PDF malware analysis — malicious · a7736387d108e65e

MALICIOUS

PDF

43.7 KB Created: 2021-06-07 04:11:33 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)

MD5: 97cea4c33cf58bfcb7650cab6264dad3 SHA-1: 109036307fed52dbdca9284fa260fcdb965ee21b SHA-256: a7736387d108e65e021255b724be84bfaa23836c7e2e754f7a3c9bb5588fec65

82 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The document presents a fake CAPTCHA lure to trick the user into interacting with it, likely to initiate a download or redirect to a malicious site. The embedded URL, https://netcdn.tw/app/431946152/free-claim-robux-game-hack, is a primary indicator of the malicious destination. 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 0.9865

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-claim-robux-game-hack
- https://newenglandafs.com/images/ways-to-get-free-robux_GM431946152.pdf
- https://newenglandafs.com/images/how-to-get-free-robux-instantly_GM431946152.pdf
- https://newenglandafs.com/images/minecraft-pocket-edition-free_GM479516143.pdf
- https://newenglandafs.com/images/xray-mod-minecraft-114_GM479516143.pdf
- https://newenglandafs.com/images/free-robux-codes-generator-no-verification_GM431946152.pdf
- https://newenglandafs.com/images/how-to-hack-roblox-to-get-free-robux_GM431946152.pdf
- https://newenglandafs.com/images/how-to-hack-roblox-for-robux_GM431946152.pdf
- https://newenglandafs.com/images/how-to-hack-roblox-2021_GM431946152.pdf
- https://newenglandafs.com/images/robux-link_GM431946152.pdf
- https://newenglandafs.com/images/hack-coin-master-apk-33_GM406889139.pdf
- https://newenglandafs.com/images/how-to-hack-roblox-accounts_GM431946152.pdf
- https://newenglandafs.com/images/minecraft-hacker-skin_GM479516143.pdf
- https://newenglandafs.com/images/can-i-get-minecraft-for-free_GM479516143.pdf
- https://newenglandafs.com/images/pubg-4all-cool-20219-uc_GM1330123889.pdf
- https://newenglandafs.com/images/roblox-hack-tool_GM431946152.pdf
- https://newenglandafs.com/images/free-roblox-groups-with-funds_GM431946152.pdf
- https://newenglandafs.com/images/coin-master-free-spins-deutsch-download-2021-link_GM406889139.pdf
- https://newenglandafs.com/images/tiktok-free-online-videos_GM835599320.pdf
- https://newenglandafs.com/images/daily-free-spins_GM406889139.pdf
- https://newenglandafs.com/images/how-to-get-free-items-and-free-robux-in-roblox_GM431946152.pdf
- http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off00004f01.bin` `2604132e8be32211723f9832474aecbc29fa50696e49246d29b140a5b1bb6e08`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x4F01	24880 bytes
`font_01_sfnt_off0000872f.bin` `c3211e5dcdb23a540dd46986a763cf9a4b1156bd88f26df84549da460cbc8f0e`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x872F	18696 bytes

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