PDF malware analysis — malicious · 5ffd7c4724521b0d

MALICIOUS

PDF

43.4 KB Created: 2021-06-03 08:08:50 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04

MD5: 4b56b8a64704cbd3fa23b43a69219857 SHA-1: d21eb78b5deb2827b382c65d091a584299ddfef7 SHA-256: 5ffd7c4724521b0d18df5aa8000ec6cc869294a84988098e73dfd4790f8ceae9

160 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF document contains multiple embedded links that lead to a known malicious redirector, disguised as a generator for game hacks and free currency. The document body and heuristics indicate a lure for free in-game items, which is a common social engineering tactic. The primary malicious URL identified is https://netcdn.online/app/406889139/hack-coin-master-game-game-hack.

Machine Learning

Nyx PDF Classifier malicious score 0.9865

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.online/app/406889139/hack-coin-master-game-game-hack In PDF document text
- https://www.wessexandrology.com/uploads/files/files/free-coins-and-spins-for-coin-master_GM406889139.pdfIn PDF document text
- https://www.wessexandrology.com/uploads/files/files/how-to-get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
- https://www.wessexandrology.com/uploads/files/files/earn-free-robux-today_GM431946152.pdfIn PDF document text
- https://www.wessexandrology.com/uploads/files/files/coin-master-daily-free-spins-link_GM406889139.pdfIn PDF document text
- https://www.wessexandrology.com/uploads/files/files/free-roblox-accounts-with-robux-that-work-2021_GM431946152.pdfIn PDF document text
- https://www.wessexandrology.com/uploads/files/files/free-robux-just-click_GM431946152.pdfIn PDF document text
- https://www.wessexandrology.com/uploads/files/files/coin-master-hack-version_GM406889139.pdfIn PDF document text
- https://www.wessexandrology.com/uploads/files/files/coin-master-free-cards-link_GM406889139.pdfIn PDF document text
- https://www.wessexandrology.com/uploads/files/files/free-robux-gift-card-codes_GM431946152.pdfIn PDF document text
- https://www.wessexandrology.com/uploads/files/files/how-do-i-get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
- https://www.wessexandrology.com/uploads/files/files/google-how-do-you-get-free-robux_GM431946152.pdfIn PDF document text
- https://www.wessexandrology.com/uploads/files/files/coin-master-free-stuff-links_GM406889139.pdfIn PDF document text
- https://www.wessexandrology.com/uploads/files/files/free-robux-accounts-2021_GM431946152.pdfIn PDF document text
- https://www.wessexandrology.com/uploads/files/files/chisel-and-bits-mod-minecraft-pe_GM479516143.pdfIn PDF document text
- https://www.wessexandrology.com/uploads/files/files/100-robux_GM431946152.pdfIn PDF document text
- https://www.wessexandrology.com/uploads/files/files/microsoft-roblox_GM431946152.pdfIn PDF document text
- https://www.wessexandrology.com/uploads/files/files/how-to-get-a-lot-of-robux_GM431946152.pdfIn PDF document text
- https://www.wessexandrology.com/uploads/files/files/minecraft-java-edition-redeem-code-free-2021_GM479516143.pdfIn PDF document text
- https://www.wessexandrology.com/uploads/files/files/microsoft-rewards-robux_GM431946152.pdfIn PDF document text
- https://www.wessexandrology.com/uploads/files/files/spins-coin-master_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_004_off00005042.bin`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x5042	25616 bytes
SHA-256: `4c5dde6b60bf276ac754d4e2d4701b65d14f4381db6e07d796c5696bd00643b2`
`font_01_sfnt_off00008809.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x8809	17976 bytes
SHA-256: `849fda9a27f10f21eac2a108988feb595c64d385794befb8f0e2a1653e8ad0ee`

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