PDF malware analysis — malicious · c0b714272f463411

MALICIOUS

PDF

44.0 KB Created: 2021-05-14 14:41:47 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)

MD5: 8d85f1c31e6a7ce81ec5a924927d4835 SHA-1: d4bd31ad81961acea599128dd6e61074760a4717 SHA-256: c0b714272f463411aaebb3421c700a088063237c90d4acb637ad7006408f0f0a

102 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The document presents a fake CAPTCHA lure, instructing users to click links that lead to external URLs. These URLs are likely designed to trick users into downloading further malicious content or engaging in scams. The ML classifier also strongly indicated maliciousness.

Machine Learning

Nyx PDF Classifier malicious score 0.9969

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
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/431946152/how-to-scam-on-roblox-game-hack
- http://ernstgloves.co.il/images/earn-robux-today_GM431946152.pdf
- http://ernstgloves.co.il/images/roblox-prison-life-hack_GM431946152.pdf
- http://ernstgloves.co.il/images/free-coin-master-hacks_GM406889139.pdf
- http://ernstgloves.co.il/images/free-minecraft-bedrock-server_GM479516143.pdf
- http://ernstgloves.co.il/images/roblox-points_GM431946152.pdf
- http://ernstgloves.co.il/images/how-to-hack-coins-in-archery-master-3d_GM406889139.pdf
- http://ernstgloves.co.il/images/how-to-get-more-robux_GM431946152.pdf
- http://ernstgloves.co.il/images/coin-master-free-spins-2021-today_GM406889139.pdf
- http://ernstgloves.co.il/images/free-coin-master-coins-and-spins_GM406889139.pdf
- http://ernstgloves.co.il/images/how-do-i-get-free-robux_GM431946152.pdf
- http://ernstgloves.co.il/images/rbx-website_GM431946152.pdf
- http://ernstgloves.co.il/images/free-robux-no-email_GM431946152.pdf
- http://ernstgloves.co.il/images/free-hair-roblox_GM431946152.pdf
- http://ernstgloves.co.il/images/coin-master-club-hack_GM406889139.pdf
- http://ernstgloves.co.il/images/how-to-hack-roblox-accounts-on-phone-2021_GM431946152.pdf
- http://ernstgloves.co.il/images/how-to-get-to-village-3-in-coin-master_GM406889139.pdf
- http://ernstgloves.co.il/images/how-to-get-free-robux-without-downloading-any-apps_GM431946152.pdf
- http://ernstgloves.co.il/images/coin-master-free-spin-and-coins-links-2021_GM406889139.pdf
- http://ernstgloves.co.il/images/free-robux-real-2021_GM431946152.pdf
- http://ernstgloves.co.il/images/coin-master-game-free-download-for-pc_GM406889139.pdf
- http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`stream_003_off00004a12.bin` `463226444e9135396d34469b5033aff64b18a561216b3a62be0b905d5ba35131`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x4A12	27404 bytes
`font_01_sfnt_off0000891f.bin` `34f93b6f39f5197ad83579d8861054fdfd3ef28e5805cfd87bb9002912825c3f`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x891F	18436 bytes

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