/data/files/roblox-hack-murder-mystery-2_GM431946152.pdfIn PDF document text
    • https://smark.com.tw/image/data/files/how-to-hack-roblox-2021_GM431946152.pdfIn PDF document text
    • https://smark.com.tw/image/data/files/haktuts-2021-coin-master-free-spin-link_GM406889139.pdfIn PDF document text
    • https://smark.com.tw/image/data/files/free-robux-website_GM431946152.pdfIn PDF document text
    • https://smark.com.tw/image/data/files/master-coin-hack-app_GM406889139.pdfIn PDF document text
    • https://smark.com.tw/image/data/files/coin-master-hacks-no-surveys_GM406889139.pdfIn PDF document text
    • https://smark.com.tw/image/data/files/how-to-get-free-spins-on-coin-master-2021-links_GM406889139.pdfIn PDF document text
    • https://smark.com.tw/image/data/files/free-robux-hack-no-verification-2021_GM431946152.pdfIn PDF document text
    • https://smark.com.tw/image/data/files/roblox36com-free-robux_GM431946152.pdfIn PDF document text
    • https://smark.com.tw/image/data/files/cheats-coin-master-free-spins-and-news_GM406889139.pdfIn PDF document text
    • https://smark.com.tw/image/data/files/coin-master-free-coins_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_off00003156.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3156 23164 bytes
SHA-256: 085bc16d0827f1fcf9ceaa6d55617eac3ee235bf58600eff6bbfbf7dce7171eb
font_01_sfnt_off000065a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x65A3 19552 bytes
SHA-256: 4a5d7242bea879680230d82dafe9468d318ef14c6aca48dc14ab4afe1cce4d9e

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