PDF malware analysis — malicious · c4e8c3bc12fe39dd

MALICIOUS

PDF

40.9 KB Created: 2021-04-26 05:35:05 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04

MD5: 782bd4d3a98bd7b561e0fb62492f9a5c SHA-1: 5ef2310519d40bfdcb179bf44e8cee3b6b0e7d0a SHA-256: c4e8c3bc12fe39dda7198f023d5c483b6c7017fdd1ad7f223aa6bc73a71dbbca

160 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

This PDF document employs a common lure of free Robux and game hacks to entice users. It contains multiple embedded URLs that lead to redirectors and potentially malicious content, as indicated by the critical heuristic firings. The document body and embedded links suggest an attempt to drive users to external sites for illegitimate purposes, likely related to credential harvesting or malware distribution.

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/free-robux-generator-no-survey-or-download-2021-game-hack In PDF document text
- https://lib-stie.yai.ac.id/repository/free-roblox-download-for-chromebook.pdfIn PDF document text
- https://lib-stie.yai.ac.id/repository/how-to-get-your-old-hacked-roblox-account-back.pdfIn PDF document text
- https://lib-stie.yai.ac.id/repository/comment-acheter-des-robux-avec-une-carte-hacker.pdfIn PDF document text
- https://lib-stie.yai.ac.id/repository/mad-city-script-roblox-download-free.pdfIn PDF document text
- https://lib-stie.yai.ac.id/repository/free-roblox-game-scripts.pdfIn PDF document text
- https://lib-stie.yai.ac.id/repository/free-gamepass-roblox.pdfIn PDF document text
- https://lib-stie.yai.ac.id/repository/robloxs-got-talent-piano-hack.pdfIn PDF document text
- https://lib-stie.yai.ac.id/repository/how-use-cheat-engine-on-roblox.pdfIn PDF document text
- https://lib-stie.yai.ac.id/repository/free-robux-go-to-guuudd-info.pdfIn PDF document text
- https://lib-stie.yai.ac.id/repository/good-roblox-games-about-cities-for-free.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_off0000402b.bin`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x402B	24796 bytes
SHA-256: `a5d1b4adc524711a19f4087a1c7f37d6c39229e54d1912772b2fb5988d8bc2c8`
`font_01_sfnt_off000079b5.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x79B5	19624 bytes
SHA-256: `ffe9c2f3242a4b3edf0e73f0b89e43b4401769cdd0ed0bcb8ae162a5f5432a0e`

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