PDF malware analysis — malicious · 65d7e58ff01fe7a8

MALICIOUS

PDF

47.3 KB Created: 2021-05-12 06:01:28 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)

MD5: b83a7008e93383301c621bb10f4b3bc6 SHA-1: 78dc2478c990ede4ecb967cd414f61b7d40049cf SHA-256: 65d7e58ff01fe7a8434f3fc3e033716a3e675a6f3a3eae5350cd83e7cdee36d0

142 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The document presents a fake CAPTCHA and a call-to-action lure, requesting recovery secrets, which are strong indicators of a phishing or social engineering attack. It contains multiple embedded URLs, including one pointing to 'netcdn.xyz/app/406889139/coinmaster-free-spins-link-game-hack', likely serving as a landing page for credential harvesting or further payload delivery. No scripts were extracted, but the overall structure and heuristics suggest a malicious intent to deceive the user.

Machine Learning

Nyx PDF Classifier malicious score 0.8948

Heuristics 5

Recovery secret / private key request critical SE_SECRET_RECOVERY_LURE

Document requests recovery phrases, private keys, backup codes, or saved passwords. Requests for these secrets in a document are high-risk.
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.xyz/app/406889139/coinmaster-free-spins-link-game-hack
- https://www.e-learning-man19jakarta.com/__statics/gudangsoal/files/mc-update_GM479516143.pdf
- https://www.e-learning-man19jakarta.com/__statics/gudangsoal/files/lastrick-com-coin-master-hack_GM406889139.pdf
- https://www.e-learning-man19jakarta.com/__statics/gudangsoal/files/claim-free-robux_GM431946152.pdf
- https://www.e-learning-man19jakarta.com/__statics/gudangsoal/files/free-spin-link-in-coin-master-game_GM406889139.pdf
- https://www.e-learning-man19jakarta.com/__statics/gudangsoal/files/free-robux-master_GM431946152.pdf
- https://www.e-learning-man19jakarta.com/__statics/gudangsoal/files/coin-master-hack-unlimited-spins-and-coins-cheats_GM406889139.pdf
- https://www.e-learning-man19jakarta.com/__statics/gudangsoal/files/minecraft-pe-hack-client_GM479516143.pdf
- https://www.e-learning-man19jakarta.com/__statics/gudangsoal/files/rbxoffers-com-free-robux_GM431946152.pdf
- https://www.e-learning-man19jakarta.com/__statics/gudangsoal/files/hack-coins-in-coin-master_GM406889139.pdf
- https://www.e-learning-man19jakarta.com/__statics/gudangsoal/files/blox-supply-free-robux_GM431946152.pdf
- https://www.e-learning-man19jakarta.com/__statics/gudangsoal/files/100-free-spins-coin-master_GM406889139.pdf
- https://www.e-learning-man19jakarta.com/__statics/gudangsoal/files/is-minecraft-earth-free_GM479516143.pdf
- https://www.e-learning-man19jakarta.com/__statics/gudangsoal/files/coin-master-hacks_GM406889139.pdf
- https://www.e-learning-man19jakarta.com/__statics/gudangsoal/files/free-robux-without-human-verification_GM431946152.pdf
- https://www.e-learning-man19jakarta.com/__statics/gudangsoal/files/free-spins-for-coin-master-app_GM406889139.pdf
- https://www.e-learning-man19jakarta.com/__statics/gudangsoal/files/robloxbux-us-generator_GM431946152.pdf
- https://www.e-learning-man19jakarta.com/__statics/gudangsoal/files/robux-money_GM431946152.pdf
- https://www.e-learning-man19jakarta.com/__statics/gudangsoal/files/coin-master-hack-apk-free-download_GM406889139.pdf
- https://www.e-learning-man19jakarta.com/__statics/gudangsoal/files/2021-no-human-verification-hack-for-coin-master_GM406889139.pdf
- https://www.e-learning-man19jakarta.com/__statics/gudangsoal/files/roblox-gift-card-for-free_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_off00004e31.bin` `5e9741db800f12fd43064d872685bcbdd5e12e1148a9fa7e9353f3268d91ed17`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x4E31	26572 bytes
`font_01_sfnt_off00008c88.bin` `c1a618813a64314343402b2ec738fc11c4c912460a4c7ae3029924d2f9a229cd`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x8C88	2896 bytes
`font_02_sfnt_off0000966e.bin` `e23e47edf411310e4720a9a584017679d42dc8e6fe25c1f08798108aa15add5d`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x966E	18316 bytes

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