Malicious PDF — malware analysis report

Static analysis result for SHA-256 50748423b36af9b4…

MALICIOUS

PDF

35.3 KB Created: 2021-07-04 08:47:43 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: c57e8e1d3b05d1a82c34471ee332ac08 SHA-1: 20fe47ff9d02edf3a33b0430dd5ed6740fe5e796 SHA-256: 50748423b36af9b41d84fd881cce8ea15161f8508ba4f0ebd8a174eb7a9d0bbc
160 Risk Score

Malware Insights

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

The PDF contains multiple links to external websites that are advertised as 'free generators' or 'game hacks' for popular games like Roblox and Coin Master. One of the primary links, http://netcdn.tw/app/431946152/how-to-hack-someones-roblox-account-2021-game-hack, is flagged as a malicious redirector. This indicates a likely attempt to lure users to malicious sites that could distribute malware or conduct phishing attacks.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector critical 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. CRITICAL on its own: the /app/<id>/<slug>-game-hack path shape is unambiguous scam infra, and the host rotates so a host-list match can't be relied on.
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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
  • 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/how-to-hack-someones-roblox-account-2021-game-hack In PDF document text
    • http://en.leechan.com.cn/Public/upload/editorfiles/how-to-get-minecraft-for-free-2021_GM479516143.pdfIn PDF document text
    • http://en.leechan.com.cn/Public/upload/editorfiles/is-roblox-being-hacked-right-now-2021_GM431946152.pdfIn PDF document text
    • http://en.leechan.com.cn/Public/upload/editorfiles/get-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://en.leechan.com.cn/Public/upload/editorfiles/coinmaster-blogspot_GM406889139.pdfIn PDF document text
    • http://en.leechan.com.cn/Public/upload/editorfiles/roblox-hack-2021-free-robux_GM431946152.pdfIn PDF document text
    • http://en.leechan.com.cn/Public/upload/editorfiles/robux-hack-inspect-code_GM431946152.pdfIn PDF document text
    • http://en.leechan.com.cn/Public/upload/editorfiles/does-roblox-use-an-anti-cheat_GM431946152.pdfIn PDF document text
    • http://en.leechan.com.cn/Public/upload/editorfiles/free-robux-generator-without-human-verification_GM431946152.pdfIn PDF document text
    • http://en.leechan.com.cn/Public/upload/editorfiles/robuxy-com-free-robux_GM431946152.pdfIn PDF document text
    • http://en.leechan.com.cn/Public/upload/editorfiles/roblox-free-pacages_GM431946152.pdfIn PDF document text
    • http://en.leechan.com.cn/Public/upload/editorfiles/coin-master-coins_GM406889139.pdfIn PDF document text
    • http://en.leechan.com.cn/Public/upload/editorfiles/free-tiktok-followers-generator-no-human-verification_GM835599320.pdfIn PDF document text
    • http://en.leechan.com.cn/Public/upload/editorfiles/fbchampion_GM406889139.pdfIn PDF document text
    • http://en.leechan.com.cn/Public/upload/editorfiles/minecraft-login-free_GM479516143.pdfIn PDF document text
    • http://en.leechan.com.cn/Public/upload/editorfiles/robux-game-com_GM431946152.pdfIn PDF document text
    • http://en.leechan.com.cn/Public/upload/editorfiles/coin-master-hack-spin-generator-tool_GM406889139.pdfIn PDF document text
    • http://en.leechan.com.cn/Public/upload/editorfiles/coin-master-free-coins-and-spins-daily_GM406889139.pdfIn PDF document text
    • http://en.leechan.com.cn/Public/upload/editorfiles/play-roblox-free-online-login_GM431946152.pdfIn PDF document text
    • http://en.leechan.com.cn/Public/upload/editorfiles/coin-master-free-stuff_GM406889139.pdfIn PDF document text
    • http://en.leechan.com.cn/Public/upload/editorfiles/how-to-make-a-group-for-free-on-roblox-2021_GM431946152.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_off0000314d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x314D 22332 bytes
SHA-256: c97cf16ad9952571606089f5161a48338f57768807358cb631055094e8423eaf
font_01_sfnt_off000062ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x62EA 19724 bytes
SHA-256: f50c412bcfe1d1f98486a75b2c7138549e2bea37deae9173a274dae717afecb9

Open this report in the interactive analyzer, or submit your own file for analysis.