Malicious PDF — malware analysis report

Static analysis result for SHA-256 ff20d6a08e3cb0fc…

MALICIOUS

PDF

34.7 KB Created: 2021-06-20 00:23:15 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 37e533bebc8fb06b18da05f8957a30bc SHA-1: 78211f7f4301ca92f303c7fa448200068edf06e9 SHA-256: ff20d6a08e3cb0fcd76729705d26096155a38549d2558951cc8f7fdb229a40ac
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.co/app/431946152/how-to-hack-roblox-with-inspect-element-2021-game-hack PDF link annotation
    • https://cnc-xinrong.com.tw/image/data/files/minecraft-that-you-can-play-for-free_GM479516143.pdfIn PDF document text
    • https://cnc-xinrong.com.tw/image/data/files/coin-master-hacks-no-verification_GM406889139.pdfIn PDF document text
    • https://cnc-xinrong.com.tw/image/data/files/coin-master-hack-without-verify_GM406889139.pdfIn PDF document text
    • https://cnc-xinrong.com.tw/image/data/files/roblox-arsenal-hacks-download_GM431946152.pdfIn PDF document text
    • https://cnc-xinrong.com.tw/image/data/files/no-human-verification-coin-master-hack_GM406889139.pdfIn PDF document text
    • https://cnc-xinrong.com.tw/image/data/files/free-robux-mod_GM431946152.pdfIn PDF document text
    • https://cnc-xinrong.com.tw/image/data/files/get-free-robux-now_GM431946152.pdfIn PDF document text
    • https://cnc-xinrong.com.tw/image/data/files/roblox-online-play-hacked-infinite-robux_GM431946152.pdfIn PDF document text
    • https://cnc-xinrong.com.tw/image/data/files/how-do-you-get-free-robux_GM431946152.pdfIn PDF document text
    • https://cnc-xinrong.com.tw/image/data/files/roblox-speed-and-jump-hack_GM431946152.pdfIn PDF document text
    • https://cnc-xinrong.com.tw/image/data/files/roblox-can-you-teach-me-how-to-hack_GM431946152.pdfIn PDF document text
    • https://cnc-xinrong.com.tw/image/data/files/how-to-hack-roblox-in-1-min_GM431946152.pdfIn PDF document text
    • https://cnc-xinrong.com.tw/image/data/files/8bp-hack-coin-master_GM406889139.pdfIn PDF document text
    • https://cnc-xinrong.com.tw/image/data/files/coin-master-free-spins-usa-2021_GM406889139.pdfIn PDF document text
    • https://cnc-xinrong.com.tw/image/data/files/hack-niveau-roblox-slaying-simulator_GM431946152.pdfIn PDF document text
    • https://cnc-xinrong.com.tw/image/data/files/master-free-spin-and-coin-link_GM406889139.pdfIn PDF document text
    • https://cnc-xinrong.com.tw/image/data/files/is-there-a-way-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://cnc-xinrong.com.tw/image/data/files/free-jailbreak-coins-roblox_GM431946152.pdfIn PDF document text
    • https://cnc-xinrong.com.tw/image/data/files/code-free-robux_GM431946152.pdfIn PDF document text
    • https://cnc-xinrong.com.tw/image/data/files/how-to-sell-at-shirt-for-free-on-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_off00002f4b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F4B 21772 bytes
SHA-256: b2a2cac7d222db8e392ffe7f394fd62639ffde40faf31a663891e958bb20e790
font_01_sfnt_off00005f2c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5F2C 20248 bytes
SHA-256: 06af6477b71a07c0d7da342e7dff32c358123c50e1adfc7bf45d9181998cf257

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