Malicious PDF — malware analysis report

Static analysis result for SHA-256 2ca8a4704cf3953c…

MALICIOUS

PDF

35.9 KB Created: 2021-06-28 08:33:52 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 76eaea2da6fdc4480c20ae245e3cdeaa SHA-1: fd573f9463053837c1713eac75a9b82145171d1e SHA-256: 2ca8a4704cf3953c3a94a0a72ce85c68d7b8f09115feed5266a311825f240def
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a lure related to 'free Robux' and 'game hacks', directing users to a suspicious URL. The ML classifier strongly flagged this PDF as malicious. While no scripts were explicitly extracted, the embedded URL and the nature of the lure suggest an attempt to redirect users to a site that likely hosts further malicious content or exploits.

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/youyube-how-to-get-free-robux-that-working-game-hack PDF link annotation
    • https://new-era.com.tw/image/data/files/daily-free-coin-and-spin-link-for-coin-master_GM406889139.pdfIn PDF document text
    • https://new-era.com.tw/image/data/files/hacking-cite-for-roblox_GM431946152.pdfIn PDF document text
    • https://new-era.com.tw/image/data/files/free-coins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://new-era.com.tw/image/data/files/roblox-group-admin-hack_GM431946152.pdfIn PDF document text
    • https://new-era.com.tw/image/data/files/how-to-hack-grand-blox-auto-on-roblox_GM431946152.pdfIn PDF document text
    • http://new-era.com.tw/image/data/files/coin-master-hack-without-human-verification-2021_GM406889139.pdfIn PDF document text
    • https://new-era.com.tw/image/data/files/coin-master-15-free-spin-link-of-last-5-days_GM406889139.pdfIn PDF document text
    • https://new-era.com.tw/image/data/files/bloxburg-hacks-roblox_GM431946152.pdfIn PDF document text
    • http://new-era.com.tw/image/data/files/coin-master-free-spins-2021-haktuts_GM406889139.pdfIn PDF document text
    • http://new-era.com.tw/image/data/files/coin-master-online-hack-tool_GM406889139.pdfIn PDF document text
    • https://new-era.com.tw/image/data/files/www-roblox-com-free-robux_GM431946152.pdfIn PDF document text
    • http://new-era.com.tw/image/data/files/roblox-pajamas-for-boys-free-shipping_GM431946152.pdfIn PDF document text
    • https://new-era.com.tw/image/data/files/how-can-i-get-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://new-era.com.tw/image/data/files/roblox-ip-tracker-hack_GM431946152.pdfIn PDF document text
    • http://new-era.com.tw/image/data/files/without-pokemon-go-free-incense_GM1094591345.pdfIn PDF document text
    • https://new-era.com.tw/image/data/files/minecraft-free-unblocked_GM479516143.pdfIn PDF document text
    • https://new-era.com.tw/image/data/files/free-robux_GM431946152.pdfIn PDF document text
    • https://new-era.com.tw/image/data/files/coin-master-free-spins-2021-link_GM406889139.pdfIn PDF document text
    • http://new-era.com.tw/image/data/files/coinmasterfree_GM406889139.pdfIn PDF document text
    • https://new-era.com.tw/image/data/files/roblox-is-it-free_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_off0000327e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x327E 22472 bytes
SHA-256: 2998d6abde864312f6f4925d2adc85dac166537416cea0abdca0b01d0d9d9463
font_01_sfnt_off000064a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x64A3 19980 bytes
SHA-256: 6dbd8cf805647ad05013dcebe5674d724c7390864de4ee4f8c3e291c74cd18c0

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