Malicious PDF — malware analysis report

Static analysis result for SHA-256 0fe0aaca16a32c21…

MALICIOUS

PDF

34.1 KB Created: 2021-06-21 13:30:38 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 4358587031ce63dcab0bd56fa3da6124 SHA-1: fd15cf871322e5094dd2844df0bfccd4497f41f4 SHA-256: 0fe0aaca16a32c21ddbf2d15e1a31ea676bd312091c6f3717a54f41548fafef2
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF document contains a lure related to 'free game hacks' and directs users to a suspicious URL. The presence of embedded links and the ML classifier's high confidence indicate a malicious intent to redirect users to potentially harmful content or initiate a download. No scripts were extracted, but the document structure and heuristics suggest it's designed to exploit user interest in free in-game items.

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/get-roblox-games-for-free-game-hack PDF link annotation
    • https://cosmosocean.com.tw/upload/files/coin-master-daily-free-rewards_GM406889139.pdfIn PDF document text
    • https://cosmosocean.com.tw/upload/files/coinmaster-spin-ml_GM406889139.pdfIn PDF document text
    • https://cosmosocean.com.tw/upload/files/free-printable-minecraft-coloring-pages_GM479516143.pdfIn PDF document text
    • https://cosmosocean.com.tw/upload/files/coin-master-daily-free-spins-and-coins_GM406889139.pdfIn PDF document text
    • https://cosmosocean.com.tw/upload/files/free-stuff-on-roblox_GM431946152.pdfIn PDF document text
    • https://cosmosocean.com.tw/upload/files/is-free-robux-real_GM431946152.pdfIn PDF document text
    • https://cosmosocean.com.tw/upload/files/games-that-give-free-robux-no-password_GM431946152.pdfIn PDF document text
    • https://cosmosocean.com.tw/upload/files/free-minecraft-capes_GM479516143.pdfIn PDF document text
    • https://cosmosocean.com.tw/upload/files/free-fire-coin-master_GM406889139.pdfIn PDF document text
    • https://cosmosocean.com.tw/upload/files/how-to-hack-someones-roblox-account-2021_GM431946152.pdfIn PDF document text
    • https://cosmosocean.com.tw/upload/files/earn-free-robux-for-roblox_GM431946152.pdfIn PDF document text
    • https://cosmosocean.com.tw/upload/files/free-bugatti-roblox_GM431946152.pdfIn PDF document text
    • https://cosmosocean.com.tw/upload/files/ways-to-earn-robux_GM431946152.pdfIn PDF document text
    • https://cosmosocean.com.tw/upload/files/easiest-coin-master-hack_GM406889139.pdfIn PDF document text
    • https://cosmosocean.com.tw/upload/files/roblox-promo-codes-free-robux_GM431946152.pdfIn PDF document text
    • https://cosmosocean.com.tw/upload/files/coin-master-mod_GM406889139.pdfIn PDF document text
    • https://cosmosocean.com.tw/upload/files/free-daily-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://cosmosocean.com.tw/upload/files/vip-roblox-free_GM431946152.pdfIn PDF document text
    • https://cosmosocean.com.tw/upload/files/roblox-site-17-hacker_GM431946152.pdfIn PDF document text
    • https://cosmosocean.com.tw/upload/files/is-minecraft-education-edition-free_GM479516143.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_off00002efa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2EFA 22196 bytes
SHA-256: 0b474124aca6cdce407e5bc4e3b12f72c6a565298d4ba04adc40102f661245b5
font_01_sfnt_off00006035.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6035 19016 bytes
SHA-256: 9ad8c4eb7a3f7be797e9a632f978ffc7477368e79d12c35c28f27e7de0598da1

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