PDF malware analysis — malicious · 4b4b78539a4927a4

MALICIOUS

PDF

47.1 KB Created: 2021-05-11 09:05:56 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29

MD5: af47c6f0cfeed13f59d247cffe74aad7 SHA-1: 2e912877c00c1c9d334e4eff734d0133112d72b2 SHA-256: 4b4b78539a4927a4a4e242373f486d30ad57154338f1fb02a5b3d2e2f864b86f

142 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

This PDF document employs a link farm technique, presenting numerous links that promise game hacks and free currency for popular games like Roblox and Coin Master. The primary lure appears to be related to 'Robux game hack' and 'free spins', directing users to external URLs that are likely part of a phishing or malware distribution scheme. The ML classifier also strongly indicated maliciousness.

Machine Learning

Nyx PDF Classifier malicious score 0.8948

Heuristics 5

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.
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/431946152/20210-robux-game-hack PDF link annotation
- https://key8013805.com.tw/upload/files/hack-roblox-players_GM431946152.pdfIn PDF document text
- https://key8013805.com.tw/upload/files/coin-master-hack-version-2021-free-download_GM406889139.pdfIn PDF document text
- https://key8013805.com.tw/upload/files/coin-master-free-spin-and-coins-links-2021_GM406889139.pdfIn PDF document text
- https://key8013805.com.tw/upload/files/coin-master-heaven-free-spins_GM406889139.pdfIn PDF document text
- https://key8013805.com.tw/upload/files/how-to-get-free-robux-on-roblox-2021_GM431946152.pdfIn PDF document text
- https://key8013805.com.tw/upload/files/coin-master-free-spin-ml_GM406889139.pdfIn PDF document text
- https://key8013805.com.tw/upload/files/how-to-get-free-robux-on-phone_GM431946152.pdfIn PDF document text
- https://key8013805.com.tw/upload/files/huskybuckscom-free-robux_GM431946152.pdfIn PDF document text
- https://key8013805.com.tw/upload/files/download-hacked-games-com-coin-master_GM406889139.pdfIn PDF document text
- https://key8013805.com.tw/upload/files/100-free-spins-coin-master_GM406889139.pdfIn PDF document text
- https://key8013805.com.tw/upload/files/free-robux-for-kids-no-verification_GM431946152.pdfIn PDF document text
- https://key8013805.com.tw/upload/files/coin-master-free-spin-whatsapp-group-link_GM406889139.pdfIn PDF document text
- https://key8013805.com.tw/upload/files/free-spins-for-coin-master_GM406889139.pdfIn PDF document text
- https://key8013805.com.tw/upload/files/cm-daily-spins_GM406889139.pdfIn PDF document text
- https://key8013805.com.tw/upload/files/ww-roblox-come_GM431946152.pdfIn PDF document text
- https://key8013805.com.tw/upload/files/www-free-robux-com_GM431946152.pdfIn PDF document text
- https://key8013805.com.tw/upload/files/coin-master-mod-version-free-download-v344_GM406889139.pdfIn PDF document text
- https://key8013805.com.tw/upload/files/show-me-how-to-get-free-robux_GM431946152.pdfIn PDF document text
- https://key8013805.com.tw/upload/files/coin-master-gold-cards-hack-2021_GM406889139.pdfIn PDF document text
- https://key8013805.com.tw/upload/files/free-spins-coin-master-links-thursday-november-28-2021_GM406889139.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
`font_00_sfnt_off00004d37.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x4D37	24224 bytes
SHA-256: `02769258a74aa24933f8222f5d4761f5fba4e26c9ebfe7f673c5a16420753bf6`
`font_01_sfnt_off00008422.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x8422	7272 bytes
SHA-256: `f462303657ce1de10d3e7d5ae1fe17c8584116bd5bc216971166de87266da924`
`font_02_sfnt_off00009592.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x9592	18252 bytes
SHA-256: `c6c6b837e22de3676a2ba596b9db5dc5a1db3890ceafc7e2998a39c6caf756de`

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