Malicious PDF — malware analysis report

Static analysis result for SHA-256 3ec86994a660a2cf…

MALICIOUS

PDF

33.0 KB Created: 2021-07-03 14:57:23 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 5d49c06068889a0d9fd7f3a25c8340dd SHA-1: a9ff9e742a59cfeed0769bcdc5df4a44e1141c31 SHA-256: 3ec86994a660a2cfcde8afa11dc294d88cc8350f5d5e69a97df07b207d37e90c
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. The file routes users through malicious redirector infrastructure and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9824

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/free-roblox-gift-card-hack-game-hack PDF link annotation
    • http://lib.smklabor.sch.id/repository/free-robux-hack-december-2021_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/money-hack-roblox-jailbreak-2021_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/hack-roblox-accounts-website_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/roblox-free-shirts-catalog_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/robuxmatchcom-free-robux_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/rbxoffers-earn-free-robux_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/coin-master-links-free-spins_GM406889139.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/how-i-can-get-free-robux_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/www-free-robux-win_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/roblox-zone-free-robux_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/free-money-roblox-audio_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/d-injector-roblox-hacker_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/coin-master-free-spins-hack_GM406889139.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/does-free-robux-work_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/robux-hack-tools_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/roblox-cheat-engine-health-hack_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/free-accounts-that-have-robux_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/free-spin-link-for-coin-master-game_GM406889139.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/how-to-get-roblox-animations-for-free_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/cheat-engine-62-roblox-mac_GM431946152.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_off000029f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x29F8 22240 bytes
SHA-256: 6dd8504e906ec41ff688c023aded18ae72d2572650a946d139b5bf65d29f0dfd
font_01_sfnt_off00005ba7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5BA7 19220 bytes
SHA-256: 632ab469dd20ebf6c2c7e1a9ca3ed0d4d82bd26e25bcd5cda830d08a52150e95

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