PDF malware analysis — malicious · 3fcbd95d5c80576b

MALICIOUS

PDF

33.8 KB Created: 2021-06-25 05:03:07 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04

MD5: c899d135d7aee74289ee3f8424c3416b SHA-1: 9675c75bd3a7d00a4a3b6688c19ab194ee47d564 SHA-256: 3fcbd95d5c80576bbc88d872f982bb2531a074f5a7814b2e64059995ff02f482

160 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

This PDF document employs a common lure of free game currency and hacks to entice users. It contains multiple embedded links pointing to redirectors and further PDF files, indicating a multi-stage lure or download process. The primary malicious redirector is http://netcdn.co/app/431946152/1-hack-roblox-game-hack, which is flagged as known malicious infrastructure. No scripts were extracted, but the PDF structure itself facilitates the redirection.

Machine Learning

Nyx PDF Classifier malicious score 0.9980

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 http://netcdn.co/app/431946152/1-hack-roblox-game-hack In PDF document text
- http://www.lorengindonesia.com/new/public/ckfinder/userfiles/files/free-robux-cards_GM431946152.pdfIn PDF document text
- http://www.lorengindonesia.com/new/public/ckfinder/userfiles/files/free-robux-for-free_GM431946152.pdfIn PDF document text
- http://www.lorengindonesia.com/new/public/ckfinder/userfiles/files/robux-card-codes-free_GM431946152.pdfIn PDF document text
- http://www.lorengindonesia.com/new/public/ckfinder/userfiles/files/easy-ways-to-get-free-robux_GM431946152.pdfIn PDF document text
- http://www.lorengindonesia.com/new/public/ckfinder/userfiles/files/how-to-get-minecraft-for-free-on-android-device_GM479516143.pdfIn PDF document text
- http://www.lorengindonesia.com/new/public/ckfinder/userfiles/files/free-robux-please_GM431946152.pdfIn PDF document text
- http://www.lorengindonesia.com/new/public/ckfinder/userfiles/files/how-to-hack-roblox-accounts-2021_GM431946152.pdfIn PDF document text
- http://www.lorengindonesia.com/new/public/ckfinder/userfiles/files/minecraft-free-edition_GM479516143.pdfIn PDF document text
- http://www.lorengindonesia.com/new/public/ckfinder/userfiles/files/free-minecraft-texture-packs_GM479516143.pdfIn PDF document text
- http://www.lorengindonesia.com/new/public/ckfinder/userfiles/files/free-pet-food-on-coin-master_GM406889139.pdfIn PDF document text
- http://www.lorengindonesia.com/new/public/ckfinder/userfiles/files/coin-master-new-cards-hack_GM406889139.pdfIn PDF document text
- http://www.lorengindonesia.com/new/public/ckfinder/userfiles/files/earn-free-robux-on-roblox_GM431946152.pdfIn PDF document text
- http://www.lorengindonesia.com/new/public/ckfinder/userfiles/files/game-dev-life-roblox-free_GM431946152.pdfIn PDF document text
- http://www.lorengindonesia.com/new/public/ckfinder/userfiles/files/no-human-verification-coin-master-hack_GM406889139.pdfIn PDF document text
- http://www.lorengindonesia.com/new/public/ckfinder/userfiles/files/coin-master-daily-free-spins-link-today-2021_GM406889139.pdfIn PDF document text
- http://www.lorengindonesia.com/new/public/ckfinder/userfiles/files/rbx-free-robux_GM431946152.pdfIn PDF document text
- http://www.lorengindonesia.com/new/public/ckfinder/userfiles/files/minecraft-windows-10-code-free_GM479516143.pdfIn PDF document text
- http://www.lorengindonesia.com/new/public/ckfinder/userfiles/files/how-to-get-free-spins-and-coins-in-coin-master_GM406889139.pdfIn PDF document text
- http://www.lorengindonesia.com/new/public/ckfinder/userfiles/files/roblox-craftwars-cheats_GM431946152.pdfIn PDF document text
- http://www.lorengindonesia.com/new/public/ckfinder/userfiles/files/free-robux-rewards_GM431946152.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
`font_00_sfnt_off00002fe7.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x2FE7	21804 bytes
SHA-256: `96412a44070b88dc0ac199ad67508a41d3ff7e729224913b53bc71cf1bb47e8f`
`font_01_sfnt_off00005fd5.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x5FD5	18760 bytes
SHA-256: `93e4593264b5fd7566fe5af9f581959b2998c15e524d047bbc6962d93b1fd92f`

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