Malicious PDF — malware analysis report

Static analysis result for SHA-256 7921b08cd212b106…

MALICIOUS

PDF

33.9 KB Created: 2021-06-20 11:05:50 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 28207cfd7a0a3634d57c3745539fcdc3 SHA-1: a12c7abbf6aae250ee792930d5b0beecf8c4da83 SHA-256: 7921b08cd212b106c0b630b6881a1c5b7a71561d97e1f4c95c2074f1c2ba2f2b
102 Risk Score

Malware Insights

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

The PDF document contains a large number of external links, many of which are SEO-optimized and point to pages offering game hacks and cheats. The ML classifier strongly flagged this PDF as malicious, and the presence of numerous external URIs suggests an attempt to redirect users to malicious content or download sites. The document body, though partially garbled, contains references to game hacks and a URL that likely serves as a download entry point.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 4

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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/star-code-roblox-free-game-hack
    • http://huounaixunghe.com/images/free-robux-glitch-no-hack_GM431946152.pdf
    • http://huounaixunghe.com/images/hacks-to-get-free-robux_GM431946152.pdf
    • http://huounaixunghe.com/images/coin-master-hack-apk-iphone_GM406889139.pdf
    • http://huounaixunghe.com/images/how-to-hack-roblox-games_GM431946152.pdf
    • http://huounaixunghe.com/images/como-descargar-hack-para-matar-en-roblox_GM431946152.pdf
    • http://huounaixunghe.com/images/coin-master-spin-hack-pc_GM406889139.pdf
    • http://huounaixunghe.com/images/minecraft-classic-free_GM479516143.pdf
    • http://huounaixunghe.com/images/how-to-buy-free-robux-for-money_GM431946152.pdf
    • http://huounaixunghe.com/images/play-minecraft-pocket-edition-for-free_GM479516143.pdf
    • http://huounaixunghe.com/images/free-spins-on-coin-master-link_GM406889139.pdf
    • http://huounaixunghe.com/images/coin-master-free-spins-for-today_GM406889139.pdf
    • http://huounaixunghe.com/images/coin-master-free-cards-hack_GM406889139.pdf
    • http://huounaixunghe.com/images/pixies-gigantic-coin-master-free-spins-and-coins_GM406889139.pdf
    • http://huounaixunghe.com/images/tiktok-free-fans_GM835599320.pdf
    • http://huounaixunghe.com/images/coin-master-hack-review_GM406889139.pdf
    • http://huounaixunghe.com/images/free-robux-no-verification-needed_GM431946152.pdf
    • http://huounaixunghe.com/images/roblox-ballon-simolator-gem-hack_GM431946152.pdf
    • http://huounaixunghe.com/images/coin-master-50-spin-link_GM406889139.pdf
    • http://huounaixunghe.com/images/how-to-hack-robux-on-roblox-mobile_GM431946152.pdf
    • http://huounaixunghe.com/images/roblox-island-royale-hacks_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002fb0.bin
87544421207678673f47e11c822bddb8578408ad0812d36317846f15839de9f9
pdf-font-stream PDF embedded font (sfnt) at offset 0x2FB0 21816 bytes
font_01_sfnt_off00005f9a.bin
42832be2a8122e965a5a76a0535e62e64916c809bf681a673fb333229b5a1a5f
pdf-font-stream PDF embedded font (sfnt) at offset 0x5F9A 18928 bytes