PDF malware analysis — malicious · 1c65a8ab05f4c9ef

MALICIOUS

PDF

34.6 KB Created: 2021-06-29 05:34:54 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04

MD5: d67d58302c132cb0f1a91ef83a840710 SHA-1: f2bd9a43ffb28e51fb03bf3baf3bbf27ed732be8 SHA-256: 1c65a8ab05f4c9ef516ce2a590a025f0b9b3fe57259b81e5341d17bb613650f6

160 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF contains a critical heuristic firing for a game hack redirect lure, directing users to a URL that promises free Robux. The document body reinforces this lure with similar promises and includes the same malicious URL. This indicates a phishing or scam attempt designed to redirect users to potentially malicious infrastructure.

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/earn-free-robux-by-downloading-apps-and-completing-offers-game-hack In PDF document text
- https://www.croydex.com/uploads/files/files/free-robux-websites-no-human-verification_GM431946152.pdfIn PDF document text
- https://www.croydex.com/uploads/files/files/free-robux-hack-human-verification_GM431946152.pdfIn PDF document text
- https://www.croydex.com/uploads/files/files/free-robux-no-verification-2021-ios_GM431946152.pdfIn PDF document text
- https://www.croydex.com/uploads/files/files/roblox-free-giveaway-live_GM431946152.pdfIn PDF document text
- https://www.croydex.com/uploads/files/files/how-to-get-robux-fast_GM431946152.pdfIn PDF document text
- https://www.croydex.com/uploads/files/files/mcpe-free-download_GM479516143.pdfIn PDF document text
- https://www.croydex.com/uploads/files/files/hack-coin-master-android-2021_GM406889139.pdfIn PDF document text
- https://www.croydex.com/uploads/files/files/get-me-robux_GM431946152.pdfIn PDF document text
- https://www.croydex.com/uploads/files/files/coin-master-free-spins-link_GM406889139.pdfIn PDF document text
- https://www.croydex.com/uploads/files/files/hack-client_GM479516143.pdfIn PDF document text
- https://www.croydex.com/uploads/files/files/hack-script-roblox-games_GM431946152.pdfIn PDF document text
- https://www.croydex.com/uploads/files/files/how-to-get-800-robux-for-free_GM431946152.pdfIn PDF document text
- https://www.croydex.com/uploads/files/files/roblox-jailbreak-hack-client-redboy_GM431946152.pdfIn PDF document text
- https://www.croydex.com/uploads/files/files/minecraft-windows-10-edition-free_GM479516143.pdfIn PDF document text
- https://www.croydex.com/uploads/files/files/coin-master-hack-download-2021_GM406889139.pdfIn PDF document text
- https://www.croydex.com/uploads/files/files/is-minecraft-free-on-nintendo-switch_GM479516143.pdfIn PDF document text
- https://www.croydex.com/uploads/files/files/safe-free-robux-no-password-or-human-verification_GM431946152.pdfIn PDF document text
- https://www.croydex.com/uploads/files/files/free-robux-redeem-codes_GM431946152.pdfIn PDF document text
- https://www.croydex.com/uploads/files/files/free-robux-today-no-survey_GM431946152.pdfIn PDF document text
- https://www.croydex.com/uploads/files/files/coin-master-hack-apk-download-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
`font_00_sfnt_off00002fb9.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x2FB9	21456 bytes
SHA-256: `0075196b11a312232fa6a973f4a5e8f8cd4a03611516a5380bfbc20050cae8f6`
`font_01_sfnt_off00005ee8.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x5EE8	20136 bytes
SHA-256: `1e598d51ed54ef26e998193e9edaae73d02271cf95791a976648cb9cb3755a0c`

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