Malicious PDF — malware analysis report

Static analysis result for SHA-256 140998321186296a…

MALICIOUS

PDF

35.5 KB Created: 2021-06-26 10:26:10 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 56f3857544d276ebb28a3e2c110df7c5 SHA-1: 0a78ff569558ce12045c541a193d281805fba14b SHA-256: 140998321186296aed1b1333a090f96f8c7288e24ece5405640c882b53206896
82 Risk Score

Malware Insights

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

The document uses lures related to free Robux and game hacks to entice users to click on embedded malicious URLs. The presence of a 'Password-protected archive handoff' heuristic suggests that the user is expected to download an archive which may contain the actual malware, requiring a password provided within the document to decrypt it. The ML classifier strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 4

  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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/free-robux-hack-2021-pastebin-game-hack
    • http://elibrary.smknesbu.sch.id/repository/how-to-get-doge-hat-for-free-on-roblox_GM431946152.pdf
    • http://elibrary.smknesbu.sch.id/repository/roblox-cheat-engine-high-jump_GM431946152.pdf
    • http://elibrary.smknesbu.sch.id/repository/how-do-you-get-roblox-for-free_GM431946152.pdf
    • http://elibrary.smknesbu.sch.id/repository/roblox-smoking-free_GM431946152.pdf
    • http://elibrary.smknesbu.sch.id/repository/coin-master-hack-without-verification-2021_GM406889139.pdf
    • http://elibrary.smknesbu.sch.id/repository/how-do-u-get-free-robux-2021_GM431946152.pdf
    • http://elibrary.smknesbu.sch.id/repository/roblox-accounts-for-sale-free_GM431946152.pdf
    • http://elibrary.smknesbu.sch.id/repository/blogspot-free-spins-coin-master_GM406889139.pdf
    • http://elibrary.smknesbu.sch.id/repository/script-to-get-any-ite-in-roblox-catalog-free_GM431946152.pdf
    • http://elibrary.smknesbu.sch.id/repository/today-coin-master-free-coins-link_GM406889139.pdf
    • http://elibrary.smknesbu.sch.id/repository/how-to-get-robux-fast-no-hack-2021_GM431946152.pdf
    • http://elibrary.smknesbu.sch.id/repository/roblox-hack-script-admin_GM431946152.pdf
    • http://elibrary.smknesbu.sch.id/repository/hack-roblox-ultimate-driving_GM431946152.pdf
    • http://elibrary.smknesbu.sch.id/repository/legit-coin-master-hack_GM406889139.pdf
    • http://elibrary.smknesbu.sch.id/repository/blockzone-site-free-robux_GM431946152.pdf
    • http://elibrary.smknesbu.sch.id/repository/roblox-hack-week-2021_GM431946152.pdf
    • http://elibrary.smknesbu.sch.id/repository/you-promised-my-son-free-robux_GM431946152.pdf
    • http://elibrary.smknesbu.sch.id/repository/free-spins-coin-master-twitter_GM406889139.pdf
    • http://elibrary.smknesbu.sch.id/repository/free-robux-without-password-website_GM431946152.pdf
    • http://elibrary.smknesbu.sch.id/repository/siren-hack-roblox_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00003205.bin
c8fca8c94d5db3f8ecff3e200f2e41fc396c37042da9cc004362adc43b9347a3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x3205 22348 bytes
font_01_sfnt_off000063c8.bin
0c018a2a755c6ea3b84bcad43cc4d6e513b86b628f86e9ee7bfe64bcb323731a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x63C8 19664 bytes

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