Malicious PDF — malware analysis report

Static analysis result for SHA-256 bfbaf05f0fe4efc6…

MALICIOUS

PDF

34.8 KB Created: 2021-07-05 08:39:35 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 582ed7309a2c4149ca47a3116e7056aa SHA-1: c4982a59704e241e16a39ccc7ea7447c5c213cec SHA-256: bfbaf05f0fe4efc6b34e5014ae12c4b8aa0bc32e460177f3cd680c13bf714d49
82 Risk Score

Malware Insights

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

The PDF document contains embedded URLs and impersonates the Roblox brand to lure users into downloading a "hacker tool". The primary URL, http://netcdn.tw/app/431946152/roblox-account-hacker-tool-game-hack, is directly associated with the malicious lure. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 4

  • Brand-impersonation credential phishing lure high SE_BRAND_CREDENTIAL_PHISH
    Document impersonates a well-known consumer brand and uses account-security / verification language ('unusual activity', 'account on hold', 'verify your account') to steer the reader to a credential-harvesting link. Corroborated by: call-to-action link host does not match the impersonated brand: http://netcdn.tw/app/431946152/roblox-account-hacker-tool-game-hack.
  • 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.tw/app/431946152/roblox-account-hacker-tool-game-hack PDF link annotation
    • https://eastwood.co.ke/uploaded_files/userfiles/files/coin-master-free-spins-facebook_GM406889139.pdfIn PDF document text
    • https://eastwood.co.ke/uploaded_files/userfiles/files/free-auto-clicker-for-roblox-mac_GM431946152.pdfIn PDF document text
    • https://eastwood.co.ke/uploaded_files/userfiles/files/como-solucionar-el-problema-de-shut-down-roblox-al-hackear_GM431946152.pdfIn PDF document text
    • https://eastwood.co.ke/uploaded_files/userfiles/files/how-to-get-minecraft-for-free_GM479516143.pdfIn PDF document text
    • https://eastwood.co.ke/uploaded_files/userfiles/files/tiktok-minecraft-hacks_GM479516143.pdfIn PDF document text
    • https://eastwood.co.ke/uploaded_files/userfiles/files/hack-roblox-players_GM431946152.pdfIn PDF document text
    • https://eastwood.co.ke/uploaded_files/userfiles/files/coin-master-free-online_GM406889139.pdfIn PDF document text
    • https://eastwood.co.ke/uploaded_files/userfiles/files/free-roblox-accounts-with-robux-that-work-not-banned-2021_GM431946152.pdfIn PDF document text
    • https://eastwood.co.ke/uploaded_files/userfiles/files/rbxoffers-com-free-robux_GM431946152.pdfIn PDF document text
    • https://eastwood.co.ke/uploaded_files/userfiles/files/robux-hack-2021-download_GM431946152.pdfIn PDF document text
    • https://eastwood.co.ke/uploaded_files/userfiles/files/free-roblox-gift-card-codes-2021_GM431946152.pdfIn PDF document text
    • https://eastwood.co.ke/uploaded_files/userfiles/files/free-roblox-gfx_GM431946152.pdfIn PDF document text
    • https://eastwood.co.ke/uploaded_files/userfiles/files/roblox40com-robux_GM431946152.pdfIn PDF document text
    • https://eastwood.co.ke/uploaded_files/userfiles/files/how-to-hack-coin-master-computer_GM406889139.pdfIn PDF document text
    • https://eastwood.co.ke/uploaded_files/userfiles/files/how-to-hack-atm-roblox_GM431946152.pdfIn PDF document text
    • https://eastwood.co.ke/uploaded_files/userfiles/files/roblox-apocalypse-rising-hack-september-2021_GM431946152.pdfIn PDF document text
    • https://eastwood.co.ke/uploaded_files/userfiles/files/how-to-get-free-snacks-on-coin-master_GM406889139.pdfIn PDF document text
    • https://eastwood.co.ke/uploaded_files/userfiles/files/ok-google-how-do-you-get-free-robux_GM431946152.pdfIn PDF document text
    • https://eastwood.co.ke/uploaded_files/userfiles/files/robux-download_GM431946152.pdfIn PDF document text
    • https://eastwood.co.ke/uploaded_files/userfiles/files/glitchtale-battle-of-souls-roblox-hack_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000313b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x313B 22508 bytes
SHA-256: 693a78d0057f9f7fb533fe651e2b792c33e74eda02a3c707da58cc41ba73b642
font_01_sfnt_off00006361.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6361 18900 bytes
SHA-256: 5e227fc62697cb3269bdd3a592c8ebb7199d78e91586905988432c1fb38acbe4

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