PDF malware analysis — malicious · 3664009863c5d80a

MALICIOUS

PDF

45.3 KB Created: 2021-06-04 03:13:48 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)

MD5: fc00ddb2614026e2e0ad33170b18409e SHA-1: 02c3e229011ce8228a2bbdc46b8c03d5d040f4d8 SHA-256: 3664009863c5d80af982597769200591398d1778cbe3f59933719cc7d14b8986

82 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The document displays a fake CAPTCHA to trick users into clicking a link, which is a common social engineering tactic. The embedded URL leads to a site offering 'free Robux', a known lure for gaming-related scams. While no scripts were directly extracted, the PDF structure and heuristics suggest it's designed to exploit user interaction, potentially leading to a second-stage download or redirection.

Machine Learning

Nyx PDF Classifier malicious score 0.9864

Heuristics 4

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
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/can-i-get-robux-for-free-game-hack
- http://lib.teknik.unimal.ac.id/repository/free-robux-not-a-scam_GM431946152.pdf
- http://lib.teknik.unimal.ac.id/repository/free-roblox-animations_GM431946152.pdf
- http://lib.teknik.unimal.ac.id/repository/how-to-hack-roblox-on-mobile_GM431946152.pdf
- http://lib.teknik.unimal.ac.id//repository/roblox-gift-card-free-codes_GM431946152.pdf
- http://lib.teknik.unimal.ac.id/repository/how-to-get-free-roebucks_GM431946152.pdf
- http://lib.teknik.unimal.ac.id//repository/how-to-get-minecraft-pe-for-free-ios_GM479516143.pdf
- http://lib.teknik.unimal.ac.id/repository/coin-master-links-free-spins_GM406889139.pdf
- http://lib.teknik.unimal.ac.id/repository/free-robux-apk_GM431946152.pdf
- http://lib.teknik.unimal.ac.id/repository/coin-master-hack-android_GM406889139.pdf
- http://lib.teknik.unimal.ac.id/repository/free-diamonds-coin-master_GM406889139.pdf
- http://lib.teknik.unimal.ac.id//repository/robux-free-gift-card-org-hack_GM431946152.pdf
- http://lib.teknik.unimal.ac.id//repository/how-to-generate-free-coin-master-spin_GM406889139.pdf
- http://lib.teknik.unimal.ac.id//repository/hack-coin-master-343-apk_GM406889139.pdf
- http://lib.teknik.unimal.ac.id/repository/free-executor-roblox_GM431946152.pdf
- http://lib.teknik.unimal.ac.id/repository/how-to-get-minecraft-on-chromebook-for-free_GM479516143.pdf
- http://lib.teknik.unimal.ac.id//repository/coin-master-game-hack-app_GM406889139.pdf
- http://lib.teknik.unimal.ac.id//repository/can-pokemon-go-free-account-2021_GM1094591345.pdf
- http://lib.teknik.unimal.ac.id/repository/haktuts-coin-master-free-spins_GM406889139.pdf
- http://lib.teknik.unimal.ac.id/repository/get-free-cards-in-coin-master_GM406889139.pdf
- http://lib.teknik.unimal.ac.id/repository/op-rewards-robux_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_off00005249.bin` `4b885294ad4f6a8e00e551b7286155365d7f32dbe1fa28335bde457874c41020`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x5249	26752 bytes
`font_01_sfnt_off00008e34.bin` `56a64ad9af2fab004080c55c49ec35472f3c2134e95e40197be892b268dd39d5`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x8E34	18344 bytes

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