Malicious PDF — malware analysis report

Static analysis result for SHA-256 5bb286cbc94965e4…

MALICIOUS

PDF

34.8 KB Created: 2021-06-18 16:58:54 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 341faeb067e721ba3f043f9e732e9755 SHA-1: 110a062f4798dd693fefcce60a95306ce0cbee5b SHA-256: 5bb286cbc94965e4b1ef4277d8c1723a7cd039cf8fc3e2b2f700e349301924e6
62 Risk Score

Malware Insights

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

The document contains multiple embedded URLs and a prominent external URI pointing to a site offering 'free Robux' and 'game hack' downloads, strongly suggesting a lure for malware. The ML classifier also flagged this PDF as malicious with high confidence. The presence of a 'download button' heuristic further supports the malicious intent of directing users to external resources.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 4

  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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-roblox-login-password-game-hack
    • https://pendapatan.denpasarkota.go.id/new/public/ckfinder/userfiles/files/coin-master-village-cost_GM406889139.pdf
    • https://pendapatan.denpasarkota.go.id/new/public/ckfinder/userfiles/files/coin-master-free-spins-activegamer_GM406889139.pdf
    • https://pendapatan.denpasarkota.go.id/new/public/ckfinder/userfiles/files/free-robux-thumbnail_GM431946152.pdf
    • https://pendapatan.denpasarkota.go.id/new/public/ckfinder/userfiles/files/coin-master-daily-free-spins-25_GM406889139.pdf
    • https://pendapatan.denpasarkota.go.id/new/public/ckfinder/userfiles/files/how-to-hack-roblox-accounts-on-phone_GM431946152.pdf
    • https://pendapatan.denpasarkota.go.id/new/public/ckfinder/userfiles/files/free-minecraft-svg-cutting-files_GM479516143.pdf
    • https://pendapatan.denpasarkota.go.id/new/public/ckfinder/userfiles/files/tp-hack-roblox-execute-command_GM431946152.pdf
    • https://pendapatan.denpasarkota.go.id/new/public/ckfinder/userfiles/files/rbx-roblox_GM431946152.pdf
    • https://pendapatan.denpasarkota.go.id/new/public/ckfinder/userfiles/files/free-robux-no-offers_GM431946152.pdf
    • https://pendapatan.denpasarkota.go.id/new/public/ckfinder/userfiles/files/coin-master-free-spins-2021_GM406889139.pdf
    • https://pendapatan.denpasarkota.go.id/new/public/ckfinder/userfiles/files/how-to-get-a-free-minecraft-server_GM479516143.pdf
    • https://pendapatan.denpasarkota.go.id/new/public/ckfinder/userfiles/files/free-robux-2021-no-verification_GM431946152.pdf
    • https://pendapatan.denpasarkota.go.id/new/public/ckfinder/userfiles/files/coin-master-hack-ios-without-verification_GM406889139.pdf
    • https://pendapatan.denpasarkota.go.id/new/public/ckfinder/userfiles/files/minecraft-dungeons-download-free_GM479516143.pdf
    • https://pendapatan.denpasarkota.go.id/new/public/ckfinder/userfiles/files/online-coin-master-hack-here_GM406889139.pdf
    • https://pendapatan.denpasarkota.go.id/new/public/ckfinder/userfiles/files/roblox-free-clothes-codes_GM431946152.pdf
    • https://pendapatan.denpasarkota.go.id/new/public/ckfinder/userfiles/files/free-robux-without-verification-or-survey_GM431946152.pdf
    • https://pendapatan.denpasarkota.go.id/new/public/ckfinder/userfiles/files/how-to-get-free-robux-youtube_GM431946152.pdf
    • https://pendapatan.denpasarkota.go.id/new/public/ckfinder/userfiles/files/free-robux-on-ipad_GM431946152.pdf
    • https://pendapatan.denpasarkota.go.id/new/public/ckfinder/userfiles/files/coin-master-game-hack-apk_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00003009.bin
d891de83d8bad252225c4a8fbdb96bb531b6d167d1233669b9014dd75ba1dbf0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x3009 22540 bytes
font_01_sfnt_off00006282.bin
6bc13ca5cfa2f8e2739b921f20f221ba808d87faa76a676071a34a5c0093744a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6282 19216 bytes

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