Malicious PDF — malware analysis report

Static analysis result for SHA-256 735135db6a2fdea5…

MALICIOUS

PDF

43.1 KB Created: 2021-06-03 16:57:57 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 05c6b1bc18b69fa1dd5074a1776df853 SHA-1: 5916e647837c109b4f397e7392a621661e864f43 SHA-256: 735135db6a2fdea5df576ab6f9d019b19cf9507ad47fa4b689cb6bfdba57b425
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a lure related to game hacks, specifically 'Pubg Uc On Discount', and redirects to the URL https://netcdn.online/app/1330123889/pubg-uc-on-discount-game-hack. This URL, along with others found in the document, suggests a phishing or malware distribution attempt. The ML classifier also flagged this PDF as malicious with high confidence.

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/1330123889/pubg-uc-on-discount-game-hack PDF link annotation
    • http://rkh.go.th/ckfinder/userfiles/files/how-to-hack-someones-roblox-account-with-google-chrome_GM431946152.pdfIn PDF document text
    • http://rkh.go.th/ckfinder/userfiles/files/roblox-system_GM431946152.pdfIn PDF document text
    • http://rkh.go.th/ckfinder/userfiles/files/coin-master-daily-free-spins_GM406889139.pdfIn PDF document text
    • http://rkh.go.th/ckfinder/userfiles/files/free-roblox-promo-codes-for-robux_GM431946152.pdfIn PDF document text
    • http://rkh.go.th/ckfinder/userfiles/files/free-robux-without-verification-or-survey_GM431946152.pdfIn PDF document text
    • http://rkh.go.th/ckfinder/userfiles/files/roblox-sued_GM431946152.pdfIn PDF document text
    • http://rkh.go.th/ckfinder/userfiles/files/coin-master-hack-2021-without-verification_GM406889139.pdfIn PDF document text
    • http://rkh.go.th/ckfinder/userfiles/files/free-attacks-coin-master_GM406889139.pdfIn PDF document text
    • http://rkh.go.th/ckfinder/userfiles/files/tiktok-free-hulu-account_GM835599320.pdfIn PDF document text
    • http://rkh.go.th/ckfinder/userfiles/files/minecraft-life-hacks_GM479516143.pdfIn PDF document text
    • http://rkh.go.th/ckfinder/userfiles/files/free-robux-com-real_GM431946152.pdfIn PDF document text
    • http://rkh.go.th/ckfinder/userfiles/files/coin-master-hack-tool-v1-9-download-free-pc_GM406889139.pdfIn PDF document text
    • http://rkh.go.th/ckfinder/userfiles/files/free-robux-roblox-promo-codes_GM431946152.pdfIn PDF document text
    • http://rkh.go.th/ckfinder/userfiles/files/facebook-coin-master_GM406889139.pdfIn PDF document text
    • http://rkh.go.th/ckfinder/userfiles/files/minecraft-windows-10-edition-free-with-java_GM479516143.pdfIn PDF document text
    • http://rkh.go.th/ckfinder/userfiles/files/roblox-free-item-codes_GM431946152.pdfIn PDF document text
    • http://rkh.go.th/ckfinder/userfiles/files/hack-coin-master-2021-pc_GM406889139.pdfIn PDF document text
    • http://rkh.go.th/ckfinder/userfiles/files/robux-xyz_GM431946152.pdfIn PDF document text
    • http://rkh.go.th/ckfinder/userfiles/files/wurst-115_GM479516143.pdfIn PDF document text
    • http://rkh.go.th/ckfinder/userfiles/files/how-to-earn-robux-for-free-2021_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
stream_004_off0000495d.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x495D 26512 bytes
SHA-256: f80ceecfdb869019184a3d4db7e5cc80c42a8636f2d0fdee9de2174cffe26b79
font_01_sfnt_off0000855e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x855E 18432 bytes
SHA-256: 0655261c84b5fa3f4c3b6f4529936c408c242175811dbd735e1c677ec7895855

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