PDF malware analysis — malicious · 58c93322385df5a1

MALICIOUS

PDF

45.1 KB Created: 2021-06-11 10:56:52 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)

MD5: 88821b5ad81b90430b8f5fdee8bd02c7 SHA-1: d8e6ee4721b62acc695bc7a57ed8789ed9a132c9 SHA-256: 58c93322385df5a10c76071f089c4b878e26e98186fe8354ae794225ee5d6492

82 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The document presents a fake CAPTCHA to trick users into clicking a link, which is a common social engineering tactic. The embedded URL, https://netcdn.tw/app/431946152/free-bc-roblox-accounts-2021-game-hack, likely leads to a malicious payload or phishing page. The ML classifier also strongly indicated maliciousness.

Machine Learning

Nyx PDF Classifier malicious score 0.9980

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/free-bc-roblox-accounts-2021-game-hack
- http://www.thecoffeebaron.co.za/images/coin-master-free-spin-link-today-16-11-2021_GM406889139.pdf
- http://www.thecoffeebaron.co.za/images/mosttechs-coin-master-free-spins_GM406889139.pdf
- http://www.thecoffeebaron.co.za/images/roblox-game-free-download_GM431946152.pdf
- http://www.thecoffeebaron.co.za/images/free-robux-pastebin_GM431946152.pdf
- http://www.thecoffeebaron.co.za/images/roblox-guest-shirt-free-2021_GM431946152.pdf
- http://www.thecoffeebaron.co.za/images/free-spins-and-coins-coin-master_GM406889139.pdf
- http://www.thecoffeebaron.co.za/images/free-robux-live_GM431946152.pdf
- http://www.thecoffeebaron.co.za/images/roblox-com-free_GM431946152.pdf
- http://www.thecoffeebaron.co.za/images/coin-master-golden-cards-hack_GM406889139.pdf
- http://www.thecoffeebaron.co.za/images/free-robux-generator-no-human-verification-2021_GM431946152.pdf
- http://www.thecoffeebaron.co.za/images/get-free-cards-in-coin-master_GM406889139.pdf
- http://www.thecoffeebaron.co.za/images/coin-master-free-spin-codes_GM406889139.pdf
- http://www.thecoffeebaron.co.za/images/pubg-uc-20210_GM1330123889.pdf
- http://www.thecoffeebaron.co.za/images/how-to-get-robux-for-free-2021_GM431946152.pdf
- http://www.thecoffeebaron.co.za/images/get-free-robux-now_GM431946152.pdf
- http://www.thecoffeebaron.co.za/images/free-tiktok-accounts-with-followers_GM835599320.pdf
- http://www.thecoffeebaron.co.za/images/roblox-hack-2021_GM431946152.pdf
- http://www.thecoffeebaron.co.za/images/roblox-bloxburg-hack_GM431946152.pdf
- http://www.thecoffeebaron.co.za/images/how-you-get-free-robux_GM431946152.pdf
- http://192.168.0.99/%20%3Cp%3E%3Cp%3EHow%20to%20Get%20Free%20Robux.%20So%20as%20to%20do%20this,%20navigate%20over%20the%20wire%20beside%20the%20stove%20that%20will%20take%20you%20across%20Truth%20be%20told,%20you
- http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`stream_003_off0000515a.bin` `c3c9b912c9867d807c12befbfba47978e95badc31e1b8534daa179ab1562b8ba`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x515A	26244 bytes
`font_01_sfnt_off00008dcb.bin` `c54e2b7875f4b5be9307169020c6e9e63af94abf6cd5666225e094ef96d87abd`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x8DCB	18320 bytes

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