Malicious PDF — malware analysis report

Static analysis result for SHA-256 3c14c163b550fc87…

MALICIOUS

PDF

43.9 KB Created: 2021-06-03 07:14:43 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: dbbcd70196672100327c88029bb7be48 SHA-1: 5a3c77b8992aa1dcd80f0d3c22057e631821f6ba SHA-256: 3c14c163b550fc87cf4627141bbcae7c3828ee7b7b03ce0c18fcc41019c3cefe
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a prominent link disguised as a 'free Robux generator' or 'game hack', which is a common lure for malicious content. The embedded URL points to a suspicious domain, likely serving as a redirector or hosting a malicious payload. The ML classifier also flagged this PDF as malicious with high confidence.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

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 https://netcdn.online/app/431946152/free-robux-generator-no-human-verification-game-hack PDF link annotation
    • http://digilib.unla.ac.id/repository/how-to-get-free-things-on-roblox_GM431946152.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/coin-master-links-2021_GM406889139.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/free-robux-hack-no-human-verification_GM431946152.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/coin-master-hack-version_GM406889139.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/roblox-robux_GM431946152.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/how-to-hack-someone-on-roblox_GM431946152.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/free-roblox-shirts-templates_GM431946152.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/free-robux-pastebin_GM431946152.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/how-to-get-free-robux-no-verification-2021_GM431946152.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/free-robux-codes-no-verification_GM431946152.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/www-free-robux_GM431946152.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/get-free-robux-no-human-verification_GM431946152.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/how-to-get-free-skins-in-roblox_GM431946152.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/hack-coin-master-spin-apk_GM406889139.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/what-is-a-robux_GM431946152.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/free-spins-coin-master-hack-2021_GM406889139.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/robux-sign_GM431946152.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/free-robux-pin-codes_GM431946152.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/tiktok-download-free-jio-mobile_GM835599320.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/coin-master-free-spins-ios_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
stream_004_off00004f5a.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4F5A 24436 bytes
SHA-256: 447b75810c2367072145e7893aeac1a85a0f1aaabe8bd3924a3d55b0d1e7bfec
font_01_sfnt_off0000871f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x871F 18860 bytes
SHA-256: f1337887e63f46ec65b145f76804780e669468724c6330ac6fa0452b843b30d3

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