PDF malware analysis — malicious · 1857fc439828da57

MALICIOUS

PDF

41.3 KB Created: 2021-04-23 14:55:11 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-17

MD5: 1d0e765ceafdac2028e12f614b168089 SHA-1: ed80da5c1ae03fe667a0ffdabd89c769070369ab SHA-256: 1857fc439828da57fe53d3dbe71786e56bc3af10b28767b51b61efe1fed7dbd9

82 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF document employs a common lure of 'free Robux' and game hacks to entice users. It contains multiple embedded URLs, including a primary redirector at `https://netsecure.top/app/431946152/free-robux-gift-card-codes-unused-game-hack`, which likely leads to malicious sites or further downloads. The ML classifier strongly flagged this PDF as malicious, supporting the observed lure and redirection behavior.

Machine Learning

Nyx PDF Classifier malicious score 0.9941

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://netsecure.top/app/431946152/free-robux-gift-card-codes-unused-game-hack PDF link annotation
- http://www.technibuild-group.com/uploaded_files/userfiles/files/get-free-robux-now-free-robux-generator-com.pdfIn PDF document text
- http://www.technibuild-group.com/uploaded_files/userfiles/files/how-to-cheat-in-roblox-prison-life.pdfIn PDF document text
- http://www.technibuild-group.com/uploaded_files/userfiles/files/roblox-phantom-forces-hack-script.pdfIn PDF document text
- http://www.technibuild-group.com/uploaded_files/userfiles/files/roblox-apocalypse-rising-cheat-engine-codes.pdfIn PDF document text
- http://www.technibuild-group.com/uploaded_files/userfiles/files/como-descargarse-hacks-en-roblox-jailbreak-agosto-2021.pdfIn PDF document text
- http://www.technibuild-group.com/uploaded_files/userfiles/files/free-robux-generotor.pdfIn PDF document text
- http://www.technibuild-group.com/uploaded_files/userfiles/files/no-survey-anti-bots-allowed-robux-hacker.pdfIn PDF document text
- http://www.technibuild-group.com/uploaded_files/userfiles/files/hot-to-hack-roblox-games.pdfIn PDF document text
- http://www.technibuild-group.com/uploaded_files/userfiles/files/free-bc-roblox-2021.pdfIn PDF document text
- http://www.technibuild-group.com/uploaded_files/userfiles/files/roblox-free-cool-outfits.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_003_off00004322.bin`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x4322	26220 bytes
SHA-256: `3c78322aac0a649736538d1bd4fa62aeb2dbe320d285674a3615f10ed2efc278`
`font_01_sfnt_off00007e1d.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x7E1D	18828 bytes
SHA-256: `53c2e8a5ad658f680472b690f4960d0460b427e7e226ae1a28b7392434fc213e`

Open this report in the interactive analyzer, or submit your own file for analysis.