Malicious PDF — malware analysis report

Static analysis result for SHA-256 2132cd139291613a…

MALICIOUS

PDF

34.7 KB Created: 2021-07-09 03:51:58 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: a8fc6c9debbd50195a169792668fe744 SHA-1: 8e1c618ef5f7130599333c26c283a123fa192c88 SHA-256: 2132cd139291613a38da0396b7e1a25ef95770b17103efb8d41b67da06754ba0
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains invisible links that lead to CAPTCHA-themed lures, suggesting an attempt to trick users into downloading further malicious content. The presence of multiple URLs related to game cheats and virtual currency, combined with a visual download button lure, indicates a social engineering tactic to entice users to click on malicious links. The ML classifier also strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 4

  • Invisible PDF links to CAPTCHA-themed web lure high PDF_CAPTCHA_LINK_LURE
    PDF contains invisible clickable link annotations that point to a CAPTCHA/capcha-themed web path. This is a common phishing and ClickFix-style routing pattern: the PDF itself is inert, while the linked page performs the credential prompt or fake verification.
  • 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/406889139/hack-master-coin-pc-game-hack
    • http://lib.smklabor.sch.id/repository/roblox-how-to-get-free-robux-tips_GM431946152.pdf
    • http://lib.smklabor.sch.id/repository/how-to-get-free-robux-ipad-2021_GM431946152.pdf
    • http://lib.smklabor.sch.id/repository/dragon-ball-rage-roblox-hack-tools_GM431946152.pdf
    • http://lib.smklabor.sch.id/repository/coin-master-free-coins_GM406889139.pdf
    • http://lib.smklabor.sch.id/repository/free-robux-videos_GM431946152.pdf
    • http://lib.smklabor.sch.id/repository/free-robux-rewards_GM431946152.pdf
    • http://lib.smklabor.sch.id/repository/free-cash-script-ultimate-driving-roblox-pastebin_GM431946152.pdf
    • http://lib.smklabor.sch.id/repository/fb-coin-master-free-spins-link_GM406889139.pdf
    • http://lib.smklabor.sch.id/repository/https-webrobloxcom-games-2021202177-creeperawwman14-hack_GM431946152.pdf
    • http://lib.smklabor.sch.id/repository/free-coin-master-spins_GM406889139.pdf
    • http://lib.smklabor.sch.id/repository/how-do-u-get-free-builders-club-on-roblox_GM431946152.pdf
    • http://lib.smklabor.sch.id/repository/sword-fighting-roblox-hack_GM431946152.pdf
    • http://lib.smklabor.sch.id/repository/robux-hack-reddit_GM431946152.pdf
    • http://lib.smklabor.sch.id/repository/how-to-get-roblox-animations-for-free_GM431946152.pdf
    • http://lib.smklabor.sch.id/repository/free-robux-captcha_GM431946152.pdf
    • http://lib.smklabor.sch.id/repository/free-robux-generator-codes_GM431946152.pdf
    • http://lib.smklabor.sch.id/repository/free-minecraft-premium-account_GM479516143.pdf
    • http://lib.smklabor.sch.id/repository/com-roblox_GM431946152.pdf
    • http://lib.smklabor.sch.id/repository/get-anything-for-free-on-roblox_GM431946152.pdf
    • http://lib.smklabor.sch.id/repository/hack-coins-pizzeria-roleplay-remastered-roblox-v3rmillion_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000031b5.bin
51499af42e903a22e4864648dd7b39d733d65356c7c202165549b33fcdcffe84		 pdf-font-stream PDF embedded font (sfnt) at offset 0x31B5 23044 bytes
font_01_sfnt_off00006541.bin
7bf7a713ea91c310d3ed9cfc8f1621760a7c258ca2549003d87af9448f5c7a9d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6541 18160 bytes

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