PDF malware analysis — malicious · 5ecd9cf48255671f

MALICIOUS

PDF

47.9 KB Created: 2021-06-11 03:21:35 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)

MD5: 8633c08861608af8103014250427bbdc SHA-1: ae1540ad46b03f41281837a29edd127b196e7209 SHA-256: 5ecd9cf48255671f041b5515651add755b0d6e83f3ccbc9edfdfb6b3ede4caf8

82 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The document presents a fake CAPTCHA or human verification prompt to trick users into clicking malicious links, likely to download a second-stage payload. The embedded URL and numerous other URLs point to sites offering 'free Robux' or game hacks, a common lure for phishing and malware distribution. The ML classifier also strongly indicated maliciousness.

Machine Learning

Nyx PDF Classifier malicious score 0.9796

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.tw/app/431946152/how-to-get-free-robux-no-human-survey-game-hack
- http://www.meslekpatent.com/images/free-minecraft-capes-no-mods_GM479516143.pdf
- http://www.meslekpatent.com/images/roblox-hack-de-romper-las-paredes_GM431946152.pdf
- http://www.meslekpatent.com/images/coin-master-free-gifts_GM406889139.pdf
- http://www.meslekpatent.com/images/coin-master-hack-apk-free-download_GM406889139.pdf
- http://www.meslekpatent.com/images/free-robux-master_GM431946152.pdf
- http://www.meslekpatent.com/images/free-robux-generator-without-human-verification_GM431946152.pdf
- http://www.meslekpatent.com/images/coin-master-free-spins-link-2021-today_GM406889139.pdf
- http://www.meslekpatent.com/images/robux-free-co_GM431946152.pdf
- http://www.meslekpatent.com/images/buy-robux-free_GM431946152.pdf
- http://www.meslekpatent.com/images/free-robux-codes-2021_GM431946152.pdf
- http://www.meslekpatent.com/images/minecraft-pe-free_GM479516143.pdf
- http://www.meslekpatent.com/images/minecraft-account-hacked_GM479516143.pdf
- http://www.meslekpatent.com/images/hack-coin-master-apk-2021_GM406889139.pdf
- http://www.meslekpatent.com/images/coin-master-free-spin-and-coin-links_GM406889139.pdf
- http://www.meslekpatent.com/images/minecraft-login-free_GM479516143.pdf
- http://www.meslekpatent.com/images/free-mods-for-minecraft-pe_GM479516143.pdf
- http://www.meslekpatent.com/images/roblox-hacked-accounts-list_GM431946152.pdf
- http://www.meslekpatent.com/images/mine-minecraft-games-for-free_GM479516143.pdf
- http://www.meslekpatent.com/images/coin-master-spin-link-hack_GM406889139.pdf
- http://www.meslekpatent.com/images/roblox-a_GM431946152.pdf
- http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`stream_004_off0000522e.bin` `d96d6f0bbc3f661d7c5a099665dcd7f6c562b7a786ad26299942e86ce8015fc9`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x522E	25512 bytes
`font_01_sfnt_off00008bc8.bin` `d27ca7269cc665f7c566dcba71d1fcbd1348614b7b6242da2500f0713fcbc8bc`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x8BC8	2928 bytes
`font_02_sfnt_off000095e7.bin` `5e1d77da05f4582e753932c71996338a803a671ed4ead34cc6784b94dd133737`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x95E7	19064 bytes

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