Malicious PDF — malware analysis report

Static analysis result for SHA-256 f5d022b67f22a7cd…

MALICIOUS

PDF

34.9 KB Created: 2021-07-05 22:39:46 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 950025058238e4aaf5d7526ea2a19ac9 SHA-1: 53590a62cdc6fef2105faea47af038678e30bdae SHA-256: f5d022b67f22a7cd6b727d3b0be4eb623232183c2065cddc1c72baf70311ab78
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a lure for 'free Robux codes' and game hacks, directing users to the URL http://netcdn.tw/app/431946152/how-to-get-free-robux-codes-game-hack. This URL is flagged as a redirector to a malicious site. The document body and heuristics indicate a social engineering tactic to trick users into visiting a potentially harmful website, likely for credential harvesting or malware distribution.

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.tw/app/431946152/how-to-get-free-robux-codes-game-hack PDF link annotation
    • http://lib.teknik.unimal.ac.id/repository/free-roblox-obc-generator_GM431946152.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id/repository/roblox-hack-robux-windows-10_GM431946152.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id/repository/roblox-magic-training-wand-free_GM431946152.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id/repository/free-coin-master-spins_GM406889139.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id//repository/hackear-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id/repository/80-robux-hack_GM431946152.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id/repository/animations-give-free-robux_GM431946152.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id/repository/can-you-get-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id/repository/lua-roblox-hack_GM431946152.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id/repository/minecraft-free-download-iphone_GM479516143.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id/repository/free-roblox-invitations-loadstrings-full-lua_GM431946152.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id//repository/hackear-coin-master-espaol_GM406889139.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id/repository/how-to-get-free-robux-no-generator_GM431946152.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id/repository/free-robux-redeem-codes-2021_GM431946152.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id/repository/how-to-install-a-hacked-client-roblox-mac_GM431946152.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id/repository/trade-hangout-roblox-ask-robux-free_GM431946152.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id/repository/roblox-strucid-free-vip-server_GM431946152.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id/repository/where-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id/repository/minecraft-modded-client_GM479516143.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id//repository/wurst_GM479516143.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_off000031cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x31CB 22108 bytes
SHA-256: 1a539ee75a1b868d52e420744884df48523e6c6cfc581cc721fb1630205f4844
font_01_sfnt_off000062d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x62D7 19156 bytes
SHA-256: d834416b7e9185468f589fe40c9632ebbdbdfe97c28f85986fef52e4c0b1d557

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