PDF malware analysis — malicious · 4bfa6b958aaf931f

MALICIOUS

PDF

45.5 KB Created: 2021-05-16 08:56:22 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)

MD5: 5f15f102bf38c5ff839e04d09539788b SHA-1: a8240bd10829c475663814422b2e5753f519f5da SHA-256: 4bfa6b958aaf931f376b3a7bfcc07ec9048eb7cb0c5d32db248fd347f6d7bade

90 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 the user into clicking a malicious link. The presence of multiple URLs, including one pointing to 'dailyrobux-game-hack', suggests an attempt to deliver a payload or redirect to a phishing site. The ML classifier also flagged this PDF as malicious.

Machine Learning

Nyx PDF Classifier malicious score 0.9507

Heuristics 5

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
Urgency / deadline lure low SE_URGENCY_LURE

Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
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/dailyrobux-game-hack
- https://gigbagwinkel.nl/images/wurst-112_GM479516143.pdf
- https://gigbagwinkel.nl/images/robux-codes_GM431946152.pdf
- https://gigbagwinkel.nl/images/how-to-get-2021-robux-for-free_GM431946152.pdf
- https://gigbagwinkel.nl/images/wurst_GM479516143.pdf
- https://gigbagwinkel.nl/images/free-robux-generator-no-human-verification-or-survey-2021_GM431946152.pdf
- https://gigbagwinkel.nl/images/coin-master-hack-spin_GM406889139.pdf
- https://gigbagwinkel.nl/images/coin-master-hacks-no-human-verification_GM406889139.pdf
- https://gigbagwinkel.nl/images/free-robux-generator-2021_GM431946152.pdf
- https://gigbagwinkel.nl/images/my-roblox-avatar_GM431946152.pdf
- https://gigbagwinkel.nl/images/2021-roblox_GM431946152.pdf
- https://gigbagwinkel.nl/images/coin-master-free-spins-and-coins-daily_GM406889139.pdf
- https://gigbagwinkel.nl/images/robux-free-gift-card_GM431946152.pdf
- https://gigbagwinkel.nl/images/coin-master-online_GM406889139.pdf
- https://gigbagwinkel.nl/images/coin-master-hack-app-for-iphone_GM406889139.pdf
- https://gigbagwinkel.nl/images/como-hackear-coin-master-iphone_GM406889139.pdf
- https://gigbagwinkel.nl/images/how-to-hack-coin-master-ios-2021_GM406889139.pdf
- https://gigbagwinkel.nl/images/hacks-to-get-free-robux_GM431946152.pdf
- https://gigbagwinkel.nl/images/coin-master-rewards-2021_GM406889139.pdf
- https://gigbagwinkel.nl/images/coin-master-free-spin-link-new_GM406889139.pdf
- https://gigbagwinkel.nl/images/free-roblox-generator-for-roblox_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_off00004650.bin` `ea5978230fdf2d0b39ca55a4ba5a17bed35f3525d4a6f059249fadcdab3a4981`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x4650	25596 bytes
`font_01_sfnt_off0000824a.bin` `3169421bbbb5fbcca920844bd60a5843210b4af7f029f71b312c88707731c0ee`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x824A	3564 bytes
`font_02_sfnt_off00008e36.bin` `006376ad9c7b73d4fd15d3b6dd3ffa9064f0af8ff6d6cdc29d45d1e9c8c3f0f5`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x8E36	18620 bytes

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