PDF malware analysis — malicious · 5978b26d06599a68

MALICIOUS

PDF

35.1 KB Created: 2021-07-05 16:16:25 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)

MD5: 6649f4c767d7887008824d7f45135aa4 SHA-1: ce9a73b6a4b081cc45a1fe2c93ed0c8b4e1f2819 SHA-256: 5978b26d06599a683879cfb882d0791c9f65e6d7399e9a1a826fb133a5dec2cf

142 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1204.002 User Execution: Malicious Link

The PDF document contains a fake CAPTCHA lure, designed to trick users into clicking on numerous embedded links. These links, such as 'http://netcdn.tw/app/479516143/minecraft-free-download-chromebook-game-hack', likely lead to the download of malicious payloads or phishing pages. The ML classifier also strongly indicated maliciousness.

Machine Learning

Nyx PDF Classifier malicious score 0.9980

Heuristics 5

Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM

Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
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 http://netcdn.tw/app/479516143/minecraft-free-download-chromebook-game-hack
- http://tckontrola.hr/files/free-printable-minecraft-coloring-pages_GM479516143.pdf
- http://tckontrola.hr/files/free-coins-for-planet-master-game_GM406889139.pdf
- http://tckontrola.hr/files/roblox-free-executor_GM431946152.pdf
- http://tckontrola.hr/files/coin-master-free-link-today_GM406889139.pdf
- http://tckontrola.hr/files/free-roblox-download-for-mac_GM431946152.pdf
- https://tckontrola.hr/files/roblox-bad-business-hack-speedrun_GM431946152.pdf
- https://tckontrola.hr/files/pokemon-go-update-free-download_GM1094591345.pdf
- http://tckontrola.hr/files/roblox-hacks-and-cheats_GM431946152.pdf
- http://tckontrola.hr/files/free-robux-creator_GM431946152.pdf
- https://tckontrola.hr/files/pubg-uc-kharidna-hai_GM1330123889.pdf
- http://tckontrola.hr/files/how-to-get-roebucks-on-roblox_GM431946152.pdf
- http://tckontrola.hr/files/roblox-skywars-how-to-get-free-armor_GM431946152.pdf
- http://tckontrola.hr/files/free-roblox-cards-2021_GM431946152.pdf
- https://tckontrola.hr/files/coin-master-100-free-spins-link_GM406889139.pdf
- http://tckontrola.hr/files/free-roblox-account-givaway-may-7th-2021_GM431946152.pdf
- https://tckontrola.hr/files/promo-codes-to-get-free-robux_GM431946152.pdf
- https://tckontrola.hr/files/get-free-robux-on-ipad-2021_GM431946152.pdf
- https://tckontrola.hr/files/hack-coin-master-8-ball-pool_GM406889139.pdf
- https://tckontrola.hr/files/strucid-aimbot_GM431946152.pdf
- https://tckontrola.hr/files/coin-master-email-rewards-link_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_002_off00003083.bin` `cd53854a84f660fa1b49e601faeea47d1868e50583e5855e797e478f38baac4b`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x3083	22744 bytes
`font_01_sfnt_off00006376.bin` `4d7e6a8ad3ab477c7586955708d040336cfd9a5a5d373cde419f68ec141d9187`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x6376	19332 bytes

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