Malicious PDF — malware analysis report

Static analysis result for SHA-256 53b7e30e28f23ccf…

MALICIOUS

PDF

34.7 KB Created: 2021-06-27 00:13:57 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-18
MD5: ece00c081f91202029e1c42ba99015fb SHA-1: 8080f1b754de3b61c877757b38ff9095e0ec9c6f SHA-256: 53b7e30e28f23ccf3766dcc62a12a89489525be4f6144ab56a813b5568ff9a5f
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.co/app/431946152/free-robux-minecraft-game-hack PDF link annotation
    • https://smark.com.tw/image/data/files/free-robux-hack-generator_GM431946152.pdfIn PDF document text
    • https://smark.com.tw/image/data/files/get-robux-com_GM431946152.pdfIn PDF document text
    • https://smark.com.tw/image/data/files/free-minecraft-skin-packs_GM479516143.pdfIn PDF document text
    • https://smark.com.tw/image/data/files/coin-master-hack-ios-download-2021_GM406889139.pdfIn PDF document text
    • https://smark.com.tw/image/data/files/minecraft-tower-defense-hacked_GM479516143.pdfIn PDF document text
    • https://smark.com.tw/image/data/files/minecraft-for-free-on-phone_GM479516143.pdfIn PDF document text
    • https://smark.com.tw/image/data/files/cool-tshirts-for-free-roblox_GM431946152.pdfIn PDF document text
    • https://smark.com.tw/image/data/files/roblox-kill-script-hack_GM431946152.pdfIn PDF document text
    • https://smark.com.tw/image/data/files/coin-master-free-coins--spins_GM406889139.pdfIn PDF document text
    • https://smark.com.tw/image/data/files/how-to-get-free-robux-hack-2021_GM431946152.pdfIn PDF document text
    • https://smark.com.tw/image/data/files/is-there-a-way-to-get-free-pokeballs-in-pokemon-go_GM1094591345.pdfIn PDF document text
    • https://smark.com.tw/image/data/files/free-robux-no-password_GM431946152.pdfIn PDF document text
    • https://smark.com.tw/image/data/files/robux-hack-2021-ios_GM431946152.pdfIn PDF document text
    • https://smark.com.tw/image/data/files/oprewards-free-robux_GM431946152.pdfIn PDF document text
    • https://smark.com.tw/image/data/files/can-tiktok-free-view-bot_GM835599320.pdfIn PDF document text
    • https://smark.com.tw/image/data/files/get-me-free-robux_GM431946152.pdfIn PDF document text
    • https://smark.com.tw/image/data/files/roblox-studio-free-robux_GM431946152.pdfIn PDF document text
    • https://smark.com.tw/image/data/files/coin-master-pc-hack-download_GM406889139.pdfIn PDF document text
    • https://smark.com.tw/image/data/files/inappropriate-roblox_GM431946152.pdfIn PDF document text
    • https://smark.com.tw/image/data/files/robux-sites-hacks_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00003056.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3056 22456 bytes
SHA-256: b534e30f5f5422df0e92103bce083b89e6001e391e03d6f4a1213e33ff6ff212
font_01_sfnt_off00006245.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6245 19136 bytes
SHA-256: ed23b6b7e4a00b58453b3f8d4552d7eafbf3069438bf81b76b6e38884d0cbecd

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