PDF malware analysis — malicious · 98f94886bcab296a

MALICIOUS

PDF

45.6 KB Created: 2021-06-08 23:36:22 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25

MD5: e629718c895aaaef577114d08f461111 SHA-1: 85dd11816d80933957c7abc4e62b36f638adfa73 SHA-256: 98f94886bcab296a392cf81a931853d0a1da9bbda924dcd6c1f4593acfec6ea9

82 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. The file routes users through malicious redirector infrastructure and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

Nyx PDF Classifier malicious score 0.9864

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 https://netcdn.tw/app/431946152/free-roblox-accounts-without-pin-game-hack PDF link annotation
- http://www.rigor.co.mz/uploaded_files/userfiles/files/roblox-no-download-hack_GM431946152.pdfIn PDF document text
- http://www.rigor.co.mz/uploaded_files/userfiles/files/robux-matchcomfree-robux_GM431946152.pdfIn PDF document text
- http://www.rigor.co.mz/uploaded_files/userfiles/files/coin-master-free-spin-link-today-2021_GM406889139.pdfIn PDF document text
- http://www.rigor.co.mz/uploaded_files/userfiles/files/links-for-coin-master-free-spins_GM406889139.pdfIn PDF document text
- http://www.rigor.co.mz/uploaded_files/userfiles/files/minecraft-cracked-client_GM479516143.pdfIn PDF document text
- http://www.rigor.co.mz/uploaded_files/userfiles/files/free-coin-coin-master_GM406889139.pdfIn PDF document text
- http://www.rigor.co.mz/uploaded_files/userfiles/files/roblox-free-play-no-download_GM431946152.pdfIn PDF document text
- http://www.rigor.co.mz/uploaded_files/userfiles/files/free-spin-and-coin_GM406889139.pdfIn PDF document text
- http://www.rigor.co.mz/uploaded_files/userfiles/files/coin-master-hack-cheat-generator-d_GM406889139.pdfIn PDF document text
- http://www.rigor.co.mz/uploaded_files/userfiles/files/earn-free-robux-for-roblox_GM431946152.pdfIn PDF document text
- http://www.rigor.co.mz/uploaded_files/userfiles/files/rbx-gg-free-robux_GM431946152.pdfIn PDF document text
- http://www.rigor.co.mz/uploaded_files/userfiles/files/coin-master-hack-pc-2021_GM406889139.pdfIn PDF document text
- http://www.rigor.co.mz/uploaded_files/userfiles/files/coin-master-free-spins-and-coins-link-haktuts_GM406889139.pdfIn PDF document text
- http://www.rigor.co.mz/uploaded_files/userfiles/files/free-spins-on-coin-master-generator_GM406889139.pdfIn PDF document text
- http://www.rigor.co.mz/uploaded_files/userfiles/files/coin-master-hack-tool-exe_GM406889139.pdfIn PDF document text
- http://www.rigor.co.mz/uploaded_files/userfiles/files/wurst-115_GM479516143.pdfIn PDF document text
- http://www.rigor.co.mz/uploaded_files/userfiles/files/scaffold-minecraft-hack_GM479516143.pdfIn PDF document text
- http://www.rigor.co.mz/uploaded_files/userfiles/files/how-to-get-free-robux-without-paying_GM431946152.pdfIn PDF document text
- http://www.rigor.co.mz/uploaded_files/userfiles/files/free-face-roblox_GM431946152.pdfIn PDF document text
- http://www.rigor.co.mz/uploaded_files/userfiles/files/free-tiktok-followers_GM835599320.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_off0000519e.bin`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x519E	26040 bytes
SHA-256: `57c085b6ad35a74f16ca4364a7ab1aca023402a82bb9481ea787d63cd1d4b84a`
`font_01_sfnt_off00008e1d.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x8E1D	18828 bytes
SHA-256: `1f44e2983df983a16b2f30651d3ac37a1ab45750fd2700a0f0ebbc65e7114a98`

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