PDF malware analysis — malicious · c99209294fc6ab65

MALICIOUS

PDF

45.4 KB Created: 2021-05-10 20:33:30 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-05

MD5: 4ddb018f6ed066f0dc01b9e1e3e044a6 SHA-1: 5e5459537c5164e0e4606dbb358b913fb0564832 SHA-256: c99209294fc6ab65185a5d800a942e5067f75e06a0c2bb4a0d0ce7633c076667

182 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF contains numerous links to external websites, many of which are disguised as generators or hacks for popular games like Coin Master and Roblox. The presence of a fake CAPTCHA lure suggests an attempt to trick users into interacting with the document in a way that leads to malicious content. The ML classifier also strongly indicated maliciousness.

Machine Learning

Nyx PDF Classifier malicious score 0.9507

Heuristics 6

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.
PDF links to a 'free generator / game hack' redirector high PDF_GAME_HACK_REDIRECT_LURE

PDF's clickable action targets a redirector of the form /app/<id>/<slug>-game-hack — the landing-page shape of a large SEO 'free spins / generator / game hack' lure family that funnels victims through rotating disposable hosts to a malware/scam payload. The multi-link variants also trip ML/link-farm rules; this catches the single-link variants that otherwise score clean.
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/open-coin-master-game-hack PDF link annotation
- http://www.clooetherattorneys.com/uploaded_files/userfiles/files/coin-master-free-spins-generator_GM406889139.pdfIn PDF document text
- http://www.clooetherattorneys.com/uploaded_files/userfiles/files/free-robux-clothes_GM431946152.pdfIn PDF document text
- http://www.clooetherattorneys.com/uploaded_files/userfiles/files/how-to-get-free-robux-app_GM431946152.pdfIn PDF document text
- http://www.clooetherattorneys.com/uploaded_files/userfiles/files/coin-master-free-spins-link-haktuts_GM406889139.pdfIn PDF document text
- http://www.clooetherattorneys.com/uploaded_files/userfiles/files/how-to-get-roblox-premium-for-free_GM431946152.pdfIn PDF document text
- http://www.clooetherattorneys.com/uploaded_files/userfiles/files/coin-master-real-hack_GM406889139.pdfIn PDF document text
- http://www.clooetherattorneys.com/uploaded_files/userfiles/files/games-in-roblox-that-give-you-robux_GM431946152.pdfIn PDF document text
- http://www.clooetherattorneys.com/uploaded_files/userfiles/files/coin-master-com_GM406889139.pdfIn PDF document text
- http://www.clooetherattorneys.com/uploaded_files/userfiles/files/how-to-get-java-minecraft-for-free_GM479516143.pdfIn PDF document text
- http://www.clooetherattorneys.com/uploaded_files/userfiles/files/free-robux-cards_GM431946152.pdfIn PDF document text
- http://www.clooetherattorneys.com/uploaded_files/userfiles/files/free-coins-coin-master_GM406889139.pdfIn PDF document text
- http://www.clooetherattorneys.com/uploaded_files/userfiles/files/boost9-com-roblox-hack_GM431946152.pdfIn PDF document text
- http://www.clooetherattorneys.com/uploaded_files/userfiles/files/free-robux-generator-com-roblox-hack_GM431946152.pdfIn PDF document text
- http://www.clooetherattorneys.com/uploaded_files/userfiles/files/free-spins-for-coin-master-app_GM406889139.pdfIn PDF document text
- http://www.clooetherattorneys.com/uploaded_files/userfiles/files/free-cheat-codes-for-coin-master_GM406889139.pdfIn PDF document text
- http://www.clooetherattorneys.com/uploaded_files/userfiles/files/how-to-hack-m-coins-mcpe-master_GM406889139.pdfIn PDF document text
- http://www.clooetherattorneys.com/uploaded_files/userfiles/files/free-apk-mods-coin-master_GM406889139.pdfIn PDF document text
- http://www.clooetherattorneys.com/uploaded_files/userfiles/files/get-coin-master-cards-free_GM406889139.pdfIn PDF document text
- http://www.clooetherattorneys.com/uploaded_files/userfiles/files/if-you-delete-minecraft-can-you-redownload-it-for-free_GM479516143.pdfIn PDF document text
- http://www.clooetherattorneys.com/uploaded_files/userfiles/files/free-robux-no-anti-bot-verification_GM431946152.pdfIn PDF document text
- http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`stream_003_off00004d1c.bin`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x4D1C	26372 bytes
SHA-256: `21591d7b2a621395286edb0741687025d53fa4feccb8a256b36a03b1711be159`
`font_01_sfnt_off000086fb.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x86FB	2840 bytes
SHA-256: `3fb127b764b9d10f5525bc4de5ec8316de704409ccb0cf21cff3ad8a30d11676`
`font_02_sfnt_off000090ad.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x90AD	17724 bytes
SHA-256: `50fa6083fcbea3c37b42e9adc6f7c49d783d65341cfa8b80ae78b0fdb62cf2e6`

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