PDF malware analysis — malicious · 9c5081daaf9b6b3e

MALICIOUS

PDF

35.1 KB Created: 2021-07-04 06:13:40 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-05

MD5: 9bc8041167b7721486477b6b53613896 SHA-1: e6ff65e5ab6a53148144eb547d35450a34e629fe SHA-256: 9c5081daaf9b6b3ec6315ea6fafec802ff44858dccaa2f3456c7c88f12f0319c

82 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF document employs a common lure of 'free game hacks' to entice users to click on a malicious URL. The primary URL, http://netcdn.tw/app/406889139/coin-master-free-spins-link-download-game-hack, is directly linked to the lure. While no scripts were explicitly extracted, the PDF structure and heuristics suggest it is designed to exploit vulnerabilities or redirect users to a malicious site, likely for credential harvesting or malware delivery.

Machine Learning

Nyx PDF Classifier malicious score 0.9980

Heuristics 4

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.
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/406889139/coin-master-free-spins-link-download-game-hack PDF link annotation
- https://www.toyogas.com.tw/upload/files/free-spins-and-coins-for-coin-master_GM406889139.pdfIn PDF document text
- https://www.toyogas.com.tw/upload/files/free-gamepasses-roblox-greasyfork_GM431946152.pdfIn PDF document text
- https://www.toyogas.com.tw/upload/files/pokemon-go-free-9db_GM1094591345.pdfIn PDF document text
- https://www.toyogas.com.tw/upload/files/robux-offer-wall_GM431946152.pdfIn PDF document text
- https://www.toyogas.com.tw/upload/files/como-hackear-cuentas-roblox_GM431946152.pdfIn PDF document text
- https://www.toyogas.com.tw/upload/files/how-to-get-free-robux-out-of-the-consule_GM431946152.pdfIn PDF document text
- https://www.toyogas.com.tw/upload/files/wwwcoin-master-free-spincom_GM406889139.pdfIn PDF document text
- https://www.toyogas.com.tw/upload/files/free-robux-for-kids-no-verification_GM431946152.pdfIn PDF document text
- https://www.toyogas.com.tw/upload/files/roblox-elysian-level7-hack-exploit-new_GM431946152.pdfIn PDF document text
- https://www.toyogas.com.tw/upload/files/how-to-hack-coin-master-ios-2021_GM406889139.pdfIn PDF document text
- https://www.toyogas.com.tw/upload/files/how-to-get-free-tiktok-likes_GM835599320.pdfIn PDF document text
- https://www.toyogas.com.tw/upload/files/roblox-jailbreak-hack-download-noclip_GM431946152.pdfIn PDF document text
- https://www.toyogas.com.tw/upload/files/roblox-brickbattle-hack_GM431946152.pdfIn PDF document text
- https://www.toyogas.com.tw/upload/files/coin-master-hacks-free-spins_GM406889139.pdfIn PDF document text
- https://www.toyogas.com.tw/upload/files/face-free-roblox_GM431946152.pdfIn PDF document text
- https://www.toyogas.com.tw/upload/files/how-to-install-minecraft-for-free-on-ios_GM479516143.pdfIn PDF document text
- https://www.toyogas.com.tw/upload/files/free-robux-np-verification_GM431946152.pdfIn PDF document text
- https://www.toyogas.com.tw/upload/files/how-to-get-robux-free-2021_GM431946152.pdfIn PDF document text
- https://www.toyogas.com.tw/upload/files/daily-coin-master-free-spin-link_GM406889139.pdfIn PDF document text
- https://www.toyogas.com.tw/upload/files/is-roblox-virus-free_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_002_off00003092.bin`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x3092	23268 bytes
SHA-256: `4f16688583a3390d351f38e066d38ac8b34cca8ad920dcad647f9a9c28c871ad`
`font_01_sfnt_off0000648a.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x648A	18924 bytes
SHA-256: `a4bb17e2b546a4d7fe34b124958f87fb40140c6e90ac4756c30edd8d3bfebad3`

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