Malicious PDF — malware analysis report

Static analysis result for SHA-256 6f83c58cc3f24cef…

MALICIOUS

PDF

43.5 KB Created: 2021-06-04 01:05:19 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: c93d52c8bf8a60c839a11abce85287dc SHA-1: caf69b2927de4ee51ef3d5bc4945c71e7a708d2c SHA-256: 6f83c58cc3f24cef3fb74255cabd8e1ee2e6aa99d536b262ef83028a2f3fee63
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains a high-severity heuristic indicating it links to a game hack redirector, specifically 'https://netcdn.online/app/479516143/wurst-112-2-game-hack'. The document body, though heavily obfuscated, also contains references to game-related terms and URLs. The ML classifier strongly flagged this PDF as malicious. The primary attack pattern observed is the use of a lure to direct users to a potentially malicious external resource.

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/479516143/wurst-112-2-game-hack PDF link annotation
    • https://library.uigm.ac.id/repository/minecraft-skins-free-girl_GM479516143.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/easiest-coin-master-hack_GM406889139.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/roblox-apk-hack_GM431946152.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/blox-world-free-robux_GM431946152.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/coin-master-gift-link-hack_GM406889139.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/minecraft-pe-hack-client-ios_GM479516143.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/spin-and-coin_GM406889139.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/how-to-get-free-minecraft-skins_GM479516143.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/tiktok-minecraft-hacks_GM479516143.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/synapse-roblox-free_GM431946152.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/free-robux-hack-no-human-verification_GM431946152.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/roblox-arsenal-hack_GM431946152.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/robux-fun-hack_GM431946152.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/free-outfits-roblox_GM431946152.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/hacks-para-roblox_GM431946152.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/is-minecraft-free-on-xbox-one_GM479516143.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/how-to-get-free-robux-hack_GM431946152.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/roblox-free-robux-generator_GM431946152.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/get-robux-com_GM431946152.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/free-coins-for-planet-master-game_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_off00004f4d.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4F4D 25544 bytes
SHA-256: 65ecf43244331d3005abf16baddbb02ad3d2608962a83c74e89218a178073a87
font_01_sfnt_off000088f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x88F7 17788 bytes
SHA-256: ce3f60beb4de00bcffae905034889af3c96f4f191e5c47ffd96b019a9d508339

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