PDF malware analysis — malicious · 3ce18ac85251cd9c

MALICIOUS

PDF

46.3 KB Created: 2021-05-17 21:08:44 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)

MD5: 31de12d1282faf3c409409451417892a SHA-1: acb87923cfad069584b18cfb7c07bacc0a9f0080 SHA-256: 3ce18ac85251cd9c7d4697d18fa4ceacf8ab03746efc2ade9c656424fbe49c5e

82 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The document presents a fake CAPTCHA or human verification prompt to trick the user into interacting with it, likely to initiate a download. The embedded URL, https://netcdn.xyz/app/431946152/games-to-get-free-robux-game-hack, is a strong indicator of a malicious download attempt. While no scripts were explicitly extracted, the PDF structure and heuristics suggest it's designed to exploit user interaction for payload delivery.

Machine Learning

Nyx PDF Classifier malicious score 0.8696

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.xyz/app/431946152/games-to-get-free-robux-game-hack
- http://dennemaat.nl/images/how-to-get-free-robux-without-doing-anything-2021_GM431946152.pdf
- http://dennemaat.nl/images/free-robux-hack-no-human-verification-or-survey_GM431946152.pdf
- http://dennemaat.nl/images/coin-master-facebook-page_GM406889139.pdf
- http://dennemaat.nl/images/roblox-2021_GM431946152.pdf
- http://dennemaat.nl/images/robux-hack-2021_GM431946152.pdf
- http://dennemaat.nl/images/how-to-hack-coin-master-game-2021_GM406889139.pdf
- http://dennemaat.nl/images/minecraft-free-unblocked_GM479516143.pdf
- http://dennemaat.nl/images/free-spins-and-coins-from-coin-master-game_GM406889139.pdf
- http://dennemaat.nl/images/how-to-get-100-free-spins-on-coin-master_GM406889139.pdf
- http://dennemaat.nl/images/coin-master-gold-cards-hack-english_GM406889139.pdf
- http://dennemaat.nl/images/coin-master-hack-download_GM406889139.pdf
- http://dennemaat.nl/images/spin-and-coin_GM406889139.pdf
- http://dennemaat.nl/images/windows-10-minecraft-hacks_GM479516143.pdf
- http://dennemaat.nl/images/coin-master-free-spins-link-blogspot-today_GM406889139.pdf
- http://dennemaat.nl/images/can-u-get-free-robux_GM431946152.pdf
- http://dennemaat.nl/images/clean-master-coins-hack_GM406889139.pdf
- http://dennemaat.nl/images/free-robux-real-working_GM431946152.pdf
- http://dennemaat.nl/images/coin-master-claim-spins_GM406889139.pdf
- http://dennemaat.nl/images/robux-hacks-2021_GM431946152.pdf
- http://dennemaat.nl/images/how-to-get-free-robux-on-phone_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_003_off00004784.bin` `112d3a1a86417aaadff43a0d47efb66d726190c78d61ebda3ad5822785e77136`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x4784	27668 bytes
`font_01_sfnt_off000087ed.bin` `94c1b019735d7e491765340abe50b2897410e2ec65ecf141c08bd9f2220897c4`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x87ED	2824 bytes
`font_02_sfnt_off0000919c.bin` `08e91301afb793f0c8f569168ad93911c90315771ef2b58170e32493949df7cc`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x919C	18608 bytes

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