Malicious PDF — malware analysis report

Static analysis result for SHA-256 0eb72aceb0e35e8d…

MALICIOUS

PDF

33.8 KB Created: 2021-07-05 07:34:36 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 66dafb8cfdea7d7ceb10bc6525fdc078 SHA-1: 2d0adc50d4a7b45564d4c1b38adf06fe0b4897cd SHA-256: 0eb72aceb0e35e8d97584ad6e3daa2d14d5dfdb62727eaa7ecc673c32a3c6cd6
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 0.9980

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/free-minecraft-com-game-hack PDF link annotation
    • https://humansci.kyst.com.tw/image/data/files/free-spins-and-coins-coin-master-links_GM406889139.pdfIn PDF document text
    • https://humansci.kyst.com.tw/image/data/files/dbo-roblox-stats-hack_GM431946152.pdfIn PDF document text
    • https://humansci.kyst.com.tw/image/data/files/pastebin-roblox-free-robux-2021_GM431946152.pdfIn PDF document text
    • https://humansci.kyst.com.tw/image/data/files/item-for-free-roblox_GM431946152.pdfIn PDF document text
    • https://humansci.kyst.com.tw/image/data/files/free-tiktok-fans_GM835599320.pdfIn PDF document text
    • https://humansci.kyst.com.tw/image/data/files/free-spin-coin-master-iphone_GM406889139.pdfIn PDF document text
    • https://humansci.kyst.com.tw/image/data/files/tiktok-free-speech_GM835599320.pdfIn PDF document text
    • https://humansci.kyst.com.tw/image/data/files/coin-master-free-daily-rewards_GM406889139.pdfIn PDF document text
    • https://humansci.kyst.com.tw/image/data/files/roblox-exe-editor-cheat-engine_GM431946152.pdfIn PDF document text
    • https://humansci.kyst.com.tw/image/data/files/minecraft-free-download-windows_GM479516143.pdfIn PDF document text
    • https://humansci.kyst.com.tw/image/data/files/robux-hack-generator_GM431946152.pdfIn PDF document text
    • https://humansci.kyst.com.tw/image/data/files/lemon-aid-roblox-hack_GM431946152.pdfIn PDF document text
    • https://humansci.kyst.com.tw/image/data/files/get-free-spins-coin-master-october-2021_GM406889139.pdfIn PDF document text
    • https://humansci.kyst.com.tw/image/data/files/free-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://humansci.kyst.com.tw/image/data/files/free-robux-may-2021_GM431946152.pdfIn PDF document text
    • https://humansci.kyst.com.tw/image/data/files/how-many-levels-in-coin-master_GM406889139.pdfIn PDF document text
    • https://humansci.kyst.com.tw/image/data/files/pubg-uc-on-discount_GM1330123889.pdfIn PDF document text
    • https://humansci.kyst.com.tw/image/data/files/how-to-get-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • https://humansci.kyst.com.tw/image/data/files/roblox-upload-audio-for-free_GM431946152.pdfIn PDF document text
    • https://humansci.kyst.com.tw/image/data/files/earn-free-robux-for-roblox_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_off00002ff2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2FF2 22436 bytes
SHA-256: 98e4860a5ec65724802aaf1e2d11498fa19619d1d520b885e8ec1ce00c251f85
font_01_sfnt_off0000617d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x617D 18260 bytes
SHA-256: caf027f2ba7eab55ccda80ce4a32e0bdd0518a11b2f9a87787e371bc5019346d

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