Malicious PDF — malware analysis report

Static analysis result for SHA-256 4fa408dd2c8cfef9…

MALICIOUS

PDF

34.5 KB Created: 2021-07-04 11:50:28 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 46965510cbb65e1e95b0e2a698db6ab4 SHA-1: 13f8e3994e2b3746e40b820fed0dcfd9257008f0 SHA-256: 4fa408dd2c8cfef9cd396e9f056e32dfd7191f96893985bda4c932c2e3347911
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/431946152/free-roblox-executor-game-hack PDF link annotation
    • http://new-era.com.tw/image/data/files/how-to-get-robux-easy_GM431946152.pdfIn PDF document text
    • http://new-era.com.tw/image/data/files/roblox-mobile-hack_GM431946152.pdfIn PDF document text
    • https://new-era.com.tw/image/data/files/minecraft-sign-up-free_GM479516143.pdfIn PDF document text
    • http://new-era.com.tw/image/data/files/free-spin-link-coin-master_GM406889139.pdfIn PDF document text
    • https://new-era.com.tw/image/data/files/80-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://new-era.com.tw/image/data/files/spins-for-coin-master_GM406889139.pdfIn PDF document text
    • https://new-era.com.tw/image/data/files/pokemon-go-free-online_GM1094591345.pdfIn PDF document text
    • http://new-era.com.tw/image/data/files/add-robux-for-free_GM431946152.pdfIn PDF document text
    • https://new-era.com.tw/image/data/files/promo-codes-roblox-robux-free_GM431946152.pdfIn PDF document text
    • http://new-era.com.tw/image/data/files/roblox-cheat-engine-hacks-jailbreak_GM431946152.pdfIn PDF document text
    • https://new-era.com.tw/image/data/files/how-to-get-free-roblox-game-passes-2021_GM431946152.pdfIn PDF document text
    • http://new-era.com.tw/image/data/files/how-to-hack-robux-with-cheat-engine-64-2021_GM431946152.pdfIn PDF document text
    • http://new-era.com.tw/image/data/files/roblox-hack-robux-download-android_GM431946152.pdfIn PDF document text
    • http://new-era.com.tw/image/data/files/master-coin-free-spin_GM406889139.pdfIn PDF document text
    • http://new-era.com.tw/image/data/files/robuxmatchcom-free-robux_GM431946152.pdfIn PDF document text
    • http://new-era.com.tw/image/data/files/how-to-hack-a-minecraft-server-and-make-yourself-op_GM479516143.pdfIn PDF document text
    • http://new-era.com.tw/image/data/files/software-for-cheat-engin-66-to-not-make-roblox-carsh_GM431946152.pdfIn PDF document text
    • https://new-era.com.tw/image/data/files/free-tiktok-video_GM835599320.pdfIn PDF document text
    • http://new-era.com.tw/image/data/files/coin-master-hack-no-survey-or-verification_GM406889139.pdfIn PDF document text
    • https://new-era.com.tw/image/data/files/free-headless-head-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_off00002f61.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F61 22644 bytes
SHA-256: 044f4244dc516e5ed85c562db28efdadbcfe480a6ab1bf4a5e7f73e168ef0b2a
font_01_sfnt_off00006225.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6225 18896 bytes
SHA-256: 3b19af6b5ded182f4e9457a38b804eaf1e4f69130259631d736f6f85c05e9c55

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