Malicious PDF — malware analysis report

Static analysis result for SHA-256 8250ba3e33feaa42…

MALICIOUS

PDF

50.0 KB Created: 2021-06-10 23:10:55 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 42c84d2cbfb15e320bf4abc528e2aaee SHA-1: 0df97fa42c9549ed0e8d4b8158dd47c0318b53b3 SHA-256: 8250ba3e33feaa42ca7314692b71a1c3420739c33907936b354b08252a1b48b3
82 Risk Score

Malware Insights

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

The PDF document contains a lure related to obtaining free Robux, a popular in-game currency, directing users to a malicious URL. The presence of a "password-protected archive handoff" heuristic suggests that the linked content may be an encrypted payload, further indicating a malicious intent to deliver malware. The ML classifier also flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9796

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 https://netcdn.tw/app/431946152/how-to-get-1-million-robux-on-roblox-for-free-game-hack
    • http://safari-crimea.com/images/tiktok-free-fans_GM835599320.pdf
    • http://safari-crimea.com/images/can-you-really-hack-coin-master_GM406889139.pdf
    • http://safari-crimea.com/images/how-to-hack-roblox-accounts-for-robux_GM431946152.pdf
    • http://safari-crimea.com/images/roblox-hackers-list_GM431946152.pdf
    • http://safari-crimea.com/images/roblox-robux-hack-generator_GM431946152.pdf
    • http://safari-crimea.com/images/coin-master-free-spons-apk-2021_GM406889139.pdf
    • http://safari-crimea.com/images/coin-master-hoe-to-get-extra-free-spins_GM406889139.pdf
    • http://safari-crimea.com/images/hack-for-roblox-in-jail-break_GM431946152.pdf
    • http://safari-crimea.com/images/microsoft-free-robux_GM431946152.pdf
    • http://safari-crimea.com/images/can-you-hack-your-own-roblox_GM431946152.pdf
    • http://safari-crimea.com/images/free-robux-no-verification-2021-ios_GM431946152.pdf
    • http://safari-crimea.com/images/roblox-avatar-tester_GM431946152.pdf
    • http://safari-crimea.com/images/roblox-arsenal-hack_GM431946152.pdf
    • http://safari-crimea.com/images/coin-master-free-spins-link-2021-haktuts_GM406889139.pdf
    • http://safari-crimea.com/images/free-fans-on-tiktok_GM835599320.pdf
    • http://safari-crimea.com/images/roblox-speed-hack-no-cheat-engine_GM431946152.pdf
    • http://safari-crimea.com/images/how-to-get-free-permanent-robux_GM431946152.pdf
    • http://safari-crimea.com/images/free-robux-kid-friendly_GM431946152.pdf
    • http://safari-crimea.com/images/free-robux-no-human-verification-and-no-survey_GM431946152.pdf
    • http://safari-crimea.com/images/how-to-hack-sword-fighting-tournament-on-roblox-2021_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000050d1.bin
1dff945e66114e61a2c1b23f5ab5d00d970ac0fe9f9068115c992b1435e0e40b
pdf-font-stream PDF embedded font (sfnt) at offset 0x50D1 30036 bytes
font_01_sfnt_off000092f0.bin
40b61f8938bd710dc29dc58ba3fde91c245a6a69596ec569b4d27c769ca417cf
pdf-font-stream PDF embedded font (sfnt) at offset 0x92F0 3884 bytes
font_02_sfnt_off00009f97.bin
afa97cc9e09dd6527a31074d51fe74612449dfd2965d460cab6537c02e30fe79
pdf-font-stream PDF embedded font (sfnt) at offset 0x9F97 18776 bytes