PDF malware analysis — malicious · 4f1823d5fc60a936

MALICIOUS

PDF

44.1 KB Created: 2021-05-14 05:35:06 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)

MD5: e99850d443ada3567898b541751aa387 SHA-1: adb89efc11b40fe475a7345b4ef737475e9b07cd SHA-256: 4f1823d5fc60a9363b3c8cef3c4f86029b048879c2f91c788e2077028f996e37

62 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF document contains multiple embedded URLs and a heuristic firing for an external URI, all pointing to websites that appear to be related to game hacks and free in-game currency. The document body, though partially corrupted, contains text related to 'Free Coin Master Credit' and a URL, reinforcing the lure. The presence of a 'ML_NYX_PDF_MALICIOUS' classification further supports the malicious nature of the file.

Machine Learning

Nyx PDF Classifier malicious score 0.9648

Heuristics 4

Callback phishing phone lure medium SE_CALLBACK_LURE

Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
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/406889139/free-coin-master-credit-game-hack
- http://bufbd.org/images/static-moonactive-net-free-spins_GM406889139.pdf
- http://bufbd.org/images/how-to-get-free-robux-for-real_GM431946152.pdf
- http://bufbd.org/images/buy-robux-free_GM431946152.pdf
- http://bufbd.org/images/how-to-find-coin-master-free-spin-link_GM406889139.pdf
- http://bufbd.org/images/wizard-hacks_GM479516143.pdf
- http://bufbd.org/images/roblox36com-free-robux_GM431946152.pdf
- http://bufbd.org/images/coin-master-free-spins-hacktman_GM406889139.pdf
- http://bufbd.org/images/free-robux-come_GM431946152.pdf
- http://bufbd.org/images/how-to-get-free-robux-no-verification-2021_GM431946152.pdf
- http://bufbd.org/images/robux-link_GM431946152.pdf
- http://bufbd.org/images/cone-master_GM406889139.pdf
- http://bufbd.org/images/roblox-executor-free_GM431946152.pdf
- http://bufbd.org/images/how-to-hack-coin-master-game-2021_GM406889139.pdf
- http://bufbd.org/images/minecraft-windows-10-edition-hacked-client_GM479516143.pdf
- http://bufbd.org/images/free-roblox-money_GM431946152.pdf
- http://bufbd.org/images/free-roblox-account-generator_GM431946152.pdf
- http://bufbd.org/images/coin-master-game-free-play-online_GM406889139.pdf
- http://bufbd.org/images/how-to-hack-roblox-accounts-on-phone_GM431946152.pdf
- http://bufbd.org/images/free-robux-websites-that-actually-work_GM431946152.pdf
- http://bufbd.org/images/lots-of-robux_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_off00004733.bin` `f3627f3b5c082bceefce6665970888bee3a11fe9a9836dc501bf2608962e4068`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x4733	24748 bytes
`font_01_sfnt_off00007ef2.bin` `1dd933c112880b232546f3aab6a17784a8f412d39fd551cc6eb31c5a04c3ce57`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x7EF2	3380 bytes
`font_02_sfnt_off00008ada.bin` `34dd8c80f69d0f68a5b5993274c8f1bdeef3254478921523cc39dd8566b84a5f`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x8ADA	17884 bytes

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