Malicious PDF — malware analysis report

Static analysis result for SHA-256 597656386e4e2f84…

MALICIOUS

PDF

35.3 KB Created: 2021-06-28 01:36:52 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: a27d204b1acc9bc01b41ce906b7fe18f SHA-1: d9a707bca6d6327d337c17a252d4e68b674e1133 SHA-256: 597656386e4e2f8423b4ded3e0f0d30a6d26006501be5d6e34ed05dc44beaa06
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document employs a common lure of 'game hacks' and 'free currency' to entice users to click on embedded links. The primary link, http://netcdn.co/app/431946152/comandos-de-hacker-roblox-game-hack, and numerous other URLs hosted on pspmrsmkkb.com, likely lead to malicious sites designed for credential harvesting or further malware distribution. The ML classifier strongly indicated maliciousness, supporting the analysis of the lure and embedded URLs.

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/comandos-de-hacker-roblox-game-hack PDF link annotation
    • http://www.pspmrsmkkb.com/webopac/repository/how-to-get-free-robux-without-verifying-2021_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmkkb.com/webopac/repository/roblox-shirts-and-pants-free_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmkkb.com/webopac/repository/rbl-gg-free-robux_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmkkb.com/webopac/repository/coin-master-free-gift-link-2021_GM406889139.pdfIn PDF document text
    • http://www.pspmrsmkkb.com/webopac/repository/coin-master-hack-without-verification_GM406889139.pdfIn PDF document text
    • http://www.pspmrsmkkb.com/webopac/repository/free-robux-no-survey-or-human-verification-2021_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmkkb.com/webopac/repository/best-free-spin-app-for-coin-master_GM406889139.pdfIn PDF document text
    • http://www.pspmrsmkkb.com/webopac/repository/coin-master-free-coins-and-spins-link_GM406889139.pdfIn PDF document text
    • http://www.pspmrsmkkb.com/webopac/repository/free-robux-no-human-verification_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmkkb.com/webopac/repository/coin-master-daily-free-spins-link-today_GM406889139.pdfIn PDF document text
    • http://www.pspmrsmkkb.com/webopac/repository/how-hack-a-roblox-account_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmkkb.com/webopac/repository/how-to-get-free-daily-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://www.pspmrsmkkb.com/webopac/repository/free-stuff-in-roblox-2021_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmkkb.com/webopac/repository/free-robux-2021-android_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmkkb.com/webopac/repository/free-robux-generator-without-verification_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmkkb.com/webopac/repository/how-to-hack-roblox-website-unpatched-rubox_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmkkb.com/webopac/repository/what-is-wurst_GM479516143.pdfIn PDF document text
    • http://www.pspmrsmkkb.com/webopac/repository/how-to-get-minecraft-for-free-on-mobile_GM479516143.pdfIn PDF document text
    • http://www.pspmrsmkkb.com/webopac/repository/spin-links-for-coin-master_GM406889139.pdfIn PDF document text
    • http://www.pspmrsmkkb.com/webopac/repository/roblox-robux-generator-no-human-verification_GM431946152.pdfIn PDF document text
    • https://www.roblox.com/.IIn 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_off000032f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x32F6 22332 bytes
SHA-256: 6745b4fef2d6b7a8104e22109fa88bfbdaa7e5a03e982d9bcbce38817b07c1f1
font_01_sfnt_off0000645e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x645E 19256 bytes
SHA-256: 488a6eeb3df122ae38f6665476897f5971af34489e2d43f1416b87b0c6ba2b15

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