PDF malware analysis — malicious · 18c840788dbd7860

MALICIOUS

PDF

40.7 KB Created: 2021-04-26 15:08:59 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04

MD5: 76e760518fb8590ce09cc526eefc6e9f SHA-1: d9806e99a2cbbe77b7ec4b4bb563161b074ba6d8 SHA-256: 18c840788dbd786041ecaa953d70171103b5d88c6cf2582f0683fc5229864f9b

160 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF document contains multiple links to websites offering free Robux and game hacks, which are known lures for malicious activity. One critical heuristic identified a link to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains references to these lures and embedded URLs, suggesting an attempt to drive users to potentially harmful content. No scripts were extracted, but the presence of malicious links and the lure indicate a phishing or scam attempt.

Machine Learning

Nyx PDF Classifier malicious score 0.9941

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 https://netcdn.xyz/app/431946152/obc-free-robux-game-hack In PDF document text
- https://lib-stie.yai.ac.id/repository/coolest-free-roblox-characters.pdfIn PDF document text
- https://lib-stie.yai.ac.id/repository/best-free-streaming-device-for-roblox-and-low-end-pcs.pdfIn PDF document text
- https://lib-stie.yai.ac.id/repository/robux-kingsml-free-robux.pdfIn PDF document text
- https://lib-stie.yai.ac.id/repository/roblox-dance-hack.pdfIn PDF document text
- https://lib-stie.yai.ac.id/repository/robux-hack-no-game-download.pdfIn PDF document text
- https://lib-stie.yai.ac.id/repository/free-accounts-for-roblox-with-robux-2021.pdfIn PDF document text
- https://lib-stie.yai.ac.id/repository/big-games-free-pet-roblox.pdfIn PDF document text
- https://lib-stie.yai.ac.id/repository/las-mejores-paginas-de-hacks-de-roblox.pdfIn PDF document text
- https://lib-stie.yai.ac.id/repository/how-to-cheat-noclip-in-roblox-2021.pdfIn PDF document text
- https://lib-stie.yai.ac.id/repository/hacked-text-to-roblox.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_off0000404d.bin`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x404D	26632 bytes
SHA-256: `0e7b7cf7e232593f73aef2829b75cd211e2d5c6f5acae7138721d5383ce4bb71`
`font_01_sfnt_off00007e17.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x7E17	18012 bytes
SHA-256: `46aa8cc5943f365e08d4e9a93e7f285bf4d8b8d2f326dae46fd014642aedec55`

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