Malicious PDF — malware analysis report

Static analysis result for SHA-256 5d99af348d0ee63d…

MALICIOUS

PDF

35.8 KB Created: 2021-06-19 20:27:01 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-17
MD5: f490c14ab9c7e253f2c14384784cb93a SHA-1: 7f95afc9aec20b3d559b8912b038879e85a425ce SHA-256: 5d99af348d0ee63da04c60d7b453551ff076ffcb840a3de25ab2aed876902d7b
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a lure for a game hack, directing users to a suspicious URL. The ML classifier strongly indicated maliciousness, and the presence of embedded links further supports a phishing or social engineering attack. While no scripts were explicitly extracted, the PDF structure and embedded links suggest an attempt to redirect users to a malicious site, likely for credential harvesting or malware delivery.

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/406889139/how-to-hack-coin-master-ios-no-jailbreak-game-hack PDF link annotation
    • https://www.hearcolors.com.mx/img/blog/files/how-to-get-free-coins-in-coin-master_GM406889139.pdfIn PDF document text
    • https://www.hearcolors.com.mx/img/blog/files/get-free-robux-from-roblox_GM431946152.pdfIn PDF document text
    • https://www.hearcolors.com.mx/img/blog/files/free-robux-trade_GM431946152.pdfIn PDF document text
    • https://www.hearcolors.com.mx/img/blog/files/how-to-get-free-robux-easy-2021_GM431946152.pdfIn PDF document text
    • https://www.hearcolors.com.mx/img/blog/files/promo-codes-for-free-robux_GM431946152.pdfIn PDF document text
    • https://www.hearcolors.com.mx/img/blog/files/coinmasterfreespins_GM406889139.pdfIn PDF document text
    • https://www.hearcolors.com.mx/img/blog/files/jailbreak-hacks-for-roblox_GM431946152.pdfIn PDF document text
    • https://www.hearcolors.com.mx/img/blog/files/btools-hack-roblox-download-2021_GM431946152.pdfIn PDF document text
    • https://www.hearcolors.com.mx/img/blog/files/dinosaur-simulator-roblox-cheats_GM431946152.pdfIn PDF document text
    • https://www.hearcolors.com.mx/img/blog/files/free-coin-master-gifts_GM406889139.pdfIn PDF document text
    • https://www.hearcolors.com.mx/img/blog/files/coin-master-hack-2021_GM406889139.pdfIn PDF document text
    • https://www.hearcolors.com.mx/img/blog/files/hack-coin-master-spin-apk_GM406889139.pdfIn PDF document text
    • https://www.hearcolors.com.mx/img/blog/files/easy-robux-hack-no-human-verification_GM431946152.pdfIn PDF document text
    • https://www.hearcolors.com.mx/img/blog/files/download-coin-master-apk-hack_GM406889139.pdfIn PDF document text
    • https://www.hearcolors.com.mx/img/blog/files/coin-master-spin-link-free-download_GM406889139.pdfIn PDF document text
    • https://www.hearcolors.com.mx/img/blog/files/how-to-get-free-robux-not-a-scam_GM431946152.pdfIn PDF document text
    • https://www.hearcolors.com.mx/img/blog/files/free-robux-generator_GM431946152.pdfIn PDF document text
    • https://www.hearcolors.com.mx/img/blog/files/hack-game-coin-master_GM406889139.pdfIn PDF document text
    • https://www.hearcolors.com.mx/img/blog/files/free-robux-generator-no-human-verification_GM431946152.pdfIn PDF document text
    • https://www.hearcolors.com.mx/img/blog/files/coin-master-free-spins-youthnow_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_off0000352b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x352B 22912 bytes
SHA-256: bf96fd4d28059ec3fd05bf42bdd0fbacb5e5cfecf44ac12ba0c84550ad586e0d
font_01_sfnt_off00006866.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6866 18564 bytes
SHA-256: 8c857114d4d06b15aac3e6119f646dd7324d7075ef3c5cadb5600415bfe88c24

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