Malicious PDF — malware analysis report

Static analysis result for SHA-256 10fc49640e786932…

MALICIOUS

PDF

34.7 KB Created: 2021-07-04 20:29:24 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-05
MD5: c8299c28039075a232f2c2ad6e454302 SHA-1: 78a059dc500be568f0340662056d1f9a0d7a5e24 SHA-256: 10fc49640e786932c4e6b52d7eb6b1d11b014ee105ef8c73739ce616d3a15fc1
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF document contains a lure for a 'free generator / game hack' which redirects to a download URL. This is a common social engineering tactic to trick users into downloading malicious files. The ML classifier also strongly indicated maliciousness.

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/479516143/download-minecraft-free-hiapphere-game-hack PDF link annotation
    • http://assets.dpt.go.th/dptda/ckfinder/userfiles/files/pubg-uc-top-up-center_GM1330123889.pdfIn PDF document text
    • http://assets.dpt.go.th/dptda/ckfinder/userfiles/files/roblox-com-free-play_GM431946152.pdfIn PDF document text
    • http://assets.dpt.go.th/dptda/ckfinder/userfiles/files/free-spins-and-coins-coin-master-2021-link_GM406889139.pdfIn PDF document text
    • http://assets.dpt.go.th/dptda/ckfinder/userfiles/files/coin-master-hack-online_GM406889139.pdfIn PDF document text
    • http://assets.dpt.go.th/dptda/ckfinder/userfiles/files/how-to-hack-destruction-simulator-roblox_GM431946152.pdfIn PDF document text
    • http://assets.dpt.go.th/dptda/ckfinder/userfiles/files/coin-master-daily-free-spins-blogspot_GM406889139.pdfIn PDF document text
    • http://assets.dpt.go.th/dptda/ckfinder/userfiles/files/coin-master-deals_GM406889139.pdfIn PDF document text
    • http://assets.dpt.go.th/dptda/ckfinder/userfiles/files/free-spin-link-coin-master-today_GM406889139.pdfIn PDF document text
    • http://assets.dpt.go.th/dptda/ckfinder/userfiles/files/roblox-hacks-to-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://assets.dpt.go.th/dptda/ckfinder/userfiles/files/free-robux-no-survey-or-verification-2021_GM431946152.pdfIn PDF document text
    • http://assets.dpt.go.th/dptda/ckfinder/userfiles/files/free-account-on-roblox-with-obc_GM431946152.pdfIn PDF document text
    • http://assets.dpt.go.th/dptda/ckfinder/userfiles/files/coin-master-free-spins-app_GM406889139.pdfIn PDF document text
    • http://assets.dpt.go.th/dptda/ckfinder/userfiles/files/roblox-weight-lifting-simulator-2-hack-script-download_GM431946152.pdfIn PDF document text
    • http://assets.dpt.go.th/dptda/ckfinder/userfiles/files/roblox-free-robux-limited-time_GM431946152.pdfIn PDF document text
    • http://assets.dpt.go.th/dptda/ckfinder/userfiles/files/toolbox-mod_GM479516143.pdfIn PDF document text
    • http://assets.dpt.go.th/dptda/ckfinder/userfiles/files/free-robux-group_GM431946152.pdfIn PDF document text
    • http://assets.dpt.go.th/dptda/ckfinder/userfiles/files/free-robux-no-download-on-ipad_GM431946152.pdfIn PDF document text
    • http://assets.dpt.go.th/dptda/ckfinder/userfiles/files/free-minecraft-for-kids_GM479516143.pdfIn PDF document text
    • http://assets.dpt.go.th/dptda/ckfinder/userfiles/files/free-chest-coin-master_GM406889139.pdfIn PDF document text
    • http://assets.dpt.go.th/dptda/ckfinder/userfiles/files/free-followers-on-tiktok_GM835599320.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_off000030e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x30E4 22488 bytes
SHA-256: 0146508ef6fca1ab6e4414cacd3437e0d516317ac20e8c9fab28a52ebffaa7c5
font_01_sfnt_off00006304.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6304 18920 bytes
SHA-256: f5e6d66979b5c86b52eb520d87716e03a090c5e5ddb9498a449d0afa8dd17a93

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