PDF malware analysis — malicious · 19b2f2bf728e98eb

MALICIOUS

PDF

36.4 KB Created: 2021-06-29 09:45:34 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29

MD5: 4a41ab4f3d02c56960f34cbf24075989 SHA-1: 2fc7b9771223ae72951a56f2adc115e5b8c86ab7 SHA-256: 19b2f2bf728e98eb81a3d31835553971afc2c7bb67fab28006ee7b7a389a8244

82 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF file contains a lure related to 'Roblox Hack Robux 2021' and links to a URL that appears to be a redirector for malicious content. The ML classifier strongly flagged this PDF as malicious. While no scripts were directly extracted, the PDF structure and embedded URLs suggest an attempt to trick users into downloading or visiting a malicious site, likely for credential harvesting or malware delivery.

Machine Learning

Nyx PDF Classifier malicious score 0.9980

Heuristics 4

PDF links to a 'free generator / game hack' redirector high PDF_GAME_HACK_REDIRECT_LURE

PDF's clickable action targets a redirector of the form /app/<id>/<slug>-game-hack — the landing-page shape of a large SEO 'free spins / generator / game hack' lure family that funnels victims through rotating disposable hosts to a malware/scam payload. The multi-link variants also trip ML/link-farm rules; this catches the single-link variants that otherwise score clean.
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 http://netcdn.co/app/431946152/roblox-hack-robux-2021-game-hack PDF link annotation
- https://www.naizak.com/uploaded_files/userfiles/files/free-roblox-accounts-that-work_GM431946152.pdfIn PDF document text
- https://www.naizak.com/uploaded_files/userfiles/files/www-robux-com_GM431946152.pdfIn PDF document text
- https://www.naizak.com/uploaded_files/userfiles/files/roblox-dragon-ball-z-final-stand-cheat_GM431946152.pdfIn PDF document text
- https://www.naizak.com/uploaded_files/userfiles/files/coin-master-online-hack-link_GM406889139.pdfIn PDF document text
- https://www.naizak.com/uploaded_files/userfiles/files/hack-avatar_GM431946152.pdfIn PDF document text
- https://www.naizak.com/uploaded_files/userfiles/files/free-money-links-coin-master_GM406889139.pdfIn PDF document text
- https://www.naizak.com/uploaded_files/userfiles/files/how-to-get-free-robux-and-tix-no-hack_GM431946152.pdfIn PDF document text
- https://www.naizak.com/uploaded_files/userfiles/files/roblox-tower-battles-credits-hack_GM431946152.pdfIn PDF document text
- https://www.naizak.com/uploaded_files/userfiles/files/free-roblox-girl-clothes_GM431946152.pdfIn PDF document text
- https://www.naizak.com/uploaded_files/userfiles/files/free-robux-no-human-verification-no-survey_GM431946152.pdfIn PDF document text
- https://www.naizak.com/uploaded_files/userfiles/files/codes-that-people-think-your-a-hacker-roblox_GM431946152.pdfIn PDF document text
- https://www.naizak.com/uploaded_files/userfiles/files/free-clothes-on-roblox-2021_GM431946152.pdfIn PDF document text
- https://www.naizak.com/uploaded_files/userfiles/files/how-to-get-roebucks_GM431946152.pdfIn PDF document text
- https://www.naizak.com/uploaded_files/userfiles/files/how-to-hack-roblox-accounts_GM431946152.pdfIn PDF document text
- https://www.naizak.com/uploaded_files/userfiles/files/coin-master-free-spins-facebook_GM406889139.pdfIn PDF document text
- https://www.naizak.com/uploaded_files/userfiles/files/how-to-get-free-hats-on-roblox_GM431946152.pdfIn PDF document text
- https://www.naizak.com/uploaded_files/userfiles/files/earn-free-robux-for-roblox_GM431946152.pdfIn PDF document text
- https://www.naizak.com/uploaded_files/userfiles/files/hackear-coin-master-android_GM406889139.pdfIn PDF document text
- https://www.naizak.com/uploaded_files/userfiles/files/lyce-de-roblox-2-hack-directeur_GM431946152.pdfIn PDF document text
- https://www.naizak.com/uploaded_files/userfiles/files/robloxhackbalance_GM431946152.pdfIn PDF document text
- http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off000035ea.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x35EA	22616 bytes
SHA-256: `5a13eeb1fbc0fa32ab5798e3bd1323e8ba1c5f255a32503ccdd127e713511931`
`font_01_sfnt_off0000689b.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x689B	19200 bytes
SHA-256: `84c5ff5965211f89041d87bccb0594bff3a79cea557fd8953f22112aaeccd919`

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