PDF malware analysis — malicious · f99df25b476337c5

MALICIOUS

PDF

44.3 KB Created: 2021-06-09 04:41:58 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13

MD5: 031c456b390fd66d346acd6969b91c87 SHA-1: af4dfe7346be05970a461558ce7650bb9c5f914f SHA-256: f99df25b476337c59b070ed24cf474057bac8bcd2ce67d4aa96f52237140dd75

142 Risk Score

Malware Insights

MITRE ATT&CK

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

This PDF document contains a large number of external links, many of which are hosted on the same domains and appear to be part of a link farm designed to attract users with lures related to games and hacks. The presence of a fake CAPTCHA heuristic indicates a deceptive user interface intended to trick users into interacting with malicious links. The document's primary purpose appears to be redirecting users to potentially malicious websites or scam pages.

Machine Learning

Nyx PDF Classifier malicious score 0.9865

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 https://netcdn.tw/app/431946152/hacken-in-roblox-game-hack PDF link annotation
- http://wwic.wales/uploads/files/files/roblox-free-robux-no-verification_GM431946152.pdfIn PDF document text
- http://wwic.wales/uploads/files/files/coin-master-ultra-attack-hack_GM406889139.pdfIn PDF document text
- http://wwic.wales/uploads/files/files/good-free-minecraft-server-hosting_GM479516143.pdfIn PDF document text
- http://wwic.wales/uploads/files/files/coin-master-free-spins-link-today-hack_GM406889139.pdfIn PDF document text
- http://wwic.wales/uploads/files/files/how-to-actually-get-free-robux_GM431946152.pdfIn PDF document text
- http://wwic.wales/uploads/files/files/coin-master-hack-app-2021-download_GM406889139.pdfIn PDF document text
- http://wwic.wales/uploads/files/files/free-coin-master-spins-blog_GM406889139.pdfIn PDF document text
- http://wwic.wales/uploads/files/files/roblox-free-robux-hack_GM431946152.pdfIn PDF document text
- http://wwic.wales/uploads/files/files/minecraft-free-computer-game_GM479516143.pdfIn PDF document text
- http://wwic.wales/uploads/files/files/coin-master-twitter-free-spins_GM406889139.pdfIn PDF document text
- http://wwic.wales/uploads/files/files/how-to-get-free-premium-roblox_GM431946152.pdfIn PDF document text
- http://wwic.wales/uploads/files/files/gamesofficenet-hack-coin-master_GM406889139.pdfIn PDF document text
- http://wwic.wales/uploads/files/files/can-i-download-minecraft-for-free_GM479516143.pdfIn PDF document text
- http://wwic.wales/uploads/files/files/new-obby-gives-you-free-robux_GM431946152.pdfIn PDF document text
- http://wwic.wales/uploads/files/files/how-to-get-free-skins-in-minecraft_GM479516143.pdfIn PDF document text
- http://wwic.wales/uploads/files/files/free-spins-coin-master-november-2021_GM406889139.pdfIn PDF document text
- http://wwic.wales/uploads/files/files/free-spins-and-coins-for-coin-master_GM406889139.pdfIn PDF document text
- http://wwic.wales/uploads/files/files/pokemon-go-free-download_GM1094591345.pdfIn PDF document text
- http://wwic.wales/uploads/files/files/coin-master-hack-2021_GM406889139.pdfIn PDF document text
- http://wwic.wales/uploads/files/files/websites-to-hack-roblox-accounts_GM431946152.pdfIn PDF document text
- http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`stream_004_off00005108.bin`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x5108	25312 bytes
SHA-256: `5dd7d4559e0df9cfa1ea73e5d03ff5cbff0c2fd86b1912c7831149cbd058a31e`
`font_01_sfnt_off00008a8f.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x8A8F	18184 bytes
SHA-256: `da08b9a4c4d00db2759f430577b00d71e0d11c9f5ae6a8b7d827ba4c8fe3ef88`

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