PDF malware analysis — malicious · 3d485b25dba42a42

MALICIOUS

PDF

35.1 KB Created: 2021-07-04 10:24:26 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29

MD5: eb2ae1e0d7122a8efa5559c0a255d5d3 SHA-1: 2abb03e348c547cddc21cd1f5c7fb0f1e07ff933 SHA-256: 3d485b25dba42a42f9387f269383c1668829affcff86962eb3c63b4c8a168bc2

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 0.9980

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/431946152/free-robux-by-watching-ads-game-hack PDF link annotation
- https://www.brightwake.co.uk/uploads/files/files/coin-master-daily-free-spins-link-app_GM406889139.pdfIn PDF document text
- https://www.brightwake.co.uk/uploads/files/files/free-robux-games-on-roblox_GM431946152.pdfIn PDF document text
- https://www.brightwake.co.uk/uploads/files/files/how-to-hack-roblox-for-robux_GM431946152.pdfIn PDF document text
- https://www.brightwake.co.uk/uploads/files/files/free-robux-no-verification-2021-ios_GM431946152.pdfIn PDF document text
- https://www.brightwake.co.uk/uploads/files/files/pastebm-free-roblox-accounts_GM431946152.pdfIn PDF document text
- https://www.brightwake.co.uk/uploads/files/files/roblox-hack-game_GM431946152.pdfIn PDF document text
- https://www.brightwake.co.uk/uploads/files/files/coin-master-hack-spins-apk_GM406889139.pdfIn PDF document text
- https://www.brightwake.co.uk/uploads/files/files/flame-gg-free-robux_GM431946152.pdfIn PDF document text
- https://www.brightwake.co.uk/uploads/files/files/wil-they-cheat-roblox-thumbnail_GM431946152.pdfIn PDF document text
- https://www.brightwake.co.uk/uploads/files/files/real-free-robux-codes_GM431946152.pdfIn PDF document text
- https://www.brightwake.co.uk/uploads/files/files/free-coin-master-gold-cards_GM406889139.pdfIn PDF document text
- https://www.brightwake.co.uk/uploads/files/files/free-spins-coin-master-2021-today_GM406889139.pdfIn PDF document text
- https://www.brightwake.co.uk/uploads/files/files/spawn-hacks-roblox_GM431946152.pdfIn PDF document text
- https://www.brightwake.co.uk/uploads/files/files/roblox-hack-without-downloading-anything_GM431946152.pdfIn PDF document text
- https://www.brightwake.co.uk/uploads/files/files/free-robux-site_GM431946152.pdfIn PDF document text
- https://www.brightwake.co.uk/uploads/files/files/coin-master-free-spins-link-blogspot-today_GM406889139.pdfIn PDF document text
- https://www.brightwake.co.uk/uploads/files/files/coin-master-free-spins-gratis_GM406889139.pdfIn PDF document text
- https://www.brightwake.co.uk/uploads/files/files/coin-master-free-spin-game_GM406889139.pdfIn PDF document text
- https://www.brightwake.co.uk/uploads/files/files/free-robux-com-2021_GM431946152.pdfIn PDF document text
- https://www.brightwake.co.uk/uploads/files/files/free-coins--spins-coin-master_GM406889139.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_off00002e1b.bin`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x2E1B	23220 bytes
SHA-256: `703741c73531a4ffd94b4a7493518b51e8d3868fd78dd0d82ae351d3c5802345`
`font_01_sfnt_off00006274.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x6274	19660 bytes
SHA-256: `f0cdf6166c464805662a9cde01402bcc449eb6222422d9d5af766ad530424c87`

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