PDF malware analysis — malicious · 8c0c53cc539dec88

MALICIOUS

PDF

43.1 KB Created: 2021-05-17 11:06:15 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04

MD5: 772b1d2453df887248d7886a343ad60f SHA-1: 0a56dac49cdf54e58310f2e811db9cfd0b549a96 SHA-256: 8c0c53cc539dec883c48b5df699edc9e7d5114cb651c6c0e5ce6a4feb4a0a890

160 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF contains multiple embedded links, including one identified as a malicious redirector pointing to 'daily-free-spin-coin-master-link-game-hack'. This heuristic, combined with the ML classifier's high confidence, indicates a malicious lure designed to trick users into visiting potentially harmful sites. The document body and embedded artifacts suggest a scam related to free game currency or hacks.

Machine Learning

Nyx PDF Classifier malicious score 0.9969

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/406889139/daily-free-spin-coin-master-link-game-hack In PDF document text
- https://naturenz.vn/public/files/get-free-spins-coin-master_GM406889139.pdfIn PDF document text
- https://naturenz.vn/public/files/hacks-to-get-free-robux_GM431946152.pdfIn PDF document text
- https://naturenz.vn/public/files/free-robux-hack-us_GM431946152.pdfIn PDF document text
- https://naturenz.vn/public/files/play-minecraft-for-free_GM479516143.pdfIn PDF document text
- https://naturenz.vn/public/files/coin-master-free-spin-generator-without-human-verification_GM406889139.pdfIn PDF document text
- https://naturenz.vn/public/files/free-robux-com-2021_GM431946152.pdfIn PDF document text
- https://naturenz.vn/public/files/free-robux_GM431946152.pdfIn PDF document text
- https://naturenz.vn/public/files/but-link-says-free-robux_GM431946152.pdfIn PDF document text
- https://naturenz.vn/public/files/free-robux-sites-2021_GM431946152.pdfIn PDF document text
- https://naturenz.vn/public/files/free-robux-without-any-verification_GM431946152.pdfIn PDF document text
- https://naturenz.vn/public/files/can-you-host-a-minecraft-server-for-free_GM479516143.pdfIn PDF document text
- https://naturenz.vn/public/files/free-spins-link-in-coin-master-2021_GM406889139.pdfIn PDF document text
- https://naturenz.vn/public/files/hack-coin-master-spin-android_GM406889139.pdfIn PDF document text
- https://naturenz.vn/public/files/coin-master-tips_GM406889139.pdfIn PDF document text
- https://naturenz.vn/public/files/free-links-for-coin-master_GM406889139.pdfIn PDF document text
- https://naturenz.vn/public/files/coin-master-mod-apk-free-download_GM406889139.pdfIn PDF document text
- https://naturenz.vn/public/files/best-hacked-client_GM479516143.pdfIn PDF document text
- https://naturenz.vn/public/files/coin-master-online-hack-tool_GM406889139.pdfIn PDF document text
- https://naturenz.vn/public/files/coin-master-hacks_GM406889139.pdfIn PDF document text
- https://naturenz.vn/public/files/coin-master-free-spin-link-today-2021_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
`stream_003_off00004a7e.bin`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x4A7E	25736 bytes
SHA-256: `6760f8ddafb355fac69e1bbab74ee4756302af0101ea73915410ae76e1dad189`
`font_01_sfnt_off000085c9.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x85C9	18476 bytes
SHA-256: `13087f23ced5a654764a402ace47e06b7ceeb886891228a443e0cb07dd9c4176`

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