Malicious PDF — malware analysis report

Static analysis result for SHA-256 560697e942a6a123…

MALICIOUS

PDF

34.5 KB Created: 2021-06-19 15:58:08 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 5fb632606e31d888a7ca2fc147c22b0b SHA-1: fcb987cfd1b63c20f3e19cc286d19e94b8ef5cb3 SHA-256: 560697e942a6a123f171f9abc10cad8465485bb0557c93e6cd4cfb59ef355925
82 Risk Score

Malware Insights

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

The PDF document uses a lure related to game hacks and free generators to trick users into clicking a link. The primary link, http://netcdn.co/app/431946152/how-to-install-anti-hack-for-roblox-game-hack, is associated with a high-risk heuristic indicating a game hack redirector. The ML classifier also flagged this PDF as malicious with high confidence. While no scripts were explicitly extracted, the nature of the lure suggests it's designed to lead to a malicious download or exploit.

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/how-to-install-anti-hack-for-roblox-game-hack PDF link annotation
    • https://www.dahu-villa.com.tw/upload/files/coin-master-free-spins-a2z-help_GM406889139.pdfIn PDF document text
    • https://www.dahu-villa.com.tw/upload/files/coin-master-free-daily-spins_GM406889139.pdfIn PDF document text
    • https://www.dahu-villa.com.tw/upload/files/hacks-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://www.dahu-villa.com.tw/upload/files/minecraft-download-free-download_GM479516143.pdfIn PDF document text
    • https://www.dahu-villa.com.tw/upload/files/minecraft-bedrock-hacks_GM479516143.pdfIn PDF document text
    • https://www.dahu-villa.com.tw/upload/files/how-to-get-minecraft-realms-for-free_GM479516143.pdfIn PDF document text
    • https://www.dahu-villa.com.tw/upload/files/free-coin-master-spins-for-today_GM406889139.pdfIn PDF document text
    • https://www.dahu-villa.com.tw/upload/files/coin-master-free-spin-sites_GM406889139.pdfIn PDF document text
    • https://www.dahu-villa.com.tw/upload/files/free-roblox-outfits-2021_GM431946152.pdfIn PDF document text
    • https://www.dahu-villa.com.tw/upload/files/get-robux-now_GM431946152.pdfIn PDF document text
    • https://www.dahu-villa.com.tw/upload/files/can-you-hack-coin-master_GM406889139.pdfIn PDF document text
    • https://www.dahu-villa.com.tw/upload/files/coin-master-free-spins-link-june-2021_GM406889139.pdfIn PDF document text
    • https://www.dahu-villa.com.tw/upload/files/como-hackear-coin-master-ios_GM406889139.pdfIn PDF document text
    • https://www.dahu-villa.com.tw/upload/files/free-disney-plus-accounts-tiktok_GM835599320.pdfIn PDF document text
    • https://www.dahu-villa.com.tw/upload/files/free-robux-2021_GM431946152.pdfIn PDF document text
    • https://www.dahu-villa.com.tw/upload/files/roblox-prison-life-hack-2021-deutsch_GM431946152.pdfIn PDF document text
    • https://www.dahu-villa.com.tw/upload/files/minecraft-account-hacked_GM479516143.pdfIn PDF document text
    • https://www.dahu-villa.com.tw/upload/files/free-spins-on-coin-master-hack_GM406889139.pdfIn PDF document text
    • https://www.dahu-villa.com.tw/upload/files/free-robux-no-verification_GM431946152.pdfIn PDF document text
    • https://www.dahu-villa.com.tw/upload/files/claim-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
font_00_sfnt_off0000303c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x303C 22240 bytes
SHA-256: c608462280e06c9b2131a4f3e5d29f96e3756f0c977f35e924aff5cad5ddfc2c
font_01_sfnt_off0000615c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x615C 19208 bytes
SHA-256: ded14c2c1e1879c80c0150bedd8fee1d0d72d9344a0b3dde3d8dc82491d23218