Malicious PDF — malware analysis report

Static analysis result for SHA-256 b99d58fdf0c2c72c…

MALICIOUS

PDF

35.4 KB Created: 2021-07-03 19:26:57 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-02
MD5: b71363f188a144fd9a982507e91d44d8 SHA-1: dc8db1264f96a4bec9af85a54d40a573f8d322b6 SHA-256: b99d58fdf0c2c72c3b20c6c27bb4be45baa3225823e4f0081bd168494b274bac
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/406889139/free-spins-for-coin-master-without-human-verification-game-hack PDF link annotation
    • https://new-era.com.tw/image/data/files/free-minecraft-bedrock-server-hosting-24-7_GM479516143.pdfIn PDF document text
    • http://new-era.com.tw/image/data/files/100-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://new-era.com.tw/image/data/files/minecraft-pe-texture-packs-free-download_GM479516143.pdfIn PDF document text
    • https://new-era.com.tw/image/data/files/can-i-create-roblox-game-free_GM431946152.pdfIn PDF document text
    • https://new-era.com.tw/image/data/files/minecraft-pe-hacks_GM479516143.pdfIn PDF document text
    • http://new-era.com.tw/image/data/files/coin-master-apk-hack-mod-download_GM406889139.pdfIn PDF document text
    • http://new-era.com.tw/image/data/files/how-to-hack-in-roblox-prison-life_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
    • http://new-era.com.tw/image/data/files/fast-robux-online_GM431946152.pdfIn PDF document text
    • http://new-era.com.tw/image/data/files/minecraft-client_GM479516143.pdfIn PDF document text
    • http://new-era.com.tw/image/data/files/coin-master-hack-ios-apk_GM406889139.pdfIn PDF document text
    • https://new-era.com.tw/image/data/files/coin-master-free-daily-spins-and-coins_GM406889139.pdfIn PDF document text
    • http://new-era.com.tw/image/data/files/free-robux-gift-card-generator_GM431946152.pdfIn PDF document text
    • http://new-era.com.tw/image/data/files/minecraft-java-for-free_GM479516143.pdfIn PDF document text
    • http://new-era.com.tw/image/data/files/wurst-112-2_GM479516143.pdfIn PDF document text
    • https://new-era.com.tw/image/data/files/how-to-hack-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://new-era.com.tw/image/data/files/how-to-download-minecraft-for-free-on-windows_GM479516143.pdfIn PDF document text
    • https://new-era.com.tw/image/data/files/roblox-group-finder-free-download_GM431946152.pdfIn PDF document text
    • http://new-era.com.tw/image/data/files/free-roblox-sound-effects_GM431946152.pdfIn PDF document text
    • https://new-era.com.tw/image/data/files/how-to-change-your-username-on-roblox-for-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_off00003342.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3342 22560 bytes
SHA-256: 6363057b87c3811e8865e85bd1d62a698ee735f87241dfdb0cf715a396ab485b
font_01_sfnt_off000065a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x65A0 19072 bytes
SHA-256: ab456d8fb78f7a75ac8c0c3e18ca03385b605ca6326ff6a6876da9d238efa35b

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