PDF malware analysis — malicious · 4451bf8db9ed37d2

MALICIOUS

PDF

42.5 KB Created: 2021-05-17 04:50:57 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-10

MD5: d00d4cf883fb2b969c2f5a99e9b5fed6 SHA-1: bae8f1305269be47b7ddb706cbb14fe0e3f5e438 SHA-256: 4451bf8db9ed37d2a259e53c6a03123c30c8a649be0786d774ba913b3a76c9cc

200 Risk Score

Machine Learning

Nyx PDF Classifier malicious score 0.9971

Heuristics 5

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.
ClickFix social engineering attack high SE_CLICKFIX

Document instructs the user to press Win+R or paste a command into a terminal — consistent with ClickFix attacks that bypass macro restrictions by tricking users into running malicious commands directly
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/479516143/play-minecraft-for-free-on-pc-game-hack In PDF document text
- https://silvterie.com.br/images/ckfinder/files/coin-master-free-link-facebook_GM406889139.pdfIn PDF document text
- https://silvterie.com.br/images/ckfinder/files/free-spins-and-coins-coin-master_GM406889139.pdfIn PDF document text
- https://silvterie.com.br/images/ckfinder/files/free-spin-in-coin-master_GM406889139.pdfIn PDF document text
- https://silvterie.com.br/images/ckfinder/files/how-to-hack-roblox-jailbreak_GM431946152.pdfIn PDF document text
- https://silvterie.com.br/images/ckfinder/files/minecraft-pe-free-download_GM479516143.pdfIn PDF document text
- https://silvterie.com.br/images/ckfinder/files/coin-master-free-daily-spins-link_GM406889139.pdfIn PDF document text
- https://silvterie.com.br/images/ckfinder/files/coin-master-generator-free_GM406889139.pdfIn PDF document text
- https://silvterie.com.br/images/ckfinder/files/classic-minecraft-net-hacks_GM479516143.pdfIn PDF document text
- https://silvterie.com.br/images/ckfinder/files/como-sacar-buen-puntaje-en-juego-coin-master-free-spins_GM406889139.pdfIn PDF document text
- https://silvterie.com.br/images/ckfinder/files/free-robux-for-free_GM431946152.pdfIn PDF document text
- https://silvterie.com.br/images/ckfinder/files/coin-master-free-coins-hack_GM406889139.pdfIn PDF document text
- https://silvterie.com.br/images/ckfinder/files/how-to-get-free-robux-easy-no-download_GM431946152.pdfIn PDF document text
- https://silvterie.com.br/images/ckfinder/files/free-robux-no-verification-required_GM431946152.pdfIn PDF document text
- https://silvterie.com.br/images/ckfinder/files/free-roblox-clothes-for-your-avatar_GM431946152.pdfIn PDF document text
- https://silvterie.com.br/images/ckfinder/files/claim-free-spins-coin-master_GM406889139.pdfIn PDF document text
- https://silvterie.com.br/images/ckfinder/files/new-free-money-links-coin-master_GM406889139.pdfIn PDF document text
- https://silvterie.com.br/images/ckfinder/files/free-online-games-like-minecraft_GM479516143.pdfIn PDF document text
- https://silvterie.com.br/images/ckfinder/files/coin-game_GM406889139.pdfIn PDF document text
- https://silvterie.com.br/images/ckfinder/files/free-robux-images_GM431946152.pdfIn PDF document text
- https://silvterie.com.br/images/ckfinder/files/how-to-hack-coin-master-spin_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_off00004cbb.bin`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x4CBB	24520 bytes
SHA-256: `b2329a5132ccf80ba409ad364c7a3fc1540905a0162f65703a02837d2cd14a36`
`font_01_sfnt_off00008434.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x8434	18116 bytes
SHA-256: `0a2b20ee34ef8ab862f65f7214c777895bcb00ebb57d072309a29ba65f102540`

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