Malicious PDF — malware analysis report

Static analysis result for SHA-256 2b765ac73b4043f9…

MALICIOUS

PDF

33.9 KB Created: 2021-07-04 05:22:06 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 1149bded2ff86b6f2a6e4438eacd2a20 SHA-1: 10f266f845822b198baeb802a02378268fe48dd2 SHA-256: 2b765ac73b4043f9edd84cc4736b8454e8a1941c9d180d3091268a8ffb591044
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/is-minecraft-free-on-mac-game-hack PDF link annotation
    • https://new-era.com.tw/image/data/files/how-to-get-a-free-gift-card-on-roblox_GM431946152.pdfIn PDF document text
    • https://new-era.com.tw/image/data/files/minecraft-pe-hacks-2021_GM479516143.pdfIn PDF document text
    • http://new-era.com.tw/image/data/files/free-candy-decal-roblox_GM431946152.pdfIn PDF document text
    • https://new-era.com.tw/image/data/files/free-cool-roblox-outfits_GM431946152.pdfIn PDF document text
    • https://new-era.com.tw/image/data/files/hack-to-get-levels-in-elemental-wars-on-roblox_GM431946152.pdfIn PDF document text
    • https://new-era.com.tw/image/data/files/is-coin-master-hack-safe_GM406889139.pdfIn PDF document text
    • http://new-era.com.tw/image/data/files/how-to-hack-robux_GM431946152.pdfIn PDF document text
    • http://new-era.com.tw/image/data/files/how-to-hack-a-minecraft-server_GM479516143.pdfIn PDF document text
    • http://new-era.com.tw/image/data/files/free-tiktok-fans-and-likes_GM835599320.pdfIn PDF document text
    • http://new-era.com.tw/image/data/files/how-to-hack-in-to-builder-mans-acount-roblox_GM431946152.pdfIn PDF document text
    • https://new-era.com.tw/image/data/files/tiktok-free-views-apk-download_GM835599320.pdfIn PDF document text
    • http://new-era.com.tw/image/data/files/roblox-assassin_GM431946152.pdfIn PDF document text
    • http://new-era.com.tw/image/data/files/robux-download_GM431946152.pdfIn PDF document text
    • http://new-era.com.tw/image/data/files/coin-master-free-spain_GM406889139.pdfIn PDF document text
    • http://new-era.com.tw/image/data/files/coin-master-400-spin-link-today_GM406889139.pdfIn PDF document text
    • http://new-era.com.tw/image/data/files/codes-in-roblox-free_GM431946152.pdfIn PDF document text
    • http://new-era.com.tw/image/data/files/free-robux-100-real-no-fake-roblox_GM431946152.pdfIn PDF document text
    • http://new-era.com.tw/image/data/files/oprewards-com-login_GM431946152.pdfIn PDF document text
    • https://new-era.com.tw/image/data/files/how-to-start-a-minecraft-server-for-free_GM479516143.pdfIn PDF document text
    • https://new-era.com.tw/image/data/files/roblox-hacks-2021-cheats-exploits_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_off00003261.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3261 22076 bytes
SHA-256: cc21257dd6a2de7c96574bbf6edbfd54cb51f39fa9880efd6317e60c5660db3b
font_01_sfnt_off00006347.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6347 17856 bytes
SHA-256: 3d09237b64d622911723e49166b0cb8d9eb0a72dc71015b79adc0bc2c1efeaa0

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