Malicious PDF — malware analysis report

Static analysis result for SHA-256 3332d8f7879c2505…

MALICIOUS

PDF

35.4 KB Created: 2021-06-17 18:47:41 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-17
MD5: ea940f94ca6995b27a5a99ed002abcbc SHA-1: 70e9927ed0e1098720217c3a6510f3e00d9f328a SHA-256: 3332d8f7879c2505a6d1ccf5fe41bef86e7fe797b30bc17bdffc7cb5e202419e
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous links to websites offering game cheats and hacks, such as 'Roblox Money Cheats'. The presence of these lures, combined with the ML classifier flagging the PDF as malicious, indicates a phishing or social engineering attempt. Although no scripts were explicitly extracted, the PDF structure and embedded URLs suggest it is designed to redirect users to potentially malicious download sites.

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/roblox-money-cheats-for-tycoons-game-hack PDF link annotation
    • http://zercalo.org/images/tiktok-free-like_GM835599320.pdfIn PDF document text
    • http://zercalo.org/images/roblox-finak-stand-cheat_GM431946152.pdfIn PDF document text
    • http://zercalo.org/images/free-robux-2021_GM431946152.pdfIn PDF document text
    • http://zercalo.org/images/roblox-executor-free-download_GM431946152.pdfIn PDF document text
    • http://zercalo.org/images/coin-master-hack-version-2021-free-download_GM406889139.pdfIn PDF document text
    • http://zercalo.org/images/free-robux-generator-activation-code_GM431946152.pdfIn PDF document text
    • http://zercalo.org/images/coin-master-free-spins-link_GM406889139.pdfIn PDF document text
    • http://zercalo.org/images/how-to-get-free-spins-on-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://zercalo.org/images/hacks-for-roblox-island-royale-for-bucks_GM431946152.pdfIn PDF document text
    • http://zercalo.org/images/how-do-i-get-free-spins-in-coin-master_GM406889139.pdfIn PDF document text
    • http://zercalo.org/images/free-robux-come_GM431946152.pdfIn PDF document text
    • http://zercalo.org/images/free-spins-and-coins-coin-master_GM406889139.pdfIn PDF document text
    • http://zercalo.org/images/get-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://zercalo.org/images/roblox-glitch-how-to-get-free-clothes-2021_GM431946152.pdfIn PDF document text
    • http://zercalo.org/images/robux-sites_GM431946152.pdfIn PDF document text
    • http://zercalo.org/images/como-hackear-el-juego-coin-master-en-espaol_GM406889139.pdfIn PDF document text
    • http://zercalo.org/images/free-robux-hack-generater_GM431946152.pdfIn PDF document text
    • http://zercalo.org/images/how-to-get-minecraft-java-for-free_GM479516143.pdfIn PDF document text
    • http://zercalo.org/images/roblox-free-hats_GM431946152.pdfIn PDF document text
    • http://zercalo.org/images/toolbox-for-minecraft-pe-ios_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
stream_002_off00003005.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3005 23476 bytes
SHA-256: 868c95ba7d27eeec87588ae145e2264b621efdbb3ea961dee541b6dd345b444f
font_01_sfnt_off0000652d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x652D 19108 bytes
SHA-256: 2ebee2a9da7cbb4ec6ed60d020d593cc20be7a6581ce059671514ed16aee921b

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