Malicious PDF — malware analysis report

Static analysis result for SHA-256 2bed554aff0ada08…

MALICIOUS

PDF

42.2 KB Created: 2021-05-12 23:18:39 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 57c59b96511d7d208dd3ad0ab59af01c SHA-1: f5b14764f4a509539ab368ab9cccd3562b8fffb5 SHA-256: 2bed554aff0ada082a50859c186c85a1e5368ef48082fe233c1752bb329d4534
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a lure for 'free coins and spins' and links to external URLs, indicating a phishing or scam attempt. The ML classifier strongly flagged this PDF as malicious. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest it's designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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 https://netcdn.xyz/app/406889139/free-coins-and-spins-2021-game-hack PDF link annotation
    • https://cosmosocean.com.tw/upload/files/coin-master-free-spins-link-2021_GM406889139.pdfIn PDF document text
    • https://cosmosocean.com.tw/upload/files/daily-coin-master-free-spin-link_GM406889139.pdfIn PDF document text
    • https://cosmosocean.com.tw/upload/files/free-roblox-followers_GM431946152.pdfIn PDF document text
    • https://cosmosocean.com.tw/upload/files/free-spins-coin-master-apple_GM406889139.pdfIn PDF document text
    • https://cosmosocean.com.tw/upload/files/coin-master-rare-cards-hack_GM406889139.pdfIn PDF document text
    • https://cosmosocean.com.tw/upload/files/sb-game-hacker-coin-master_GM406889139.pdfIn PDF document text
    • https://cosmosocean.com.tw/upload/files/roblox-hack-generator_GM431946152.pdfIn PDF document text
    • https://cosmosocean.com.tw/upload/files/roblox-hack_GM431946152.pdfIn PDF document text
    • https://cosmosocean.com.tw/upload/files/free-minecraft-server_GM479516143.pdfIn PDF document text
    • https://cosmosocean.com.tw/upload/files/roblox-free-clothes-hack_GM431946152.pdfIn PDF document text
    • https://cosmosocean.com.tw/upload/files/www-free-robux-com_GM431946152.pdfIn PDF document text
    • https://cosmosocean.com.tw/upload/files/free-robux-no-human-verification-or-survey-2021_GM431946152.pdfIn PDF document text
    • https://cosmosocean.com.tw/upload/files/how-to-get-free-robux-without-email_GM431946152.pdfIn PDF document text
    • https://cosmosocean.com.tw/upload/files/how-to-get-minecraft-windows-10-edition-for-free_GM479516143.pdfIn PDF document text
    • https://cosmosocean.com.tw/upload/files/coin-master-free-spins-and-coins_GM406889139.pdfIn PDF document text
    • https://cosmosocean.com.tw/upload/files/worst-roblox-avatars_GM431946152.pdfIn PDF document text
    • https://cosmosocean.com.tw/upload/files/roblox-free-clothes-girl_GM431946152.pdfIn PDF document text
    • https://cosmosocean.com.tw/upload/files/how-to-hack-a-roblox-account-2021_GM431946152.pdfIn PDF document text
    • https://cosmosocean.com.tw/upload/files/minecraft-bedrock-hacks_GM479516143.pdfIn PDF document text
    • https://cosmosocean.com.tw/upload/files/how-to-hack-roblox-to-get-robux_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_003_off000049bf.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x49BF 25392 bytes
SHA-256: 7ec642767cf6dc27dec19d49535f3507820cc68f3ac74c8b7548f5f8b7a1cd71
font_01_sfnt_off000082ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x82EA 18128 bytes
SHA-256: 778380711e0f1f4e68bfda34d1f2ae1561ebac5989adfab2cc92020f8920bf0f

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