PDF malware analysis — malicious · 43db1e67645ec590

MALICIOUS

PDF

34.9 KB Created: 2021-07-03 17:55:02 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-16

MD5: 8f75d467268ac68f3f504dfcccfe254e SHA-1: 33d4d57f7e8b6046fe427a14682ac3e7012e97c2 SHA-256: 43db1e67645ec590a8e100a45c67d5e7019205b623974b1d2e7826520c60c4c8

82 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The document contains embedded URLs and a document body that explicitly advertises 'free Robux' and game cheats, indicating a social engineering lure. The ML classifier strongly flagged this PDF as malicious, and the presence of external URIs suggests it is designed to redirect users to malicious sites. The heuristic for a password-protected archive lure further supports the intent to conceal a malicious payload.

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.tw/app/431946152/how-to-get-free-robux-youtube-game-hack PDF link annotation
- https://kalautsav.bepcssa.in/ckfinder/userfiles/files/minecraft-java-edition-redeem-code-free-2021_GM479516143.pdfIn PDF document text
- https://kalautsav.bepcssa.in/ckfinder/userfiles/files/coin-master-cheats-2021_GM406889139.pdfIn PDF document text
- https://kalautsav.bepcssa.in/ckfinder/userfiles/files/free-domain-for-minecraft-server_GM479516143.pdfIn PDF document text
- https://kalautsav.bepcssa.in/ckfinder/userfiles/files/how-to-get-free-unlimited-robux_GM431946152.pdfIn PDF document text
- https://kalautsav.bepcssa.in/ckfinder/userfiles/files/free-spins-and-coins-from-coin-master-game_GM406889139.pdfIn PDF document text
- https://kalautsav.bepcssa.in/ckfinder/userfiles/files/rbxdemon_GM431946152.pdfIn PDF document text
- https://kalautsav.bepcssa.in/ckfinder/userfiles/files/roblox-patched-cheat-engine_GM431946152.pdfIn PDF document text
- https://kalautsav.bepcssa.in/ckfinder/userfiles/files/hacking-a-roblox-fans_GM431946152.pdfIn PDF document text
- https://kalautsav.bepcssa.in/ckfinder/userfiles/files/minecraft-xbox-360-free_GM479516143.pdfIn PDF document text
- https://kalautsav.bepcssa.in/ckfinder/userfiles/files/coin-master-free-spins-hack-iphone_GM406889139.pdfIn PDF document text
- https://kalautsav.bepcssa.in/ckfinder/userfiles/files/free-spin-coin-master-app-download_GM406889139.pdfIn PDF document text
- https://kalautsav.bepcssa.in/ckfinder/userfiles/files/minecraft-tools_GM479516143.pdfIn PDF document text
- https://kalautsav.bepcssa.in/ckfinder/userfiles/files/cheat-engine-money-hack-roblox_GM431946152.pdfIn PDF document text
- https://kalautsav.bepcssa.in/ckfinder/userfiles/files/c-rex-hack-roblox_GM431946152.pdfIn PDF document text
- https://kalautsav.bepcssa.in/ckfinder/userfiles/files/free-robux-hack-2021-no-human-verification_GM431946152.pdfIn PDF document text
- https://kalautsav.bepcssa.in/ckfinder/userfiles/files/free-robux-codes_GM431946152.pdfIn PDF document text
- https://kalautsav.bepcssa.in/ckfinder/userfiles/files/roblox-com-free-robux_GM431946152.pdfIn PDF document text
- https://kalautsav.bepcssa.in/ckfinder/userfiles/files/coin-master-email-free-spins_GM406889139.pdfIn PDF document text
- https://kalautsav.bepcssa.in/ckfinder/userfiles/files/roblox-mon-compte-il-fait-hacker_GM431946152.pdfIn PDF document text
- https://kalautsav.bepcssa.in/ckfinder/userfiles/files/ez-hacker-roblox_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.

Filename	Kind	Source	Size
`font_00_sfnt_off000030ac.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x30AC	22520 bytes
SHA-256: `065132e364ef74f32b1f81df8723873de2990218268730a6da73e73563d39c2a`
`font_01_sfnt_off000062ff.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x62FF	19144 bytes
SHA-256: `69f15bf39f48ef2819c4fe30de5c54b763846b00a79d58176de4c37c6d2b833d`

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