Malicious PDF — malware analysis report

Static analysis result for SHA-256 4ea5060d81917012…

MALICIOUS

PDF

43.9 KB Created: 2021-06-09 12:49:41 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 4e92b52ae140c253d0e23c2d535eb760 SHA-1: 5610d13acfb9be2b1ba7d41546c58195b4b85f52 SHA-256: 4ea5060d81917012740b22b54cdf614aae4527b63d9931f36f2d5ac7169116d3
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple embedded links and a heuristic firing indicating it's a lure for game hacks, specifically mentioning 'roblox-free-synapse-game-hack'. The ML classifier strongly flagged this PDF as malicious. The presence of these links suggests the document is designed to redirect users to malicious websites, likely for phishing or malware distribution.

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.tw/app/431946152/roblox-free-synapse-game-hack PDF link annotation
    • http://library.fikes.upnvj.ac.id/repository/coin-master-hack-version_GM406889139.pdfIn PDF document text
    • http://library.fikes.upnvj.ac.id/repository/claim-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://library.fikes.upnvj.ac.id/repository/coin-master-free_GM406889139.pdfIn PDF document text
    • http://library.fikes.upnvj.ac.id/repository/how-to-hack-weight-lifting-simulator-roblox_GM431946152.pdfIn PDF document text
    • http://library.fikes.upnvj.ac.id/repository/free-robux-no-scam_GM431946152.pdfIn PDF document text
    • http://library.fikes.upnvj.ac.id/repository/roblox-skins-boy-free_GM431946152.pdfIn PDF document text
    • http://library.fikes.upnvj.ac.id/repository/haktuts-coin-master-free-daily-spins_GM406889139.pdfIn PDF document text
    • http://library.fikes.upnvj.ac.id/repository/how-do-you-get-free-roblox_GM431946152.pdfIn PDF document text
    • http://library.fikes.upnvj.ac.id/repository/free-private-server-links-for-lumbertycoon-2-roblox_GM431946152.pdfIn PDF document text
    • http://library.fikes.upnvj.ac.id/repository/www-roblox-com-robux-free_GM431946152.pdfIn PDF document text
    • http://library.fikes.upnvj.ac.id/repository/how-to-download-roblox-hacks-2021_GM431946152.pdfIn PDF document text
    • http://library.fikes.upnvj.ac.id/repository/www-coin-master_GM406889139.pdfIn PDF document text
    • http://library.fikes.upnvj.ac.id/repository/coin-master-free-spins-2021_GM406889139.pdfIn PDF document text
    • http://library.fikes.upnvj.ac.id/repository/my-roblox-account-was-hacked_GM431946152.pdfIn PDF document text
    • http://library.fikes.upnvj.ac.id/repository/how-to-earn-free-stars-on-coin-master_GM406889139.pdfIn PDF document text
    • http://library.fikes.upnvj.ac.id/repository/roblox-hacks-2021_GM431946152.pdfIn PDF document text
    • http://library.fikes.upnvj.ac.id/repository/huskybuscom-free-robux_GM431946152.pdfIn PDF document text
    • http://library.fikes.upnvj.ac.id/repository/free-robux-pins-2021_GM431946152.pdfIn PDF document text
    • http://library.fikes.upnvj.ac.id/repository/roblox-halloween-simulator-cheat_GM431946152.pdfIn PDF document text
    • http://library.fikes.upnvj.ac.id/repository/hack-coin-master-no-human-verification_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_off000051ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x51AC 23904 bytes
SHA-256: 378a6928dd396b991eac5d8cba34bde0bc626aeb95a5e3d1ab8516b8e9bf6fe8
font_01_sfnt_off00008838.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8838 18532 bytes
SHA-256: 4b0872310f793de2e2f12d7557ab47945ccaf5a732db89e95e87d97dc501b8cf

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