PDF malware analysis — malicious · 1e8feb2a076efa95

MALICIOUS

PDF

33.8 KB Created: 2021-07-04 05:52:36 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-05

MD5: 6eaa59d51311fddeeee6a0f99362fd86 SHA-1: 511e9fbea3b1f398ef8a135fc64be0d3ce186146 SHA-256: 1e8feb2a076efa959548d6e2d517a9c177b8828bd713ca4e0bffb111d4aea159

82 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF document contains numerous embedded URLs, including a primary redirector at http://netcdn.tw/app/431946152/free-robux-by-watching-ads-game-hack, which is associated with game hacks and free item lures. The document body explicitly mentions 'Free Robux By Watching Ads', reinforcing the lure. While no scripts were extracted, the presence of these links and the lure strongly suggests the PDF is designed to redirect users to malicious sites, likely for credential harvesting or further malware delivery.

Machine Learning

Nyx PDF Classifier malicious score 0.9824

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.nordicstar.co.uk/uploads/files/files/roblox-prison-life-v20-infinite-ammo-hack-2021_GM431946152.pdfIn PDF document text
- https://www.nordicstar.co.uk/uploads/files/files/how-to-get-free-followers-on-roblox_GM431946152.pdfIn PDF document text
- https://www.nordicstar.co.uk/uploads/files/files/coin-master-generator-hack_GM406889139.pdfIn PDF document text
- https://www.nordicstar.co.uk/uploads/files/files/how-to-hack-someones-account-on-roblox_GM431946152.pdfIn PDF document text
- https://www.nordicstar.co.uk/uploads/files/files/coin-master-spins_GM406889139.pdfIn PDF document text
- https://www.nordicstar.co.uk/uploads/files/files/how-to-get-free-robux-subscribe_GM431946152.pdfIn PDF document text
- https://www.nordicstar.co.uk/uploads/files/files/free-private-minecraft-server_GM479516143.pdfIn PDF document text
- https://www.nordicstar.co.uk/uploads/files/files/get-coin-master-hack_GM406889139.pdfIn PDF document text
- https://www.nordicstar.co.uk/uploads/files/files/free-roblox-hack_GM431946152.pdfIn PDF document text
- https://www.nordicstar.co.uk/uploads/files/files/roblox-free-download-laptop_GM431946152.pdfIn PDF document text
- https://www.nordicstar.co.uk/uploads/files/files/how-to-get-free-robux-without-paying_GM431946152.pdfIn PDF document text
- https://www.nordicstar.co.uk/uploads/files/files/minecraft-build-hacks_GM479516143.pdfIn PDF document text
- https://www.nordicstar.co.uk/uploads/files/files/free-spin-coin-master-iphone_GM406889139.pdfIn PDF document text
- https://www.nordicstar.co.uk/uploads/files/files/coin-master-event-hack_GM406889139.pdfIn PDF document text
- https://www.nordicstar.co.uk/uploads/files/files/100-free-spins-coin-master_GM406889139.pdfIn PDF document text
- https://www.nordicstar.co.uk/uploads/files/files/free-robux-hack-us_GM431946152.pdfIn PDF document text
- https://www.nordicstar.co.uk/uploads/files/files/free-roblox-account-gen_GM431946152.pdfIn PDF document text
- https://www.nordicstar.co.uk/uploads/files/files/how-do-you-hack-minecraft_GM479516143.pdfIn PDF document text
- https://www.nordicstar.co.uk/uploads/files/files/coin-master-free-spins-hack-download_GM406889139.pdfIn PDF document text
- https://www.nordicstar.co.uk/uploads/files/files/roblox-robux-hack-with-cheat-engine-64_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
`font_00_sfnt_off00002b43.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x2B43	22616 bytes
SHA-256: `c22bc724b4f2eb0c7e75f79e62056193f81466467d26b35b910deed927368e4e`
`font_01_sfnt_off00005dbe.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x5DBE	19660 bytes
SHA-256: `f0cdf6166c464805662a9cde01402bcc449eb6222422d9d5af766ad530424c87`

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