Malicious PDF — malware analysis report

Static analysis result for SHA-256 857a5b7217514a6d…

MALICIOUS

PDF

32.8 KB Created: 2021-07-03 15:46:57 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 5eb1b8764f813c0ebcecfb0ee5e7e3d3 SHA-1: 5586a620e1d9a578880018f6a462a6348a0e051a SHA-256: 857a5b7217514a6daa7f420dc79337f91451f0d50e51c7dce95d8c4d3385c72f
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.tw/app/431946152/hack-avatar-game-hack PDF link annotation
    • http://gamardelli.com.br/images/ckfinder/files/how-to-make-a-roblox-thumbnail-for-free_GM431946152.pdfIn PDF document text
    • http://gamardelli.com.br/images/ckfinder/files/hack-to-get-into-vip-room-in-forgotten-world-roblox_GM431946152.pdfIn PDF document text
    • http://gamardelli.com.br/images/ckfinder/files/roblox-system_GM431946152.pdfIn PDF document text
    • http://gamardelli.com.br/images/ckfinder/files/roblox-ghost-hack-download_GM431946152.pdfIn PDF document text
    • http://gamardelli.com.br/images/ckfinder/files/case-clicker-roblox-cheat_GM431946152.pdfIn PDF document text
    • http://gamardelli.com.br/images/ckfinder/files/copy-paste-bin-1million-free-robux-script_GM431946152.pdfIn PDF document text
    • http://gamardelli.com.br/images/ckfinder/files/free-robux-generator-for-roblox-2021_GM431946152.pdfIn PDF document text
    • http://gamardelli.com.br/images/ckfinder/files/how-to-get-minecraft-for-free-on-your-phone_GM479516143.pdfIn PDF document text
    • http://gamardelli.com.br/images/ckfinder/files/coin-master-hack-app-for-iphone_GM406889139.pdfIn PDF document text
    • http://gamardelli.com.br/images/ckfinder/files/how-to-get-more-robux-for-free_GM431946152.pdfIn PDF document text
    • http://gamardelli.com.br/images/ckfinder/files/robux-hack_GM431946152.pdfIn PDF document text
    • http://gamardelli.com.br/images/ckfinder/files/wurst-client-download_GM479516143.pdfIn PDF document text
    • http://gamardelli.com.br/images/ckfinder/files/free-robux-working_GM431946152.pdfIn PDF document text
    • http://gamardelli.com.br/images/ckfinder/files/how-to-get-free-robux-without-installing-anything_GM431946152.pdfIn PDF document text
    • http://gamardelli.com.br/images/ckfinder/files/coin-master-heaven-free-spins_GM406889139.pdfIn PDF document text
    • http://gamardelli.com.br/images/ckfinder/files/roblox-girl-clothes-for-free_GM431946152.pdfIn PDF document text
    • http://gamardelli.com.br/images/ckfinder/files/who-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://gamardelli.com.br/images/ckfinder/files/roblox-cheat-engine-esp_GM431946152.pdfIn PDF document text
    • http://gamardelli.com.br/images/ckfinder/files/spin-coin-master-free_GM406889139.pdfIn PDF document text
    • http://gamardelli.com.br/images/ckfinder/files/coin-master-hacks-for-iphone_GM406889139.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_off00002ea1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2EA1 21360 bytes
SHA-256: 6fdf593b6b1473dd842beb9646c17aed05bb0481579b7994752059cde563336c
font_01_sfnt_off00005d4a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5D4A 18292 bytes
SHA-256: 15fe832cb1a67f8b9b32bd16fa6b944b1b609e54d644db6923f8635996eddc7f

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