PDF malware analysis — malicious · b1cf7674192af99d

MALICIOUS

PDF

41.4 KB Created: 2021-05-19 22:44:57 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)

MD5: b2445843dca9a492cdcea0f04d0e25c0 SHA-1: e24bc8673f705832b5dce4cfa477abf4007331c5 SHA-256: b1cf7674192af99d6baee81f2568760fbc039b4521610db2449699500ab02255

82 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The document presents a fake CAPTCHA to trick users into clicking a link, which is a common social engineering tactic. The embedded URL points to a resource likely intended to deliver a second-stage payload. While no scripts were directly extracted, the PDF structure and heuristics suggest it's designed to exploit user interaction for malicious purposes.

Machine Learning

Nyx PDF Classifier malicious score 0.9971

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/406889139/free-coin-master-hacks-game-hack
- https://www.romedia.gr/images/minecraft-java-hacks_GM479516143.pdf
- https://www.romedia.gr/images/coin-master-hack-without-verification_GM406889139.pdf
- https://www.romedia.gr/images/coin-master-free-spins-hack_GM406889139.pdf
- https://www.romedia.gr/images/coin-game_GM406889139.pdf
- https://www.romedia.gr/images/coin-master-free-spins-2021-app_GM406889139.pdf
- https://www.romedia.gr/images/coin-master-free-spin-best-link_GM406889139.pdf
- https://www.romedia.gr/images/free-robux-that-actually-works-2021_GM431946152.pdf
- https://www.romedia.gr/images/minecraft-client-download_GM479516143.pdf
- https://www.romedia.gr/images/minecraft-tower-defense-2-hacked_GM479516143.pdf
- https://www.romedia.gr/images/get-free-robux-generator_GM431946152.pdf
- https://www.romedia.gr/images/coin-master-free-spins-link-31-march-2021_GM406889139.pdf
- https://www.romedia.gr/images/make-free-robux_GM431946152.pdf
- https://www.romedia.gr/images/minecraft-pe-hacked-client-download_GM479516143.pdf
- https://www.romedia.gr/images/free-coins-coin-master-2021_GM406889139.pdf
- https://www.romedia.gr/images/minecraft-bedrock-free-with-java_GM479516143.pdf
- https://www.romedia.gr/images/coin-master-free-spins-link-2021-app_GM406889139.pdf
- https://www.romedia.gr/images/how-to-get-minecraft-windows-10-for-free-2021_GM479516143.pdf
- https://www.romedia.gr/images/robux-boost_GM431946152.pdf
- https://www.romedia.gr/images/free-robux-sites-2021_GM431946152.pdf
- https://www.romedia.gr/images/coin-master-hack-com_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_off000047d2.bin` `cc2a2b8c47fac9f424c6525bb0877c8d65d424315e4279f787322b603647bb55`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x47D2	24772 bytes
`font_01_sfnt_off000080b3.bin` `e9d83edb2e1b044691ef11a4057c4d6cc11a4a50971021398c2c06fbe5537458`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x80B3	17880 bytes

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