PDF malware analysis — malicious · 99541e3ca4a05990

MALICIOUS

PDF

35.2 KB Created: 2021-06-29 18:05:24 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04

MD5: 18a1ae1cde33efecf439180953c0be00 SHA-1: a0c6bccc277216a95b045a92cc00602d80629046 SHA-256: 99541e3ca4a059903dee7ee69b92e6881115b02be3d7ae9537ddcad3e7819354

160 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF document contains multiple links to external websites, including a known malicious redirector, under the guise of providing game hacks and cheats. The document body and embedded URLs suggest a lure for free Robux or other game-related exploits. The primary malicious URL identified is http://netcdn.co/app/431946152/how-to-hack-free-robux-in-roblox-in-a-computer-game-hack, which likely leads to further malicious content or phishing pages.

Machine Learning

Nyx PDF Classifier malicious score 0.9980

Heuristics 4

PDF links to a 'free generator / game hack' redirector critical 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. CRITICAL on its own: the /app/<id>/<slug>-game-hack path shape is unambiguous scam infra, and the host rotates so a host-list match can't be relied on.
PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK

PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
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
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.co/app/431946152/how-to-hack-free-robux-in-roblox-in-a-computer-game-hack In PDF document text
- http://www.khneisser.ch/uploaded_files/userfiles/files/free-robux-sites-2021_GM431946152.pdfIn PDF document text
- http://www.khneisser.ch/uploaded_files/userfiles/files/free-roblox-outfits_GM431946152.pdfIn PDF document text
- http://www.khneisser.ch/uploaded_files/userfiles/files/hack-app-for-roblox-pet-simulator-free-pets_GM431946152.pdfIn PDF document text
- http://www.khneisser.ch/uploaded_files/userfiles/files/roblox-jailbreak-free-money-2021_GM431946152.pdfIn PDF document text
- http://www.khneisser.ch/uploaded_files/userfiles/files/roblox-the-hunger-games-cheats_GM431946152.pdfIn PDF document text
- http://www.khneisser.ch/uploaded_files/userfiles/files/minecraft-maps-pe-free-download_GM479516143.pdfIn PDF document text
- http://www.khneisser.ch/uploaded_files/userfiles/files/how-to-host-a-minecraft-server-for-free_GM479516143.pdfIn PDF document text
- http://www.khneisser.ch/uploaded_files/userfiles/files/how-to-hack-any-roblox-account_GM431946152.pdfIn PDF document text
- http://www.khneisser.ch/uploaded_files/userfiles/files/hack-xp-net-coin-master_GM406889139.pdfIn PDF document text
- http://www.khneisser.ch/uploaded_files/userfiles/files/free-robux-hack-2021_GM431946152.pdfIn PDF document text
- http://www.khneisser.ch/uploaded_files/userfiles/files/roblox-hack-com_GM431946152.pdfIn PDF document text
- http://www.khneisser.ch/uploaded_files/userfiles/files/roblox-assassin-cheat-codes_GM431946152.pdfIn PDF document text
- http://www.khneisser.ch/uploaded_files/userfiles/files/coin-master-free-spins-cheat-deutsch_GM406889139.pdfIn PDF document text
- http://www.khneisser.ch/uploaded_files/userfiles/files/wall-hack-roblox-download_GM431946152.pdfIn PDF document text
- http://www.khneisser.ch/uploaded_files/userfiles/files/best-hack-for-coin-master-2021_GM406889139.pdfIn PDF document text
- http://www.khneisser.ch/uploaded_files/userfiles/files/robux-robians-robuxs-hack_GM431946152.pdfIn PDF document text
- http://www.khneisser.ch/uploaded_files/userfiles/files/free-roblox-codes-for-robux-bc_GM431946152.pdfIn PDF document text
- http://www.khneisser.ch/uploaded_files/userfiles/files/coin-master-free-spins-and-coins-today-gift-reward_GM406889139.pdfIn PDF document text
- http://www.khneisser.ch/uploaded_files/userfiles/files/roblox-free-robux-codes_GM431946152.pdfIn PDF document text
- http://www.khneisser.ch/uploaded_files/userfiles/files/how-to-get-free-spins-on-coin-master-game_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
`font_00_sfnt_off000031f0.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x31F0	22088 bytes
SHA-256: `c1de22a0e0f2150828a0c6897a5854d64f6423c7c73749717f4fcfc8e956794c`
`font_01_sfnt_off000062da.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x62DA	19664 bytes
SHA-256: `8db82b2503423f95bcbbffc7f354e60e5c39e4a05166cde59f1952bf983931d5`

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