Malicious PDF — malware analysis report

Static analysis result for SHA-256 902ad4c72eb8013d…

MALICIOUS

PDF

33.7 KB Created: 2021-07-01 19:29:00 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 3e65255718d3b1aaf890a445b709d0df SHA-1: 6b1ea0a2efdc9cd227935b018d14447ec4ff12d0 SHA-256: 902ad4c72eb8013dc0d86deda2b732406059cce1178884266972ff93aee5b8fa
82 Risk Score

Malware Insights

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

The PDF document contains multiple embedded URLs and a call-to-action phrase, suggesting it is designed to trick users into downloading malicious content. The heuristic 'SE_PASSWORD_ARCHIVE_LURE' indicates that the document may be instructing users to provide a password for an archive, a common tactic to bypass security scanning. The ML classifier also 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/how-to-sell-a-free-shirt-roblox-game-hack
    • http://library.ulb.ac.id/repository/roblox-asset-download-for-t-shirt-template-free_GM431946152.pdf
    • http://library.ulb.ac.id/repository/hacker-game-in-roblox_GM431946152.pdf
    • http://library.ulb.ac.id/repository/download-roblox-hack-v6-5_GM431946152.pdf
    • http://library.ulb.ac.id/repository/free-robux-quiz_GM431946152.pdf
    • http://library.ulb.ac.id/repository/free-clothing-on-roblox_GM431946152.pdf
    • http://library.ulb.ac.id//repository/roblox-lawsuit_GM431946152.pdf
    • http://library.ulb.ac.id//repository/free-coin-master-spins-blog_GM406889139.pdf
    • http://library.ulb.ac.id/repository/roblox-paid-hack_GM431946152.pdf
    • http://library.ulb.ac.id/repository/roblox-vip-servers-for-free_GM431946152.pdf
    • http://library.ulb.ac.id/repository/coin-master-hack-apk-facebook-login_GM406889139.pdf
    • http://library.ulb.ac.id/repository/how-to-get-free-robux-on-phone_GM431946152.pdf
    • http://library.ulb.ac.id/repository/wurst-client-download_GM479516143.pdf
    • http://library.ulb.ac.id/repository/free-robux-promo-codes-october-2021_GM431946152.pdf
    • http://library.ulb.ac.id/repository/roblox-pc-version-free-download_GM431946152.pdf
    • http://library.ulb.ac.id/repository/cool-roblox-outfits-for-fre_GM431946152.pdf
    • http://library.ulb.ac.id/repository/best-free-coin-master-spins_GM406889139.pdf
    • http://library.ulb.ac.id/repository/free-robux-password-only_GM431946152.pdf
    • http://library.ulb.ac.id//repository/coin-master-hack-spins-android_GM406889139.pdf
    • http://library.ulb.ac.id//repository/haktuts-coin-master-free-spins-2021_GM406889139.pdf
    • http://library.ulb.ac.id/repository/roblox-accont-hacking_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002e7a.bin
e5bd4a279606bf9eacea84a13017a72d4069589b8fe6fe40414a2e04addf1e09		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2E7A 21728 bytes
font_01_sfnt_off00005e3c.bin
b243e76df70d01787b4abb9d61239a3ba2c96d45c52dc487d8e46adcb473bba1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5E3C 19204 bytes

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