PDF malware analysis — malicious · bcd1b6426a3820a5

MALICIOUS

PDF

45.5 KB Created: 2021-06-03 11:07:30 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)

MD5: 0e3da0de930840606fe76d305a1483f5 SHA-1: c8987df68ecbfbc29e0c209b3047984684a515a8 SHA-256: bcd1b6426a3820a56a47724b24f3e159a96f258cd3f1ead5fc0edd4dd99103f5

122 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The document presents a fake CAPTCHA and a call-to-action to trick users into downloading a malicious file, likely related to game hacks or currency. The embedded URLs point to external resources that likely host the secondary payload. The ML classifier strongly indicated maliciousness.

Machine Learning

Nyx PDF Classifier malicious score 0.9864

Heuristics 5

Fake CAPTCHA / human verification prompt high SE_FAKE_CAPTCHA

Document displays a fake CAPTCHA or human-verification prompt — used to trick users into running commands or pressing keyboard shortcuts
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.online/app/431946152/free-robux-today-game-hack
- http://library.imz.or.id/repository/coin-master-hack-online-download_GM406889139.pdf
- http://library.imz.or.id/repository/roblox-gang_GM431946152.pdf
- http://library.imz.or.id/repository/coin-master-hack-apk-35-18_GM406889139.pdf
- http://library.imz.or.id/repository/free-coins-and-spins-coin-master_GM406889139.pdf
- http://library.imz.or.id/repository/free-tiktok-likes-no-verification_GM835599320.pdf
- http://library.imz.or.id/repository/free-spins-october-28-2021-coin-master_GM406889139.pdf
- http://library.imz.or.id/repository/free-robux-generator-com-roblox-hack_GM431946152.pdf
- http://library.imz.or.id/repository/robuxmatchcom-free-robux_GM431946152.pdf
- http://library.imz.or.id/repository/free-spins-for-coin-master-2021_GM406889139.pdf
- http://library.imz.or.id/repository/coin-master-free-spins-link-download-hack_GM406889139.pdf
- http://library.imz.or.id/repository/coin-master-mod-version-free-download-v344_GM406889139.pdf
- http://library.imz.or.id/repository/www-coin-master-hack_GM406889139.pdf
- http://library.imz.or.id/repository/coin-master-free-spin-link-today-download_GM406889139.pdf
- http://library.imz.or.id/repository/minecraft-for-free-on-phone_GM479516143.pdf
- http://library.imz.or.id/repository/robux-money_GM431946152.pdf
- http://library.imz.or.id/repository/coin-master-free-coins-and-spins-link_GM406889139.pdf
- http://library.imz.or.id/repository/coin-master-hack-without-human-verification-india_GM406889139.pdf
- http://library.imz.or.id/repository/coin-master-hack-tool_GM406889139.pdf
- http://library.imz.or.id/repository/coin-master-free-spins-fb_GM406889139.pdf
- http://library.imz.or.id/repository/how-to-hack-roblox-accounts-passwords_GM431946152.pdf
- http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`stream_004_off00005097.bin` `29a2e6ac160472b445a85cb18258eaedafbe2466636190e60a6518a5141111df`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x5097	27260 bytes
`font_01_sfnt_off00008e20.bin` `123b3c01001442c78a22a4b95c046930f1463c344676a890e106be4cc216f6f4`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x8E20	18596 bytes

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