Malicious PDF — malware analysis report

Static analysis result for SHA-256 63d3e52f8cb9c77d…

MALICIOUS

PDF

33.8 KB Created: 2021-07-08 08:10:47 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 84b2ecd219a74ddfb7cd7e455d350cbd SHA-1: acf66ca455e7d77e6acc5a4be236f3a071974e2b SHA-256: 63d3e52f8cb9c77d6d641f8ca486df4a80d13d63c2bc8a1cb695393071155cd4
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links and a lure related to game hacks and free currency, strongly suggesting a social engineering tactic to trick users into downloading malicious content. The ML classifier also flagged this PDF as malicious with high confidence. No scripts were extracted, but the embedded URLs are the primary indicators of malicious intent.

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/free-coins-coin-master-blog-game-hack PDF link annotation
    • https://tecturatw.com/image/data/files/roblox-free-draw_GM431946152.pdfIn PDF document text
    • https://tecturatw.com/image/data/files/download-synapse-x-roblox-free_GM431946152.pdfIn PDF document text
    • https://tecturatw.com/image/data/files/free-robux-generator-2021_GM431946152.pdfIn PDF document text
    • https://tecturatw.com/image/data/files/roblox-update-download-free_GM431946152.pdfIn PDF document text
    • https://tecturatw.com/image/data/files/114-4-hacks_GM479516143.pdfIn PDF document text
    • https://tecturatw.com/image/data/files/coin-master-hoe-to-get-extra-free-spins_GM406889139.pdfIn PDF document text
    • https://tecturatw.com/image/data/files/spin-coin-master-free_GM406889139.pdfIn PDF document text
    • https://tecturatw.com/image/data/files/how-to-get-omega-super-saiyan-roblox-for-free_GM431946152.pdfIn PDF document text
    • https://tecturatw.com/image/data/files/mcpe-optifine_GM479516143.pdfIn PDF document text
    • https://tecturatw.com/image/data/files/como-descargar-coin-master-hackeado_GM406889139.pdfIn PDF document text
    • https://tecturatw.com/image/data/files/can-i-get-minecraft-for-free_GM479516143.pdfIn PDF document text
    • https://tecturatw.com/image/data/files/coin-master-hack-version-download_GM406889139.pdfIn PDF document text
    • https://tecturatw.com/image/data/files/roblox-hack-download-pc_GM431946152.pdfIn PDF document text
    • https://tecturatw.com/image/data/files/roblox-build-a-boat-for-treasure-hack-download_GM431946152.pdfIn PDF document text
    • https://tecturatw.com/image/data/files/how-to-enter-cheat-codes-on-roblox_GM431946152.pdfIn PDF document text
    • https://tecturatw.com/image/data/files/free-robux-mr-robux_GM431946152.pdfIn PDF document text
    • https://tecturatw.com/image/data/files/free-links-coin-master_GM406889139.pdfIn PDF document text
    • https://tecturatw.com/image/data/files/free-game-packs-for-coin-master_GM406889139.pdfIn PDF document text
    • https://tecturatw.com/image/data/files/how-to-get-the-catalog-free-in-roblox_GM431946152.pdfIn PDF document text
    • https://tecturatw.com/image/data/files/how-to-hack-people-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
stream_002_off00002e1c.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x2E1C 22772 bytes
SHA-256: c0a3e27383bb22d1a80b2ecd2474b479a9cef59f881ac577f9067e80440fbf52
font_01_sfnt_off0000615d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x615D 18288 bytes
SHA-256: 4d8a9a5f845e6a4543ff8d893a9e279bb8bc764ff82ea70c3d9fb3020af74c46

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