Malicious PDF — malware analysis report

Static analysis result for SHA-256 9ae61d1d10e3527b…

MALICIOUS

PDF

33.5 KB Created: 2021-07-09 07:09:26 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-01
MD5: c026fad574de28af76a8c78598c28d30 SHA-1: 358323a016b02fc3c214962546b8a481794819f6 SHA-256: 9ae61d1d10e3527b99e164db524484c11d0bdad5568d8cc8189742dea7fc4635
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/406889139/master-free-spin-game-hack PDF link annotation
    • https://cnc-xinrong.com.tw/image/data/files/download-minecraft-free-hiapphere_GM479516143.pdfIn PDF document text
    • https://cnc-xinrong.com.tw/image/data/files/free-robux-hacker-us_GM431946152.pdfIn PDF document text
    • https://cnc-xinrong.com.tw/image/data/files/robux-free-com_GM431946152.pdfIn PDF document text
    • https://cnc-xinrong.com.tw/image/data/files/tiktok-free-up-space_GM835599320.pdfIn PDF document text
    • https://cnc-xinrong.com.tw/image/data/files/free-robux-no-human-verification-no-survey_GM431946152.pdfIn PDF document text
    • https://cnc-xinrong.com.tw/image/data/files/coin-master-free-spin-ml_GM406889139.pdfIn PDF document text
    • https://cnc-xinrong.com.tw/image/data/files/penguinson-roblox-free-robux-hack_GM431946152.pdfIn PDF document text
    • https://cnc-xinrong.com.tw/image/data/files/hack-spin-coin-master_GM406889139.pdfIn PDF document text
    • https://cnc-xinrong.com.tw/image/data/files/coin-master-daily-free-spins-link-today-2021-free_GM406889139.pdfIn PDF document text
    • https://cnc-xinrong.com.tw/image/data/files/windows-10-minecraft-hacks_GM479516143.pdfIn PDF document text
    • https://cnc-xinrong.com.tw/image/data/files/coin-master-hack-apk-2021_GM406889139.pdfIn PDF document text
    • https://cnc-xinrong.com.tw/image/data/files/roblox-commands-hack_GM431946152.pdfIn PDF document text
    • https://cnc-xinrong.com.tw/image/data/files/rbx-free-robux_GM431946152.pdfIn PDF document text
    • https://cnc-xinrong.com.tw/image/data/files/coin-master-100-free-spins-link_GM406889139.pdfIn PDF document text
    • https://cnc-xinrong.com.tw/image/data/files/roblox-cs-go-money-hack_GM431946152.pdfIn PDF document text
    • https://cnc-xinrong.com.tw/image/data/files/cheat-pour-phantom-force-roblox_GM431946152.pdfIn PDF document text
    • https://cnc-xinrong.com.tw/image/data/files/how-to-minecraft-for-free_GM479516143.pdfIn PDF document text
    • https://cnc-xinrong.com.tw/image/data/files/cheat-engine-work-on-roblox_GM431946152.pdfIn PDF document text
    • https://cnc-xinrong.com.tw/image/data/files/coin-master-guide-to-free-spins-and-rewards_GM406889139.pdfIn PDF document text
    • https://cnc-xinrong.com.tw/image/data/files/roblox-clone-cheat_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_off00002ed3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2ED3 22440 bytes
SHA-256: 632fb9e3bd346e8a97d8113964db28bdaf12430b75d4c472faa18b3c5521fbe0
font_01_sfnt_off000060d8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x60D8 18032 bytes
SHA-256: b83729afdc19971bf6a9527ae38a1fe34cd1a27a07ca5c3ae75379af816a88cf

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