Malicious PDF — malware analysis report

Static analysis result for SHA-256 bc21bb96bd981ede…

MALICIOUS

PDF

34.6 KB Created: 2021-06-27 22:58:36 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 8309c326bc538b80f0cee8e251dcdcf4 SHA-1: 97ffcc7508466a132752d6eff66b80ce09b9d6b7 SHA-256: bc21bb96bd981ede2e1b573e2d8f47178fdf57fcbb70bd4f0967c6687451feaf
102 Risk Score

Malware Insights

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

The PDF document contains numerous embedded links and a prominent URL, all related to game hacks and cheats, suggesting a lure for users seeking unauthorized advantages. The heuristic firings indicate a high likelihood of malicious intent, with the ML classifier assigning a score of 0.998. The document's structure and content strongly suggest it is designed to redirect users to potentially harmful websites or downloaders.

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/hack-roblox-robux-2021-game-hack
    • https://www.hearcolors.com.mx/img/blog/files/how-to-get-minecraft-bedrock-for-free_GM479516143.pdf
    • https://www.hearcolors.com.mx/img/blog/files/free-robux-that-actually-works-2021_GM431946152.pdf
    • https://www.hearcolors.com.mx/img/blog/files/free-robux-no-human-verify_GM431946152.pdf
    • https://www.hearcolors.com.mx/img/blog/files/coin-master-time-speed-hack_GM406889139.pdf
    • https://www.hearcolors.com.mx/img/blog/files/free-spin-coin-master-twitter_GM406889139.pdf
    • https://www.hearcolors.com.mx/img/blog/files/why-is-it-so-easy-to-hack-roblox_GM431946152.pdf
    • https://www.hearcolors.com.mx/img/blog/files/free-robux-generator-no-human-verification-2021_GM431946152.pdf
    • https://www.hearcolors.com.mx/img/blog/files/free-robux-generator-100-working_GM431946152.pdf
    • https://www.hearcolors.com.mx/img/blog/files/how-to-get-java-minecraft-free_GM479516143.pdf
    • https://www.hearcolors.com.mx/img/blog/files/robux-free-online_GM431946152.pdf
    • https://www.hearcolors.com.mx/img/blog/files/shark-attacke-roblox-hack_GM431946152.pdf
    • https://www.hearcolors.com.mx/img/blog/files/blogspot-coin-master-free-spins_GM406889139.pdf
    • https://www.hearcolors.com.mx/img/blog/files/how-to-get-free-coins-on-coin-master_GM406889139.pdf
    • https://www.hearcolors.com.mx/img/blog/files/free-minecraft-mods_GM479516143.pdf
    • https://www.hearcolors.com.mx/img/blog/files/assassin-roblox-cheats_GM431946152.pdf
    • https://www.hearcolors.com.mx/img/blog/files/coin-master-400-spin-link-today_GM406889139.pdf
    • https://www.hearcolors.com.mx/img/blog/files/how-to-get-free-robux-game-test_GM431946152.pdf
    • https://www.hearcolors.com.mx/img/blog/files/roblox-c9m_GM431946152.pdf
    • https://www.hearcolors.com.mx/img/blog/files/free-robux-generator-2021-no-human-verification_GM431946152.pdf
    • https://www.hearcolors.com.mx/img/blog/files/how-to-get-free-robux-without-downloading-apps_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00003034.bin
9040f271b32c248e505da241b4c0fb02fa6cc5d84deb1d9cc91ec55ca4f96bd2
pdf-font-stream PDF embedded font (sfnt) at offset 0x3034 22124 bytes
font_01_sfnt_off0000616c.bin
cec4b1010b4305759620240e00d80edf8ce1abe0c0f0a9cf9395f2cbcb44103e
pdf-font-stream PDF embedded font (sfnt) at offset 0x616C 19200 bytes