Malicious PDF — malware analysis report

Static analysis result for SHA-256 0cc095d7de3c053c…

MALICIOUS

PDF

34.0 KB Created: 2021-06-18 04:03:34 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 5e285d49f3e500f640664f57a455b0aa SHA-1: b1d89baed0dd491f1ad249d6740fb1872adc3769 SHA-256: 0cc095d7de3c053c0902bad41b6eb22d58fdacd338f90349b10e43965faec7a6
142 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains numerous invisible links and embedded URLs that lead to external websites, many of which are related to game hacks and free in-game items. The heuristic firings indicate a link farm designed to lure users to potentially malicious sites, possibly for phishing or to download further malware. The presence of CAPTCHA-themed lures suggests an attempt to bypass security measures or trick users into completing verification steps.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9824

Heuristics 5

  • 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.
  • 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.co/app/431946152/how-to-get-a-free-skin-in-strucid-roblox-game-hack
    • https://acode.com.br/wp-content/uploads/fsqm-files/how-to-hack-roblox-jailbreak-money-with-cheat-engine_GM431946152.pdf
    • https://acode.com.br/wp-content/uploads/fsqm-files/how-do-u-get-free-robux-2021_GM431946152.pdf
    • https://acode.com.br/wp-content/uploads/fsqm-files/is-tiktok-free_GM835599320.pdf
    • https://acode.com.br/wp-content/uploads/fsqm-files/watch-a-video-for-free-robux_GM431946152.pdf
    • https://acode.com.br/wp-content/uploads/fsqm-files/free-robux-with-recapcha_GM431946152.pdf
    • https://acode.com.br/wp-content/uploads/fsqm-files/how-to-get-free-robux-2021-easy_GM431946152.pdf
    • https://acode.com.br/wp-content/uploads/fsqm-files/how-to-hack-someone-roblox-2021_GM431946152.pdf
    • https://acode.com.br/wp-content/uploads/fsqm-files/how-to-get-free-robux-no-verify_GM431946152.pdf
    • https://acode.com.br/wp-content/uploads/fsqm-files/hack-robar-cuentas-de-roblox-2021-akakaa_GM431946152.pdf
    • https://acode.com.br/wp-content/uploads/fsqm-files/how-to-get-free-admin-in-any-roblox-game-2021_GM431946152.pdf
    • https://acode.com.br/wp-content/uploads/fsqm-files/how-to-use-chatbot-hack-roblox-not-working_GM431946152.pdf
    • https://acode.com.br/wp-content/uploads/fsqm-files/how-do-you-hack-a-server-on-roblox_GM431946152.pdf
    • https://acode.com.br/wp-content/uploads/fsqm-files/justnow-freerobuxcodes2021working_GM431946152.pdf
    • https://acode.com.br/wp-content/uploads/fsqm-files/como-conseguir-robux-con-hacks_GM431946152.pdf
    • https://acode.com.br/wp-content/uploads/fsqm-files/is-hacking-illegal-in-roblox_GM431946152.pdf
    • https://acode.com.br/wp-content/uploads/fsqm-files/minecraft-free-trial_GM479516143.pdf
    • https://acode.com.br/wp-content/uploads/fsqm-files/roblox-hack-peoples-robux_GM431946152.pdf
    • https://acode.com.br/wp-content/uploads/fsqm-files/mining-simulator-hack-roblox_GM431946152.pdf
    • https://acode.com.br/wp-content/uploads/fsqm-files/free-roblox-codes-may-2021_GM431946152.pdf
    • https://acode.com.br/wp-content/uploads/fsqm-files/i-got-hacked-on-roblox_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_001_off00002cd2.bin
4e52d97ae1ed7268f9cda720c4f7148d9eb40c70a561268546e27e4a78e9c47c		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x2CD2 22588 bytes
font_01_sfnt_off00005f59.bin
45eb6ded327e0d16f2676a4d6fe31c07619da788aa0e7a88c7172587ec677bed		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5F59 19336 bytes

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