PDF malware analysis — malicious · 735728c6d4516dcc

MALICIOUS

PDF

44.2 KB Created: 2021-05-19 15:52:17 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)

MD5: ca2232c73874a95ccc3dcbfa46c886a2 SHA-1: 51a2af814134a64754925661e48e4fdbfe8ded3c SHA-256: 735728c6d4516dccaa968f85c059564d87952b8b3f4d79dd51c1725236fee620

82 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1204.002 Malicious File

The PDF document contains a fake CAPTCHA lure, aiming to trick users into downloading a malicious script from the provided URL. The ML classifier strongly flagged this PDF as malicious, and the embedded URLs point to game-related hacks, reinforcing the social engineering pretext. No scripts were extracted, but the presence of a fake CAPTCHA and external URI strongly suggests a downloader or exploit delivery mechanism.

Machine Learning

Nyx PDF Classifier malicious score 0.9976

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.xyz/app/431946152/ro-ghoul-script-game-hack
- https://www.prodex-holz.cz/images/roblox-robux-generator_GM431946152.pdf
- https://www.prodex-holz.cz/images/how-to-get-free-robux_GM431946152.pdf
- https://www.prodex-holz.cz/images/how-to-install-minecraft-for-free_GM479516143.pdf
- https://www.prodex-holz.cz/images/robux-generator-com_GM431946152.pdf
- https://www.prodex-holz.cz/images/coin-master-free-spins-hack-without-human-verification_GM406889139.pdf
- https://www.prodex-holz.cz/images/sites-to-get-free-robux_GM431946152.pdf
- https://www.prodex-holz.cz/images/free-roblox-website_GM431946152.pdf
- https://www.prodex-holz.cz/images/coin-master-cards-free-cards_GM406889139.pdf
- https://www.prodex-holz.cz/images/coin-master-free-spins-and-coins-today_GM406889139.pdf
- https://www.prodex-holz.cz/images/how-to-get-20210-robux-for-free_GM431946152.pdf
- https://www.prodex-holz.cz/images/how-to-hack-peoples-roblox-accounts_GM431946152.pdf
- https://www.prodex-holz.cz/images/free-ways-to-get-robux_GM431946152.pdf
- https://www.prodex-holz.cz/images/minecraft-pvp-hacks_GM479516143.pdf
- https://www.prodex-holz.cz/images/hacks-for-minecraft-windows-10_GM479516143.pdf
- https://www.prodex-holz.cz/images/coin-master-free-spin-group_GM406889139.pdf
- https://www.prodex-holz.cz/images/free-robux-for-kids-no-verification_GM431946152.pdf
- https://www.prodex-holz.cz/images/free-spin-coin_GM406889139.pdf
- https://www.prodex-holz.cz/images/how-to-hack-coin-master-ios-no-jailbreak_GM406889139.pdf
- https://www.prodex-holz.cz/images/how-to-hack-any-roblox-account_GM431946152.pdf
- https://www.prodex-holz.cz/images/coin-master-daily-free-spins_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_off0000495f.bin` `b20619e290a04dcd182dfd505807b1120704234833d8c067924a478181bf3109`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x495F	28632 bytes
`font_01_sfnt_off00008b03.bin` `23416a4f265accecd35463abb88f8064d2787c4310c7b82a5b5da3b5a07e9376`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x8B03	18120 bytes

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