PDF malware analysis — malicious · c6cf0f7e5fb1c8bd

MALICIOUS

PDF

44.4 KB Created: 2021-05-15 06:38:14 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)

MD5: e7e125cdecfa5aa1147a668ce20eb949 SHA-1: 3536544825f8e856742876dbb8f5b1e62a0ef506 SHA-256: c6cf0f7e5fb1c8bdf25d3271e91cc3d615d51e0b42e5d5dff7d94daffb18b932

82 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The document presents a fake CAPTCHA and includes numerous links to external websites, suggesting a lure to trick users into clicking through to potentially malicious sites or downloading further payloads. The ML classifier strongly flagged this PDF as malicious, and the presence of fake CAPTCHA heuristics reinforces the deceptive nature of the document. While no scripts were explicitly extracted, the embedded URLs are the primary indicators of malicious intent, likely leading to scam or malware distribution pages.

Machine Learning

Nyx PDF Classifier malicious score 0.9980

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/how-to-get-free-robux-games-game-hack
- https://itv-grabungen.de/images/how-to-download-minecraft-for-free-on-windows-10_GM479516143.pdf
- https://itv-grabungen.de/images/freespins-coin-master_GM406889139.pdf
- https://itv-grabungen.de/images/free-robux-microsoft_GM431946152.pdf
- https://itv-grabungen.de/images/coin-master-free-cards-and-spin-link_GM406889139.pdf
- https://itv-grabungen.de/images/coin-master-free-spins-cheat-deutsch_GM406889139.pdf
- https://itv-grabungen.de/images/free-robux-that-actually-works_GM431946152.pdf
- https://itv-grabungen.de/images/free-op-minecraft-servers_GM479516143.pdf
- https://itv-grabungen.de/images/free-minecraft-maps_GM479516143.pdf
- https://itv-grabungen.de/images/how-to-hack-roblox-accounts-2021_GM431946152.pdf
- https://itv-grabungen.de/images/coin-master-hack-spins-apk_GM406889139.pdf
- https://itv-grabungen.de/images/free-roblox-hack_GM431946152.pdf
- https://itv-grabungen.de/images/free-robux-gen_GM431946152.pdf
- https://itv-grabungen.de/images/get-coin-master-hack_GM406889139.pdf
- https://itv-grabungen.de/images/how-to-get-free-pet-food-in-coin-master_GM406889139.pdf
- https://itv-grabungen.de/images/coin-master-hack-tool-v1-9-download-free_GM406889139.pdf
- https://itv-grabungen.de/images/coin-master-hack-without-verification-ios_GM406889139.pdf
- https://itv-grabungen.de/images/coin-master-free-chip_GM406889139.pdf
- https://itv-grabungen.de/images/free-spins-and-coins-from-coin-master-game_GM406889139.pdf
- https://itv-grabungen.de/images/free-robux-scams_GM431946152.pdf
- https://itv-grabungen.de/images/how-to-get-free-robux-without-download-apps-or-survey_GM431946152.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_off00004d81.bin` `e5520ad4e37af111cbf7b9d5607a3a2ca12c2f2f11beb9383d7983083c24d6c8`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x4D81	25940 bytes
`font_01_sfnt_off000089be.bin` `f0658a260a8345a08039bbf50682235c712e1d6bfd9b3eebd82ad720f29012b5`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x89BE	18768 bytes

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