PDF malware analysis — malicious · 1fb1e3ddb7702045

MALICIOUS

PDF

43.7 KB Created: 2021-05-16 07:31:21 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04

MD5: 741732d1dcc6a61e5443069ab5e3bccb SHA-1: 9e224c1c72e75840f8426abb13e57f20c0874d62 SHA-256: 1fb1e3ddb770204584102036de3e1ba6fca5b6e3d1bb6a78b3fc3177a4f6a6c2

160 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF document contains multiple links that redirect to a known malicious infrastructure, specifically advertising 'Coin Master Free Spins App' and game hacks. The presence of these links and the ML classifier's high confidence score indicate a malicious intent to lure users to potentially harmful websites. No scripts were extracted, but the document's structure and embedded links strongly suggest a phishing or scam attempt.

Machine Learning

Nyx PDF Classifier malicious score 0.9648

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/coin-master-free-spins-app-game-hack In PDF document text
- http://prazdnik-kzn.ru/images/free-roblox-accounts-with-robux-that-work-2021_GM431946152.pdfIn PDF document text
- http://prazdnik-kzn.ru/images/robux-hacks-2021_GM431946152.pdfIn PDF document text
- http://prazdnik-kzn.ru/images/roblox-hack-tool_GM431946152.pdfIn PDF document text
- http://prazdnik-kzn.ru/images/minecraft-java-code-free_GM479516143.pdfIn PDF document text
- http://prazdnik-kzn.ru/images/free-robux-codes-2021_GM431946152.pdfIn PDF document text
- http://prazdnik-kzn.ru/images/coin-master-hack-software-download_GM406889139.pdfIn PDF document text
- http://prazdnik-kzn.ru/images/roblox-controversy_GM431946152.pdfIn PDF document text
- http://prazdnik-kzn.ru/images/how-to-get-free-coins-in-mcpe-master_GM406889139.pdfIn PDF document text
- http://prazdnik-kzn.ru/images/ear-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
- http://prazdnik-kzn.ru/images/mcpe-master-coins-hack-download_GM406889139.pdfIn PDF document text
- http://prazdnik-kzn.ru/images/blogspot-coin-master-free-spins_GM406889139.pdfIn PDF document text
- http://prazdnik-kzn.ru/images/minecraft-18-9-hacked-client_GM479516143.pdfIn PDF document text
- http://prazdnik-kzn.ru/images/minecraft-hacked-client-download_GM479516143.pdfIn PDF document text
- http://prazdnik-kzn.ru/images/to-get-free-robux_GM431946152.pdfIn PDF document text
- http://prazdnik-kzn.ru/images/coin-master-free-stars_GM406889139.pdfIn PDF document text
- http://prazdnik-kzn.ru/images/minecraft-mods-download-free_GM479516143.pdfIn PDF document text
- http://prazdnik-kzn.ru/images/roblox-fun-robux_GM431946152.pdfIn PDF document text
- http://prazdnik-kzn.ru/images/daily-free-spins-coin-master-2021_GM406889139.pdfIn PDF document text
- http://prazdnik-kzn.ru/images/coin-master-hack-without-human-verification-2021_GM406889139.pdfIn PDF document text
- http://prazdnik-kzn.ru/images/coin-master-daily-free-spins-link-today-twitter_GM406889139.pdfIn PDF document text
- http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`stream_003_off00004767.bin`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x4767	24692 bytes
SHA-256: `c11a7372632fe4663b3a95e85ec7d2cb0396ddc8de8297ef966f92510f9290ba`
`font_01_sfnt_off00007fb0.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x7FB0	2820 bytes
SHA-256: `96a70491b0783ad8c6fc9b11a18f021aa22c69ac41ee4499b781d16a1b99b689`
`font_02_sfnt_off00008950.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x8950	17884 bytes
SHA-256: `21af4872a04c62c178ac31651a333ecdcea5bb1ed4ceeeef1956d42e8fc37ea8`

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